Re: [CentOS] gdm doesnt work.
Try this: /etc/systemd/system/display-manager.service -> /usr/lib/systemd/system/kdm.service Only in your case it would be gdm.service. On 12/08/2014 11:49 AM, dE wrote: On 12/08/14 22:02, m.r...@5-cent.us wrote: dE wrote: Hi! I just installed GDM on centos 7. I'm starting it by # gdm. However, all I see is a text cursor (as with the TTYs), nothing else. X works well. Logs have no errors. GDM logs are a copy of X logs. Are you at runlevel 5? mark I tried isolate graphical.target also. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] flash-plugin
I get the same symptom when trying to upgrade from the Adobe repo on Fedora 20. On 12/16/2014 01:40 PM, Bill Maltby (C4B) wrote: On Tue, 2014-12-16 at 12:33 -0600, kqt4a...@gmail.com wrote: On Tue, 16 Dec 2014, m.r...@5-cent.us wrote: kqt4a...@gmail.com wrote: What am I doing wrong? # yum update flash-plugin Setting up Update Process No Packages marked for Update # yum install flash-plugin Setting up Install Process Package flash-plugin-11.2.202.394-0.1.el6.rf.i686 already installed and latest version Nothing to do That is picking up from rpmforge (or is it reporforge now?). You want to go to the Adobe site and get their repo set up. After set up you'll have adobe-linux-x86_64.repo in /etc/yum.repos.d HTH, Bill ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] X11 console
+1 It can be quite annoying when the X console is changed from one Virtual Console to another as happens with almost every release of CentOS and Fedora. I would really like it to be always consistent at Console 7. And the "real" system console should always be Console 1. I am OK with change, but this seems to be fairly random change with know apparent advantage or benefit. It is a big deal to keep it consistent. That way I know what to tell customers when they call and I have to talk them through a procedure over the phone. Thanks! On 12/18/2014 08:10 AM, Andreas Benzler wrote: Hello Guys… I need to revert the X11 graphical server to Console 7. and enable VT1 as normal text as it was on the old distr.. Sincerely AndyBe ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Orwell's 1984 from Freedesktop,org?
I run a small consulting service and work with both individuals and (very) small businesses. The objective of my consulting business is to help average people move to Linux when they decide that they have had enough of the M$ money wheel and endless malware infections. Not one individual who belongs to that class of users cares how Uniix/Linux works, how it does updates or how to install new stuff. They *DON'T WANT* to know all that stuff. They want only one thing; to use the computer as a tool to perform needed personal or business tasks. My wife is my most frequent client and she in every way reflects the attitude of every customer - except for two - that I have. "Don't teach me how the computer works. I don't care. Just make it work for me," is the common refrain. If there is a problem, she calls me; if she wants new software installed, she calls me; if updates are required, she does not want to see any pop-up messages, she just wants her system to be updated automatically when needed. In most cases I go onsite to install new software or do updates. HOWEVER!!! There are times when I need to talk a customer through doing something that they would never, ever do if there were any other choice. They understand when that happens and together we can always do it in far less time than it would take for me to travel there and back. But I *NEVER* want them to go mucking about on their own - EVER! They have no idea what they are doing and should not be doing any type of admin stuff - and that is really how they want it. They should be password protected from everything administrative or they will cause me much more work and cost themselves a great deal of money as I try to fix the predicament that they have gotten themselves into. For example, I cannot tell you how many times I get a call from users who have purchased a new printer and tried to install the software from the accompanying CD. AARRRGGHHH!! I tell them to just plug it in and it should work without installing any software, and for those who have purchased Lexmark printers, I tell them to take it back and get something supported. I am so glad they cannot try to force that software onto the Linux box. I disable and remove PackageKit to prevent that kind of stuff. As for those other two customers, they don't really care much anyway. They have the knowledge but not the time to perform the tasks they hire me to do. They really don't want me to change much as they have it working the way they want and like it. That includes updates - or not doing updates - and everything else. For those historically ignorant developers, I say that they had *BETTER* care how it has always been done! It is that history, that philosophical difference from other operating systems that has made Linux as popular as it is today. Change is good, but the philosophy of Linux is important to ensure that the power, flexibility, security, reliability, and quality of Linux do not suffer. See my article: https://opensource.com/business/14/12/linux-philosophy and I have another article as follow-up that should appear there soon. So, Scott, that is a very long-winded and rantful way of saying that I agree with you. ;-) On 01/23/2015 06:37 AM, Scott Robbins wrote: Originally, packagekit, which is a GUI package manager, wanted to allow all users to install anything without a password. When a bug report was filed, the developer mentioned that they didn't care how Unix had done things in the past. This made the front page of slashdot, to almost universal derision, and RH changed it. In Fedora, I believe it still allows any user to update an installed signed package without asking for authentication. They tried to do that in RH as well, but a bug report was filed, and it was changed. In my less than humble opinion, this is how it should be. A non-privileged user should not be allowed to make changes to the system. -- -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Very slow disk I/O
+1 And remember that I/O is more than just disk. The atop monitor gives you information like top and htop, but also provides a lot of I/O information as well including network. Perhaps your server is the target of a network-based DDOS attack which can cause lots of I/O wait time. Also look at top to see what numbers are in the si and hi columns. THese stand for software and hardware interrupts. If one of those is high you can also narrow it down. Hope this helps. On 01/28/2015 07:51 AM, Nicolas Thierry-Mieg wrote: On 01/28/2015 01:32 PM, Jatin Davey wrote: Hi Users I am using RHEL 6.5 on my server. From top command i can see that the processors in my server are spending a lot of time on wait for I/O. I can see high percentage in terms of 30-50% on "wa" time. Here is the df output about the disk space in my system: ** [root@localhost images]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 1915071844 103227908 1714563936 6% / tmpfs32931472 0 32931472 0% /dev/shm ** Could someone point me on how to improve the disk I/O on my server and reduce the wait time on I/O. you could use iotop or vmstat to see what processes are causing the IO. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Easy way to strip down CentOS?
Perhaps I have not been following closely enough, but why go backwards? Why not start with a "minimal" installation and then add only those packages that are needed for your situation? -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Easy way to strip down CentOS?
Ok, I understand, now. I just leave multiple desktops in place and switch between them as I want. But perhaps you have reasons to do it as you do. That is one thing I really appreciate about Linux, the fact that there are many, many ways to accomplish almost everything and that what is right and works for me may not be what works best for you. Your scripting style is irrelevant so long as it gets the job done for you. And one tenet the Unix/Linux Philosophy is, "automate everything," which is what you have done. On 02/26/2015 09:21 AM, Niki Kovacs wrote: Le 26/02/2015 15:00, David Both a écrit : Perhaps I have not been following closely enough, but why go backwards? Why not start with a "minimal" installation and then add only those packages that are needed for your situation? Here's why. I'm currently experimenting with CentOS on my workstation, trying out different desktop environments like GNOME3, KDE, MATE, Xfce. But at the same time, I'm also working on that same workstation, for example developing websites on a local LAMP stack, using multimedia apps like Audacity to edit some audio tracks for my training courses, etc. When switching from one desktop environment to another for the sake of trying it out, there's always tons of cruft on the system, even after a yum groupremove "Old Desktop Environment". And I don't want to do a fresh reinstallation, because I have all my data and files in place, and this is a RAID 1 installation, so it's not exactly trivial to reinstall and put everything back in place. Anyway, I spent a couple hours experimenting, and I found a satisfying solution. It's not very elegant, but it works. Here goes. 1. First, make a list of the packages contained in a minimal installation. This is easy, since I can do a minimal installation in a virtual guest, and then run the following little script: #!/bin/bash # # create_package_list.sh # # (c) Niki Kovacs, 2014 TMP=/tmp RPMLIST=$TMP/rpmlist.txt PKGLIST=$TMP/pkglist.txt rm -f $RPMLIST $PKGLIST rpm -qa | sort > $RPMLIST sed 's/-[^-]*-[^-]*\.[^.]*\.[^.]*$//' $RPMLIST > $PKGLIST 2. I copy that package list to the 'core' file in my Git repo and run the following script on the system I want to prune: #!/bin/bash # # purge_system.sh # # (c) Niki Kovacs, 2014 CWD=$(pwd) TMP=/tmp RPMLIST=$TMP/rpmlist.txt PKGLIST=$TMP/pkglist.txt PKGINFO=$TMP/pkg_database rpm -qa | sort > $RPMLIST sed 's/-[^-]*-[^-]*\.[^.]*\.[^.]*$//' $RPMLIST > $PKGLIST PACKAGES=$(egrep -v '(^\#)|(^\s+$)' $PKGLIST) rm -rf $RPMLIST $PKGLIST $PKGINFO mkdir $PKGINFO # Create core package database echo echo "+==" echo "| Creating core package database..." echo "+==" echo sleep 3 CORE=$(egrep -v '(^\#)|(^\s+$)' $CWD/../pkglists/core) for PACKAGE in $CORE; do printf "." touch $PKGINFO/$PACKAGE done unset CRUFT # Check installed packages against core package database echo echo echo "+" echo "| Checking for packages to be removed from your system..." echo "+" echo sleep 3 for PACKAGE in $PACKAGES; do if [ -r $PKGINFO/$PACKAGE ]; then continue else printf "." CRUFT="$CRUFT $PACKAGE" fi done echo echo # Remove all non-core packages yum remove $CRUFT I've tested this a few times, and it works as expected. I know my scripting style is a bit hodge-podge. If you have a more elegant solution, I'm always open for suggestions. Cheers, Niki -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problems with getty and X on runlevel switch [Was: Re: The future of centos]
The easy way to restart gdm is when you are on the login screen itself or the desktop simply press Ctrl-Alt-Backspace. This works for Upstart in CentOS 6.x but will not work for CentOS 7.x which uses Systemd. The service command does not work for gdm. However, logging out of the desktop will restart gdm. It works for the graphical login exactly like the gettys in a TTY environment. On 04/08/2015 06:36 AM, Liam O'Toole wrote: On 2015-04-04, Bill Maltby (C4B) wrote: On Sat, 2015-04-04 at 11:12 +0100, Nux! wrote: 100% with Digimer here. All this energy should be put into contributing towards to the project, testing, helping out community. Well, I used to agree. But when a bug report filed in December goes untouched entering April, which I don't recall happening prior to RH subsuming the project, it takes away impetus to ever file one again from lowly end users like me I think. http://bugs.centos.org/view.php?id=7972 Thanks for drawing my attention to that bug. I encountered it the other day after switching from runlevel 5 to 3 (and back again) on a CentOS 6.6 machine. The purpose of the runlevel switch was to restart gdm. Is there a better way? -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 7.1 user login screen can't scroll up/down
Can you use the page-down and arrow keys to navigate the list? Which Display Manager ( [kxg]dm ) are you using? Try a different one if the keyboard navigation does not work. On 04/09/2015 09:17 AM, Ole Holm Nielsen wrote: After we upgraded our CentOS 7.0 desktops to CentOS 7.1, a critical error in the graphical login screen has appeared on all 7.1 machines: We have 100+ users defined in /etc/passwd, and a list of names is presented on the initial login screen. However, it's impossible to scroll up or down in this user list to select the desired user. The middle mouse button seems to be disabled, so scrolling has become impossible! One can use the left and right mouse buttons to select one of the users in view, but no one else. This seems definitely to be a critical bug in CentOS 7.1. Workarounds: 1. Log in non-graphically using Ctrl-Alt-F2, then run the command startx. 2. Trim down /etc/passwd to 1 (or a few) relevant users. -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] IP aliases for services (including dhcpd)?
Yes confusion will abound. There should only ever be one and only one DHCP server on any network. With two you will sooner of later have multiple DHCP client hosts with the same IP addresses. On 04/22/2015 03:36 PM, Les Mikesell wrote: I'd like to consolidate the services from several old servers onto 2 CentOS7 VMs that are currently running dhcpd in a balanced/failover configuration. It will simplify things to add the IPs from the old servers as aliases, at least temporarily so everything will continue to connect without changes. However, after adding the first one, I see in the logs that DHCPD is sending its DHCPACKs alternating between ens192 and ens192:0 every other time, but oddly it is always using the non-alias IP as the source every time according to tcpdump -n. Is this configuration likely to confuse anything? -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Rsync and differential Backups
I beg to differ. The rsync command is a fantastic backup system. It may not meet your needs, but it works really great to make different types of backups for me. I have a script I use (automate everything) to perform nightly backups with rsync. Using rsync with USB external hard drives works far better than any other backup system I have ever tried. As for your other statements, they may be meaningful to you and that is OK, but to me are just so much irrelevant semantics. If one's backup system works, terminology and which commands used to achieve it are beside the point - it is a true backup system. On 11/09/2015 12:59 PM, John R Pierce wrote: On 11/9/2015 9:50 AM, Gordon Messmer wrote: I don't see the distinction you're making. a incremental backup copies everything since the last incremental a differential copies everything since the last full. rsync is NOT a backup system, its just a incremental file copy with the full/incremental/differential approach, a restore to a given date would need to restore the last full, then the last differential, then any incrementals since that differential, for instance, if you do monthly full, weekly differential and daily incrementals.If you don't use differentials, then you'd have to restore every incremental since that last full, which in a monthly full, daily incremental scenario could be as many as 30 incrementals. -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] getting X started...
For CentOS 5 or 6, edit /etc/inittab to default runlevel 5. For CentOS 7, in the */etc/systemd/system *directory, Remove the existing default.target link. An error will occur while attempting to create the new link if you do not do this.Run the following command to generate a new link to the desired run target. * * *systemctl enable graphical.target * * * On 12/01/2015 05:04 PM, Fred Smith wrote: I've got a new VM installed for me by a sysadmin who apparently did a minmal install. As a result I've installed a bunch of things to try to get X going, including yum groupinstall "development and creative workstation", "Desktop platform" "mate desktop" but so far I've not found the incantation to get it to start up X at boot time. As far as I can tell, it doesn't even try. Once I log in, startx works fine. Can someone point me to whatever it is I'm missing here? thanks! -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Setting up PXE server
Ooops. Sent from wrong address.
Have you tried this:
http://www.databook.bz/?page_id=9
On 12/17/2015 06:50 PM, david wrote:
Folks
On a lark, I am trying to set up a PXE server so I can use network
boots to load new computers {some of which are virtual) at home. It's
more of an intellectual exercise than a work necessity. I've read
several "how to" documents, and even the one on the RedHat site
doesn't help. (For example, it refers to /etc/xinet.d instead of
/etc/xinetd.d, and the careless references continue elsewhere.)
My goal is to make it possible to load a computer using network boot
with the equivalent of the "net-install" of Centos 7. My gateway
computer serves as a DHCP and (internal) DNS server for my in-house
machines. Are there any good references, or working examples I could
look at?
My gateway is running Centos 6, but I'm hoping the model will work
when I convert the gateway to Centos 7.
Thanks
David
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
--
*
"I'd put my money on the sun and solar energy. What a source of power! I
hope we don't have to wait until oil and coal run out before we tackle
that."
- Thomas Edison, in conversation with Henry Ford and Harvey Firestone,
1931
*
David P. Both
*
This communication may be unlawfully collected and stored by the National
Security Agency (NSA) in secret. The parties to this email do not
consent to the
retrieving or storing of this communication and any related metadata, as
well as
printing, copying, re-transmitting, disseminating, or otherwise using
it. If you
believe you have received this communication in error, please delete it
immediately.
--
*
David P. Both, RHCE
Millennium Technology Consulting LLC
Raleigh, NC, USA
919-389-8678
db...@millennium-technology.com
www.millennium-technology.com
www.databook.bz - Home of the DataBook for Linux
DataBook is a Registered Trademark of David Both
*
This communication may be unlawfully collected and stored by the National
Security Agency (NSA) in secret. The parties to this email do not
consent to the
retrieving or storing of this communication and any related metadata, as
well as
printing, copying, re-transmitting, disseminating, or otherwise using
it. If you
believe you have received this communication in error, please delete it
immediately.
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] (OT) Computer seems to have died
Power supply On 01/04/2016 07:03 PM, tdu...@palmettoshopper.com wrote: Hello, I have an old IBM Netvista. Lately, it would seem to go into sleep mode but I have all that disabled. I would have to power off to wake it up. Now I think its done. I can't even get to the CMOS/BIOS. The power light is on but no beeps or anything spinning up. I have two of these Netvistas and had put on away when I upgraded one of the machines. I pulled the HD from it and installed it in the other. Same thng. I'm fairly certain it was working when I updraded. I've swapped out monitors as well. Power supply or hard drive, any ideas? TIA ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] heads up: /boot space on kernel upgrade
+1 Valeri. I agree that things have changed a lot! However, Devin, the answer to your question is that the /boot partition is a necessity in a LVM environment, which everything else is by default. The /boot partition cannot be a logical volume; it must be a raw disk partition with an EXT[34] file system. On 02/13/2016 03:19 PM, Valeri Galtsev wrote: On Sat, February 13, 2016 5:57 am, Timothy Murphy wrote: Devin Reade wrote: I have a CentOS 6 machine that was initially installed as CentOS 6.4 in May of 2013. It's /boot filesystem is 200M which, IIRC, was the default /boot size at the time. As a matter of interest, is there any advantage today in having a /boot partition? I thought it went back to the days when the boot-loader had to be near the beginning of the disk? It is interesting to observe how perceptions are changing over time. Decade or two ago we were partitioning small then drives (thus loosing some of the space) just to separate regular users from those places vital for secure and reliable running of the system. Security. There days I bet there will be multiple experts who will bag me to death if I will try to offer any pro partitioning argument. This is just a very interesting (for me) observation. Valeri Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RasPi 3.x and RH-based Distro (Slightly OT)
+1 I just today installed CentOS Userland on a Raspberry Pi 2B and have started using it as a firewall. It is fast and really works perfectly for this use case. I have an HDMI to VGA adapter and a PS/2 mouse/keyboard to USB adapter to connect to my 16 port KVM switch. I use a Gb Ethernet dongle for the internal network and connect the on-board NIC to the external network. I have a few more tools I want to install, because the CentOS ARM image is very minimal. And not everything I would like is available on the repo, but enough to make this very workable for me. https://wiki.centos.org/SpecialInterestGroup/AltArch/Arm32 I hope this helps. On 02/29/2016 01:26 PM, Karanbir Singh wrote: On 29/02/16 17:59, Benjamin Smith wrote: With the release of the Rasberry Pi 3.x, I think we have a platform I could jump on board with. Performance has just been lacking until now! But I really don't want to jump the "RH ship" - I'd rather stick with an environment I am comfortable in. Can anybody comment here on the best way to run RHEL/Fedora/CentOS on a RasPi, or if there's even a useful port? join the arm-dev list ( https://lists.centos.org ) CentOS has a great story across the entire ARMv7 and v8 platform, with every major vendor in the ARM 64bit platform working with us. We say the rpi3 release this morning and are going to work on a bringup to match our rpi2 images. However, we will also be doing a 64bit image, based on CentOS Linux 7/aarch64 release regards -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] meminfo
GUI: gkrellm, kinfocenter, ksysguard, and numerous widgets for the KDE Plasma desktop. CLI: top, atop, htop, glances And there are more for each category. On 04/11/2016 06:26 AM, Hadi Motamedi wrote: Dear All As far as I know , to check for the amount of installed RAM on my centos server I checked it as: #more /proc/meminfo Can you please let me know how can I check for the instantaneous occupied amount of my RAM the similar way the task manager shows it on my Win server ? Thank you in advance ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6.4 installation fails with message "No usable disks have been found"
Specialized storage devices are NAS or other remote storage array types of devices. So that is not a valid option on your stand-alone system. It looks like your hard drives are visible to the Linux Anaconda installer, but you may want to check BIOS configuration and verify that they are configured correctly there. Unplug the power connectors to the drives and reseat them, and data cables from both ends and reseat those as well. Ensure that the jumpers on these parallel ATA drives aer set soi one is "Master" and one is "Slave." Other options may work, but also may not. The "CS" option is to be avoided. Be certain that the Master is the drive you want to be /dev/sda and the Slave will be /dev/sdb. Based on my experience the jumpers on the hard drives are the most likely cause of this problem. AFAIK, there are no "special" steps to install CentOS on any particular local hard drive. So long as BIOS and jumpers are correct, it should "just install." On 04/06/2014 09:25 AM, Meikel wrote: > Hi folks, > > I inherited a very old computer (I guess about 8 years old) which I'd > like to use for some training on CentOS. I downloaded images for CentOS > 6.4 i386 (DVD 1 and 2) and burned them onto discs. After inserting DVD 1 > into drive and booting, on the "Welcome to CentOS 6.4!" screen I select > "Install or upgrade an existing system". I then skip the media test and > start the installation. Then I get a graphical installer where I choose > english language and U.S. international keyboard layout. > > Then I'm questioned about "What type of devices will your installation > involve"? where I select "Basic Storage Devices" and then proceed. I get > a dialog "Examining devices" with the message "Examining storage devices". > > After a short while a dialog "No disks found" appears displaying the > message "No usable disks have been found". I then go back and choose > "Specialized Storage Devices" but I then get the same result (no devices > are found). > > Just to be sure that there are disks available and hardware works I > installed a current Debian which works fine. From the BIOS and from > Debian shell command "dmesg | grep -i ata" I see that there are two > "Maxtor 6Y120L0" installed. Find output of "dmsg" below that email. > > Is it possible and what steps are necessary to install CentOS 6.4 on > that "Maxtor 6Y120L0" hard disks? > > Regards, > > Meikel > > --- > > > > Output of "dmesg | grep -i ata" > > [1.690559] pata_via :00:11.1: version 0.3.4 > [1.690591] pata_via :00:11.1: can't derive routing for PCI INT A > [1.693019] scsi0 : pata_via > [1.693396] scsi1 : pata_via > [1.694434] ata1: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xa800 > irq 14 > [1.694442] ata2: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xa808 > irq 15 > [1.864541] ata1.00: ATA-7: Maxtor 6Y120L0, YAR41BW0, max UDMA/133 > [1.864549] ata1.00: 240121728 sectors, multi 16: LBA > [1.864737] ata1.01: ATA-7: Maxtor 6Y120L0, YAR41BW0, max UDMA/133 > [1.864744] ata1.01: 240121728 sectors, multi 16: LBA > [1.880389] ata1.00: configured for UDMA/133 > [1.896439] ata1.01: configured for UDMA/133 > [1.896738] scsi 0:0:0:0: Direct-Access ATA Maxtor 6Y120L0 > YAR4 PQ: 0 ANSI: 5 > [1.897477] scsi 0:0:1:0: Direct-Access ATA Maxtor 6Y120L0 > YAR4 PQ: 0 ANSI: 5 > [2.068361] ata2.00: ATAPI: HL-DT-ST DVDRAM GSA-4167B, DL11, max UDMA/33 > [2.068375] ata2.01: ATAPI: CD-956E/AKV, A99, max UDMA/33 > [2.084228] ata2.00: configured for UDMA/33 > [2.100283] ata2.01: configured for UDMA/33 > > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- > > > * > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re-mount a drive using its label name
"Hard" removal? What the heck is that!? ***ALWAYS*** umount a drive before removing it. Clearly you are experiencing the side effect of and are a good example for the bad things that can happen when one does not umount a drive before removing. On 05/16/2014 02:30 PM, Mauricio Tavares wrote: > On Fri, May 16, 2014 at 2:03 PM, Raghuv Adhepalli > wrote: >> @mark: I didn't umount the drive before removing. Was performing hard >> removal. >> I will try clearing the concerned UUID and see if that mounts the drive >> back. >> >As an alternative, I think you can change the UUID of a device. > >> Raghuv. >> >> >> On Fri, May 16, 2014 at 11:59 AM, wrote: >> >>> Raghuv Adhepalli wrote: >>> >>>> @mark: This is my dmesg output, >>>> >>>> XFS (sdf): xfs_log_force: error 5 returned. >>>> sd 0:0:9:0: [sdj] Synchronizing SCSI cache >>>> sd 0:0:9:0: [sdj] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK >>>> mpt2sas0: removing handle(0x000e), sas_addr(0x443322110500) >>>> XFS (sdf): xfs_log_force: error 5 returned. >>> >>> sdj: unknown partition table >>>> sd 0:0:10:0: [sdj] Attached SCSI disk >>>> XFS (sdj): Filesystem has duplicate UUID >>> >>> This concerns me. As I asked, you *did* umount the drive before removing >>> it? I would expect that to remove the UUID from /dev/disk/by-uuid; for >>> some reason, it's clearly still there, and I think that's what's confusing >>> the system. >>> >>> mark >>> >>> ___ >>> CentOS mailing list >>> CentOS@centos.org >>> >>> https://urldefense.proofpoint.com/v1/url?u=http://lists.centos.org/mailman/listinfo/centos&k=2a4Akkj3oY%2FOkjwft1MTMw%3D%3D%0A&r=tMZHZRUDG2%2BTRwBxuWe2n5rPULoPCwzzTu%2BUi79RuVM%3D%0A&m=tXDizAMl3RlLtrBcA8DEk%2B6XsJ032GhcgvkpKDNtP1c%3D%0A&s=6ba4bf4e62a08e2c22efa41963aa238bddc0b41b6d00322d8deae79962c86e83 >>> >> ___ >> CentOS mailing list >> CentOS@centos.org >> http://lists.centos.org/mailman/listinfo/centos > _______ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- > > > * > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Analyzing the MBR
The dd command shows you **exactly** what is in the MBR and, if you want, the following sectors. But the following sectors are not particularly relevant to boot. THe MBR contains the boot record and the partition table. There is not room for anything else. But your problem is not with the MBR so the solution does not lie there. Although you have already reinstalled, you might have recovered by changing the boot order of the hard disks in the BIOS configuration for your computer. Most computers have that capability these days. You might also have booted to a recovery disk (most install DVDs have recovery mode as a menu option) and noted the sequence in which the drives were recognized by BIOS by using the dmesg command. Perhaps you plugged the drives back into different locations on the bus. Are they PATA or SATA? As far as what appears to be your original problem, discovering information about a hard drive, the smartctl command can give you plenty of information about a drive even if it is not in the database. You just need to use the -a or -x options. You could also have used fdisk -l /dev/ to display the basic capacity information about the drive. And the dmesg command can also give you information about your hard drives and the way the kernel sees them before you need to use rescue mode. I hope this helps a bit for future issues. On 06/05/2014 07:01 AM, Timothy Murphy wrote: > Is there any tool for analysing the MBR on a computer? > I know one can just dd it and see roughly what it contains. > But surely one should be able to work out the exact content > of the MBR and the neighbouring sectors read at boot time? > > I had a difficult day, probably due to my ignorance, > which would have been solved at once by such a tool. > I had taken one of three hard disks out of my home server > (to see exactly what it was, as smartctl said it was not > in its database) and this had the effect of altering > the order of the disks in the BIOS, preventing re-booting. > > It was only after I had re-installed CentOS in a spare partition > that I realized what had happened. > Incidentally, before this I had tried > what I take to be the standard way of solving this problem, > by running a CentOS Live USB stick, mounting the root partition > and trying to chroot to this, but that did not work - > chroot on the stick would not run, > and neither would chroot on the disk. > > I'm wondering if there was some other method I could have tried? > For example, I tried running a Fedora netinstall USB stick, > which has a "Try to repair the system" option in Troubleshooting. > This saw the system OK, but did not have grub-install on it. > As far as I could see, none of the CentOS install disks > has such a tool on it? > > > > > -- > > > * > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where to change login screen options
Switch to KDM instead of GDM as the default display manager. This will change the login screen and require typing a username which is much more secure. It will not change your desktop but you may have to select GNOME or KDE the first time you log in if you have both installed. On 06/06/2014 10:34 AM, Wes James wrote: > I've looked around in the menus and googled this, but I can't find a way to > make the login require a username instead of just showing the available users > to select from. Where do I change this? I'm using CentOS 6.5. > > Thanks, > > -wes > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- > > > * > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Cemtos 7 : Systemd alternatives ?
On 07/07/2014 08:46 PM, Robert Moskowitz wrote: > On 07/07/2014 07:47 PM, Always Learning wrote: >> Reading about systemd, it seems it is not well liked and reminiscent of >> Microsoft's "put everything into the Windows Registry" (Win 95 onwards). >> >> Is there a practical alternative to omnipresent, or invasive, systemd ? >> > So you are following the thread on the Fedora list? I have been > ignoring it. > > Best I can tell is learn it and use it. And if you have any services, > fix them so that they work with systemd. I work with one that does not > and it is very slow to complete its startup. > As far as I know there is no going back to SystemV at this point and I am fine with that. systemd is just fine. It has been around on Fedora for a few releases now. It is quite compatible with old SystemV start scripts and systemd simply uses the SystemV start scripts as configuration files to start those services. What you are probably seeing is the result of a side effect of the new systemd strategy. systemd only starts services when they are actually needed. systemd does this by simply creating a socket on which it listens for requests for that service. The service is only started when a request is made to that socket. Of course some services are up and running from the beginning, but those not needed are left to load and start when a request is made on the socket for that service. So the delay in starting your SystemV service means that your service is waiting for a reply from a service on which it depends and which has not yet been started. systemd receives the request from your service on the socket intended for the service yours is requesting. systemd then starts that service and returns the result - after a bit of a delay - to your SystemV service. After the first request to the systemd managed service, there should be no further delays. Unless the service is seldom used and systemd determines it can remove the service from memory with minimal impact. I like systemd a lot. I still like SystemV a lot, too. I have a page on one of my web sites that does not explain systemd, but rather provides a number of very good links that do explain it - in morbid detail. These links also discuss the philosophy behind the change. Good reading! http://www.databook.bz/?page_id=2578 The latest Fedora documentation has good information about using systemd to manage services and managing and configuring systemd itself. > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- > > > * > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Cemtos 7 : Systemd alternatives ?
I still prefer IPTables, so in Fedora I simply disabled firewalld and enabled IPTables. No need to uninstall. I have read that IPTables will continue to be available alongside firewalld for the unspecified future. Note that IPTables rule syntax and structure have evolved so your ruleset may need to be updated. I did find that the current version of IPTables will actually convert old rulesets on the fly, at least as far as the syntax of the individual rules is concerned. From there you can simply use iptables-save to save the converted ruleset. One of the items on my tudo list is to learn firewalld. The switch from ipchains took a bit of learning and I expect this switch will as well. One of the stated reasons for firewalld is that dynamic rule changes do not clear the old rules before loading the new ones, to paraphrase, "where IPTables does." If true, that would leave a very small amount of time in which the host would be vulnerable. I have no desire to peruse the source code to determine the veracity of that statement, so if there is someone here who could verify that changing the rules in IPTables, whether using the iptables command or the iptables-restore command, I would be very appreciative. No need to go to any trouble to locate that answer as I am merely curious. Thanks! On 07/08/2014 08:00 AM, Dennis Jacobfeuerborn wrote: > On 08.07.2014 09:12, Ljubomir Ljubojevic wrote: >> On 07/08/2014 03:41 AM, Always Learning wrote: >>> On Mon, 2014-07-07 at 21:34 -0400, Scott Robbins wrote: >>> >>>> No systemd in FreeBSD. It isn't Linux, and like any O/S, has its own >>>> oddities. >>>> >>>> It would take more adjustment, IMHO, to go from CentOS 6.x to FreeBSD than >>>> to go to 7.x. (I'm saying this as someone who uses both FreeBSD and >>>> Fedora which has given a hint of what we'll see in CentOS 7.) >>> Thanks. I've deployed C 5.10 and C 6.5. Thought I'll play with C 7. >>> >>> I notice, from http://wiki.centos.org/Manuals/ReleaseNotes/CentOS7, the >>> apparent replacement of IPtables by firewalld >>> >>> https://fedoraproject.org/wiki/FirewallD >>> >>> >> Check "Static_Firewall" Chapter: >> https://fedoraproject.org/wiki/FirewallD#Static_Firewall_.28system-config-firewall.2Flokkit.29 >> >> and one below it. You can have iptables rules and also rules from >> system-config-firewall >> > If you want to avoid firewalld for now you can uninstall it and instead > install the iptables-services package. This replaces the old init > scripts and provides an "iptables" systemd unit file that starts and > stops iptables and if you require the old "service iptables save" > command you can reach that using "/usr/libexec/iptables/iptables.init". > > Also if you want to keep NetworkManager on a Server you can install the > NetworkManager-config-server package. This only contains a config chunk > with two settings: > no-auto-default=* > ignore-carrier=* > > With this package installed you get a more traditional handling of the > network. Interfaces don't get shutdown when the cable is pulled, no > automatic configuration of unconfigured interfaces and no automatic > reload of configuration files (the last one doesn't require the package > and is now the NetworkManager default behaviour). > > Regards, >Dennis > > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- > > > * > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 1stboot stuff?
Nothing breaks. Nothing stops working. I do this all the time. I almost never login to a local console after the initial reboot of a newly installed system, either Fedora or CentOS. In fact I have a post-install script that turns off the firstboot service and terminates it if it is already running - that in addition to many other customization tasks that I perform on every Linux box I install. You could then uninstall the firstboot RPM if you choose. On 07/11/2014 01:35 PM, Les Mikesell wrote: > Will anything break if you never log into the console after the > initial reboot? I just installed my first copy in a VM, and connected > over ssh as I normally would for all access after the install. But I > just happened to leave the console window open and later noticed that > it was prompting for license acceptance which I didn't see in the ssh > login.On a more typical install, no one will ever log in at the > console after the network is up. Will that matter, and is there a > way to keep it from confusing operators that might need to log in with > a crash cart much later? > > > -- > > > * > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Install php-imap using yum or any on CentOS 7
And, of course, this brings up the question of when EPEL Beta (7) and RPMFusion will be ready for CentOS 7. Can anyone make a comment on that? I am waiting for EPEL and RPMFusion before upgrading some of my hosts. On 07/30/2014 07:50 AM, Thomas Göttgens wrote: > Don't use EPEL6 with CentOS 7. > > > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- > > > * > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 7 as gateway - UDP performance is busted/awful?
Nope. The kernel is not busted. You just need to add a few rules to your firewall in order to tell it to forward the packets appropriately. While you do need "net.ipv4.ip_forward = 1" line in /etc/sysctl.conf, and you also need to set /proc/sys/net/ipv4/ip_forward to 1 if you have not rebooted after setting the line in sysctl.conf, firewall rules are required to make it work. Unfortunately the specific firewall rules you require will depend upon the release level of the distribution you use. IPTables has changed a bit over the years and so the specific rules and their syntax has changed as well. Here is what I use now with CentOS 6.5+ on my own network. # Generated by iptables-save v1.4.7 on Fri Aug 15 09:11:28 2014 *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [825:47118] :fail2ban-SSH - [0:0] -A INPUT -p tcp -m tcp --dport 22 -j fail2ban-SSH -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -i eth+ -j ACCEPT -A INPUT -p tcp -m conntrack --ctstate NEW -m tcp --dport 22 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A FORWARD -p icmp -j ACCEPT -A FORWARD -i lo -j ACCEPT -A FORWARD -i eth0 -j ACCEPT -A FORWARD -i eth1 -j ACCEPT -A FORWARD -j REJECT --reject-with icmp-host-prohibited -A fail2ban-SSH -j RETURN COMMIT # Completed on Fri Aug 15 09:11:28 2014 # Generated by iptables-save v1.4.7 on Fri Aug 15 09:11:28 2014 *nat :PREROUTING ACCEPT [80965:6238336] :POSTROUTING ACCEPT [37811:2251658] :OUTPUT ACCEPT [838:63592] -A PREROUTING -d 24.199.159.56/29 -p tcp -m tcp --dport 80 -j DNAT --to-destination 192.168.0.53:80 -A PREROUTING -d 24.199.159.56/29 -p tcp -m tcp --dport 25 -j DNAT --to-destination 192.168.0.53:25 -A POSTROUTING -s 192.168.0.0/24 -j MASQUERADE COMMIT # Completed on Fri Aug 15 09:11:28 2014 The FORWARD rules in the filter table allow forwarding from your internal networks on eth0 and eth1 to the outside world. The Destination NATing PREROUTING rules allow incoming packets for SMTP and HTTP to be routed to the appropriate server on my inside network. I hope this helps. On 08/15/2014 07:50 AM, Tom Horsley wrote: > I think I have my answer: The kernel is busted (or something > isn't loaded that I need, but don't know about :-). > > I copied my Fedora 20 desktop 3.15.8-200.fc20.x86_64 kernel > and /lib/module files to the centos7 KVM host, rebuilt > grub.cfg, and rebooted into the 3.15.8-200 kernel, and > with no other changes the UDP packet forwarding is now working > perfectly. > > I guess it is time to make yet another bugzilla account > and submit a bug... > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos -- * "I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that." - Thomas Edison, in conversation with Henry Ford and Harvey Firestone, 1931 * David P. Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. -- * David P. Both, RHCE Millennium Technology Consulting LLC 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5 takes one second holding each keyboard key until it shows.
This has happened to me in the past. It is not an OS problem, it was for me a hardware issue. One or both of two things may be causing this problem. Some USB keyboards require more power than others. My USB keyboard would exhibit these same symptoms when plugged into a hub that was powered only by the computer itself or another hub. So my particular USB keyboard must be plugged into a hub that has its own power supply. Also, I have found that some USB keyboards are especially likely to exhibit these same symptoms when plugged into an unpowered USB 3 port. Login remotely via SSH never exhibited any of these keyboard symptoms. Perhaps this is the cause of your problem as well. On 08/28/2014 04:30 AM, Reinhard Dunkel wrote: > On 08/27/2014 06:07 PM, SilverTip257 wrote: >> On Tue, Aug 26, 2014 at 10:54 PM, Reinhard Dunkel >> wrote: >> >>> I used CentOS 5 for years. Suddenly, it takes one second holding a >>> keyboard key until it shows on the screen: >>> >>> >> Is this system accessible via SSH? >> Does the behavior only happen when using the physical keyboard? >> >> Might it be out of physical memory (RAM) and swapping violently? >> Disk thrashing of this sort can cause rather irritating delays. >> >> Or maybe a failing or failed drive? (Assuming you could have a hardware or >> software RAID setup) > Does CentOS now only support user request tracking by email? I cannot > find this thread on the CentOS web site... > > My computer has 4 GB Patriot memory - the maximum amount the motherboard > allows. Using command "top" shows less than one percent of CPU and > memory are in use. The computer is idle. I am using a 1 TB WD disk for > CentOS 5 and a 2 TB Seagate disk for CentOS 7. No RAID. > > On CentOS 5, I use command "su" to show a root shell. On CentOS 7, su no > longer works and I use "ssh root@localhost" instead. (I have not tried > SSH to access my CentOS systems remotely yet.) > > Concerning a previous comment: I did not modify the hardware likely > causing this problem. I only have to switch between both disks - > described above - to boot CentOS 5 or CentOS 7. My suspicion is "yum > update" using numerous official and unofficial "repos" installed > something causing this challenge. The login screen of CentOS 5 for user > name and password still works fine. By the way, we develop software > (NMRanalyst) and I try to keep a CentOS 5 system alive so we can test on > it to claim our software is supported on it. When I don't get further > suggestions, I likely re-install another disk with CentOS 5 - this time > using only official repos. > > ThanX for all suggestions! > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- > > > ***** > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] mairadb doesn't prompt for user/pass
MariaDB is just a fork of MySQL so the code is the same. Over time it will diverge but under control of the community rather than Oracle. On 08/31/2014 12:43 AM, Tim Dunphy wrote: >> my.cnf doesn't have the passwords. When you first set up mysql, you use >> the mysqladmin command to set the root password. >> MariaDB doesn't handle the initial set up any differently than MySQL. >> man mysqladmin >> C7 does do some stuff differently with the config as the "real" config >> files are in /etc/my.cnf.d /etc/my.cnf includes those files to build a >> config. > > Cool thanks. That worked! I was going in with the initial login with no > password prompt and setting up the root user with the 'create user' > command which didn't work. The traditional mysql approach did. Thanks > again! > > > On Sat, Aug 30, 2014 at 11:44 PM, Steven Stern < > subscribed-li...@sterndata.com> wrote: > >> On 08/30/2014 10:12 PM, Tim Dunphy wrote: >>> Hello, >>> >>> I discovered today that CentOS 7 has replaced MySQL with MariaDB. Which >> is >>> fine, it's seems really similar. And I was already aware that it was >>> written by the original team that wrote mysql. >>> >>> It's cool that the mysql command still gets you in! >>> >>> This is the version I have: >>> >>> [root@web1:~] #mysql --version >>> mysql Ver 15.1 Distrib 5.5.37-MariaDB, for Linux (x86_64) using readline >>> 5.1 >>> >>> But for some reason all I have to do is type the word 'mysql' to get me >>> into the database. >>> >>> That's ok for initial setup I guess. But once I was in a did away with >> all >>> the accounts that either had blank set for the username, and updated all >>> the accounts to use passwords. >>> >>> MariaDB [mysql]> select User,'@',Host,Password from user; >>> +---+---+---+---+ >>> >>> | User | @ | Host | Password | >>> >>> +---+---+---+---+ >>> >>> | root | @ | localhost | *8328225AE4A663FAKEFAKEFAKEFAKEFAKE93D61 | >>> >>> | root | @ | web1 | *8328225AE4A663FAKEFAKEFAKEFAKEFAKE93D61 | >>> >>> | root | @ | 127.0.0.1 | *8328225AE4A663FAKEFAKEFAKEFAKEFAKE93D61 | >>> >>> | admin | @ | localhost | *8328225AE4A663FAKEFAKEFAKEFAKEFAKE93D61 | >>> >>> +---+---+---+---+ >>> >>> 4 rows in set (0.00 sec) >>> >>> I also did a search from root to find any my.cnf files and didn't find >> any >>> that has user accounts in them. >>> >>> Also I find that for the root accounts I can't seem to login even if I >> set >>> the password in the database without encryption and copy/paste the >> password >>> into the prompt. >>> >>> However the non-root account (admin) does let you in with the password. >>> >>> So I'm wondering how to secure mariadb so that it doesnt' let you in >>> without typing in a username and password and also why it doesn't let you >>> log in as 'root'? Is the root account disallowed from logging in by >> default? >>> Thanks >>> Tim >>> >> >> my.cnf doesn't have the passwords. When you first set up mysql, you use >> the mysqladmin command to set the root password. >> >> MariaDB doesn't handle the initial set up any differently than MySQL. >> >> man mysqladmin >> >> C7 does do some stuff differently with the config as the "real" config >> files are in /etc/my.cnf.d /etc/my.cnf includes those files to build a >> config. >> >> >> >> -- >> -- Steve >> ___ >> CentOS mailing list >> CentOS@centos.org >> http://lists.centos.org/mailman/listinfo/centos >> > > > > -- > > > * > David P. Both, RHCE > Millennium Technology Consulting LLC > 919-389-8678 > > db...@millennium-technology.com > > www.millennium-technology.com > www.databook.bz - Home of the DataBook for Linux > DataBook is a Registered Trademark of David Both > * > This communication may be unlawfully collected and stored by the National > Security Agency (NSA) in secret. The parties to this email do not consent to > the retrieving or storing of this communication and any related metadata, as > well as printing, copying, re-transmitting, disseminating, or otherwise using > it. If you believe you have received this communication in error, please > delete it immediately. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Systemd sessions
Sessions of what? Posting log entries here would help. On 09/06/2014 08:01 AM, Timothy Murphy wrote: As a matter of interest, why does systemd start sessions every couple of minutes? And if it is completely standard, is it necessary to inform me of this in /var/log/messages? -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] daemon for nfs client
Try this: http://www.databook.bz/?page_id=246 On 09/25/2014 05:13 PM, Dan Hyatt wrote: In days of old, in Solaris there was a daemon for NFS Client, and NFS server (actually several including portmap...). I am unable to find reference to the daemon that runs NFS client But the RedHat Documentation does not explain the NFS client daemon. Is this a service or something else. on centos6.5 I previously posted about a really weird root filesystem. It started on another non critical server. so I found out when I unmounted the NFS filesystem the problem went away. BUT the NFS filesystem will not remount. On the non critical server, an old windows trick "reboot fixes everything" brought NFS and the mount up clean no problems But I want to try and fix this on the critical server without a reboot. Is there a way to stop and start the NFS client like I can restart the NFS server? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Need to Understand booting process of CENTOS-7
n't know how long you have been on this list, but it's a really friendly place. Has been, still is. To get a response like the one in this thread you have to "earn" it. In this case it's obvious that the OP is of that "please do my homework for me" type and didn't do any research of his own other than finding out there is something different. This is not friendly to the list and it's not good enough for a "senior" consultant. Ned's response was appropriate and actually quite friendly. Kai ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos laptop support
Many years ago I purchased a Dell Inspiron direct from Dell and had very similar issues, so it is not just WinBloze 8, it is that the systems are intentionally set up to make it difficult. Took me about 3 hours just to get to the BIOS because the window of time was less than 1 second to hit the right key combo. The last time I purchased a laptop was from Emperor Linux in Atlanta, GA. http://www.emperorlinux.com/ I purchased a Lenovo W500 from them a few years ago with my favorite flavor of Linux already installed. They have very good support and the owners are very helpful. They also have a very large selection of models and you can choose your own hardware configuration. I have long since installed more recent versions of Linux, including Fedora 20. The best thing about purchasing from them is that they have tested and configured each computer before they ship them. It is a few hundred $$ more expensive than purchasing from a local big box store. I imagine I would have spent many hours researching and testing before I purchased, and then some additional time getting Linux installed and running on anything I purchased. As a business owner of a Linux consulting and training company, I consider my time worth at least $100 per hour which is my basic hourly charge when consulting. So figure that purchasing from Emperor saved me way more than the additional cost I paid to them. Plus I did not have to pay the M$ tax. I have also helped customers with recent Acers that seem to work well with Linux. I hope this helps. On 10/02/2014 12:57 AM, Frank Cox wrote: Today I found myself in need of a laptop to run Centos on. And that simple statement led to an all-day odyssey. My original plan was to purchase a laptop and install Centos 6 on it. I went to Staples and tried booting it on every model of laptop that they had in the store. They all come with Windows 8 installed, and for the edification of anyone who doesn't know this (I didn't until today) you have to conduct a real song and dance to get to the bios settings on one of those things: boot windows move mouse pointer to the top right corner of the screen move down to setting menu (gear) that shows up click on power off icon Hold shift key and left-click on "restart" it goes to the troubleshooting screen click on advanced troubleshooting click on "change uefi settings" now we get to the bios set secure boot off set legacy boot priority And then you can boot from a USB flash drive. *whew* (It's easy to put it back afterward, just go into the bios and tell it set to defaults, save and exit.) Anyway, I tried booting a Centos 6 Live CD image on a usb flash drive on every single model of laptop they had in stock and no joy on any of them -- they either hung altogether, started booting and hung at some point along the way, started a continuous cycle of start booting, reset, start booting again, or kernel panicked. Every last one. I then tried a Centos 7 Live CD image on another usb flash drive and then the third machine that I tried it on (Lenovo Ideapad S400 Touch) worked. So I bought that one and have now wiped Windows off of its hard drive and installed Centos 7 so it now looks and acts like a real computer. I never would have thought that it would take all bloody day to purchase one laptop. (And I'm going to be having nightmares about that Windows Boot Manager thing.) Since it has now become amazingly difficult to get a laptop if you're not planning to use Windows, at least around here, I'm wondering what the rest of you fine folks do when it comes to purchasing a laptop? Next time this comes up, I'd rather not have to spend all day on something that used to take fifteen minutes. -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] slammed
I use Fail2Ban which is available from the EPEL repo to ban these addresses. Works well for SSH attacks by skriptkiddies as well. I usually block an address for 8 hours. On 10/02/2014 10:29 AM, Mike Burger wrote: On 2014-10-02 10:23 am, Jerry Geis wrote: I just got SLAMMED with accessed to httpd from 91.230.121.156 I added the address to my firewall to drop it. FYI host 91.230.121.156 156.121.230.91.in-addr.arpa domain name pointer no-rdns.offshorededicated.net. Are you running Wordpress? My company's Wordpress installation was getting hammered by an IP in the same netblock, yesterday...look in your httpd logs for repeated POST operations to xmlrpc.php. -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] ssh & ksh question
Try: ssh system2 "`cat test.script`" That works for me. On 08/09/2016 01:35 PM, m.r...@5-cent.us wrote: I need to run a report, source file on system 1, on system 2. I'd like to do this in one script, not have a second script to run it. Now cat script | ssh system2 works fine. But no matter what I've tried, it gags on ssh system2 <https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Stupid vim question
I have never run into this directly in vim for my uses, but it appears
to me to be a syntactical coding plugin to condense related code blocks
such as functions like GVim does. I think this is called code folding.
Try the following link.
http://stackoverflow.com/questions/170/collapse-comments-and-all-functions-in-vim-gvim
On 10/29/2016 05:39 PM, Alice Wonder wrote:
on very large files, vim will condense display - e.g.
+-- 8 lines: static inline void php_openssl_rand_add_timeval()
--
#endif
+-- 29 lines: static int php_openssl_load_rand_file(const char * file,
int *egdsocket, int *seeded)
---
+-- 22 lines: static int php_openssl_write_rand_file(const char *
file, int egdsocket, int seeded)
+-- 45 lines: static EVP_MD *
php_openssl_get_evp_md_from_algo(zend_long algo) {
--
+-- 42 lines: static const EVP_CIPHER *
php_openssl_get_evp_cipher_from_algo(zend_long algo) {
How do I get it to stop doing that? It didn't use to do that as far as
I remember, seems to be new to me in CentOS 7 - either that or I
previously had something in me .vimrc that prevented it and I just
forgot.
I have tried searching but I just can't seem to get the proper search
term to produce relevant results.
using it in a terminal shell, the only way I ever use it.
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
--
*
David P. Both, RHCE
Millennium Technology Consulting LLC
Raleigh, NC, USA
919-389-8678
db...@millennium-technology.com
www.millennium-technology.com
www.databook.bz - Home of the DataBook for Linux
DataBook is a Registered Trademark of David Both
*
This communication may be unlawfully collected and stored by the National
Security Agency (NSA) in secret. The parties to this email do not consent to the
retrieving or storing of this communication and any related metadata, as well as
printing, copying, re-transmitting, disseminating, or otherwise using it. If you
believe you have received this communication in error, please delete it
immediately.
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] tool for a comprehensive list of the storage structure
Try *lsblk -f* *[root@david ~]# lsblk -f NAME FSTYPE LABEL UUID MOUNTPOINT sda └─sda1 LVM2_member DWnNT0-aHQK-4zxn-cWIL-4iAQ-fboe-QaeyOK └─vg_Backups-Backups ext4Backups 97baf04c-5dbb-43bd-9e56-b1c23e623ae4 /media/Backups sdb ├─sdb1 ext4boot 7186c3bc-ef06-4d34-9caf-3813ec004fbb /boot └─sdb2 LVM2_member FU8VMi-xM65-2xvC-tK3R-gO91-QGkY-O4y7WN ├─david1-usr ext4usr 589c4eee-b3f7-4b68-9a20-f2d40b850798 /usr ├─david1-swapswap 9058afe6-43f3-4bcd-ba27-4a9f890cb295 [SWAP] ├─david1-rootext4root e2791469-362d-4c72-9172-c34b297886a0 / ├─david1-tmp ext4tmp 0c140bc8-0785-4ec1-bc96-3839d9a66da5 /tmp └─david1-var ext4var c9e9d413-66bd-498a-9ddd-e21de4858f60 /var sdcLVM2_member xVreaf-wkQ2-2rcS-2J8R-tj04-k2fW-D519iu ├─vg_david2-home ext4home f4ba78b4-e735-43ca-8e73-047d25e15220 /home ├─vg_david2-stuff ext4stuff b209b4ca-a016-4119-9941-fb4ef4102e06 /stuff ├─vg_david2-Virtualext4Virtual e74b2716-33a1-4339-95e7-6c63d64985aa /Virtual └─vg_david2-Pictures ext4Pictures 3c9f5705-2d6b-4c1f-9088-017c1f5c5891 /home/dboth/Pictures sdd └─sdd1 ext44T-Backup 2e5ab1a4-686b-4f16-b3fb-99df1e9eb76f sdeext3WD-500-USB 06237914-457a-4a4e-9312-597c8d06c0f1 └─sde1 ext4WD-500GB-USB 04fd97fe-d99b-4508-a968-e46b63c218b5 /run/media/dboth/WD-500GB-USB sdh └─sdh1 ext4USBbackup 65d7d09e-e5ea-499f-b694-15ea2dcb60c4 sr0 sr1udf WD SmartWare 4AFDFB0F * ** On 11/02/2016 11:54 AM, Leon Fauster wrote: I would like to have a smart cli tool, that shows a comprehensive list about the local storage structure: An output like: /srv /dev/mapper/luks-f85b7a2c-...: UUID="ca924fad-..." TYPE="ext4" /dev/mapper/vg_internal_e-lv_internal_srv: UUID="f85b7a2c-..." TYPE="crypto_LUKS" vg_internal_e /dev/md3: UUID="1Fi2Ex-..." TYPE="LVM2_member" /dev/sda4: UUID="00029bd4-..." UUID_SUB="d0024074-..." LABEL="e.ld:3" TYPE="linux_raid_member" /dev/sdb4: UUID="00029bd4-..." UUID_SUB="bf98fc79-..." LABEL="e.ld:3" TYPE="linux_raid_member" beside blkid any other tool available? -- Thanks, LF ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Server turns off unexpectedly
The lm_sensors package is required for the sensors module of glances to work. After installing lm_sensors, run sensors-detect. The sensors command will show the sensors detected and their current values. glances should then display the sensor readings. On 12/12/2016 06:37 AM, Gary Stainburn wrote: On Monday 12 December 2016 11:01:52 Nicolas Kovacs wrote: (first thing I'm going to do it buy a new keyboard, or employ a proof reader. Sorry for all the errors folks) First thing I would do is check the temperature. In my experience, excessive heat is the main reason for unexpected shutdown operations. I have had this in the past where either the CPU or PSU fan had died. I'll check both of these next time I'm on site, but I believe the PSU is fairly new anyway. I'm using the nifty Glances utility (available in EPEL) to do basic monitoring. If your server overheats, you'll gradually see your temperature indicator turn from green to purple and then to red. I know there are other utilities, but this is good for checking this sort of stuff in real-time. I installed Glance and had a look, but the sensors didn't show, even when I pressed 'S' as per the help page. Also, as this is a headless server, can anyone suggest a non-GUI monitor app? Cheers, Niki ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Server turns off unexpectedly
On 12/12/2016 07:29 AM, Gary Stainburn wrote: On Monday 12 December 2016 12:15:10 David Both wrote: The lm_sensors package is required for the sensors module of glances to work. After installing lm_sensors, run sensors-detect. The sensors command will show the sensors detected and their current values. glances should then display the sensor readings. Somewhere tucked in the back of my mind a memory is screaming no. Wasn't there a problem with lm_sensors where we were all told to remove / not install it because of serious problems with the package possibly even breaking things. Presumably that's no longer the case ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos If there was such a problem it is very far in the past or it only shows up on hardware I don't have. I have never had any problems with the lm_sensors package breaking things and I have been using it for years. -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] chronyd configuration as a local ntp server
AFAIK the only thing needed to make your host an NTP server using chrony is to set the allow line to the network address in CIDR format of the network you want to be served, and uncomment it. The restart chronyd. You also need to ensure that port 123 (NTP) is open to your internal network on your filrewall. I have a CentOS 6 box that is an NTP server for my network. CentOS 7 works the same way. On 12/27/2016 08:25 AM, Fred Smith wrote: On Mon, Dec 26, 2016 at 11:04:22PM -0500, Robert Moskowitz wrote: This is for centos 7 that has chronyd 2.1.1 I am looking into how to use chronyd as my local ntp server. On my old servers with ntpd I had local access control lines like: restrict 192.168.128.0 mask 255.255.255.0 nomodify notrap But in looking for documentation on chronyd I did not find anything on this at: https://chrony.tuxfamily.org/doc/2.1/manual.html In the actual /etc/chronyd.conf there is the sample line: # Allow NTP client access from local network. #allow 192.168/16 Does this allow only allow queries? Does chronyd support the 'restrict' option? Robert: Years back I used to use Chrony for that purpose (when I was running Smoothwall on an old PC instead of a commercial router, as I am now) and it did the job remarkably well. One of the designgoals of Chrony was to support networks or computers that are NOT connected full-time, so that time stayed somewhere near correct even if offline for hours or days. But that having been so long ago, now, I don't remember the details. I also don't remember what the "restrict" directive for ntpd does. (to give you an idea of how long ago that was it was when I had a Red Hat 7.2 or 7.3 workstation as my home PC--pre-RHEL. I could compile things on that RH box, tar up the necessary results and take that file to the smoothwall box and untar them and with small configuration: voila!) there used to be a chrony mailing list where one could ask such questions, but I haven't seen traffic on it in years, so it may no longer exist. Fred -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] chronyd configuration as a local ntp server
Here are the commands for that. Apparently restrict is replaced with deny. deny [] Deny access to subnet as a default deny all [] Deny access to subnet and all children On 12/27/2016 09:07 AM, Robert Moskowitz wrote: 'Modern' NTP allows for all sorts of updates to NTP servers, with all sorts of attacks. So to prevent even local hosts from making changes to your NTP server, there is the restrict instead of allow command. Its intent is to limit what the server will accept from a host in the address range instead of allowing any command from within that range. I use this on my Centos6 servers. I guess I will have to register to the chronyd list and ask there. thanks On 12/27/2016 08:49 AM, David Both wrote: AFAIK the only thing needed to make your host an NTP server using chrony is to set the allow line to the network address in CIDR format of the network you want to be served, and uncomment it. The restart chronyd. You also need to ensure that port 123 (NTP) is open to your internal network on your filrewall. I have a CentOS 6 box that is an NTP server for my network. CentOS 7 works the same way. On 12/27/2016 08:25 AM, Fred Smith wrote: On Mon, Dec 26, 2016 at 11:04:22PM -0500, Robert Moskowitz wrote: This is for centos 7 that has chronyd 2.1.1 I am looking into how to use chronyd as my local ntp server. On my old servers with ntpd I had local access control lines like: restrict 192.168.128.0 mask 255.255.255.0 nomodify notrap But in looking for documentation on chronyd I did not find anything on this at: https://chrony.tuxfamily.org/doc/2.1/manual.html In the actual /etc/chronyd.conf there is the sample line: # Allow NTP client access from local network. #allow 192.168/16 Does this allow only allow queries? Does chronyd support the 'restrict' option? Robert: Years back I used to use Chrony for that purpose (when I was running Smoothwall on an old PC instead of a commercial router, as I am now) and it did the job remarkably well. One of the designgoals of Chrony was to support networks or computers that are NOT connected full-time, so that time stayed somewhere near correct even if offline for hours or days. But that having been so long ago, now, I don't remember the details. I also don't remember what the "restrict" directive for ntpd does. (to give you an idea of how long ago that was it was when I had a Red Hat 7.2 or 7.3 workstation as my home PC--pre-RHEL. I could compile things on that RH box, tar up the necessary results and take that file to the smoothwall box and untar them and with small configuration: voila!) there used to be a chrony mailing list where one could ask such questions, but I haven't seen traffic on it in years, so it may no longer exist. Fred ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both * "I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that." - Thomas Edison, in conversation with Henry Ford and Harvey Firestone, 1931 * -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 7 httpd cgi script file not able to write to /tmp
The behavior you describe should be normal for any web server, as it is for Apache, which is what I use. It is a security feature that prevents malicious attacks on a web server from writing malware anywhere else in the filesystem and possibly gaining elevated privileges. On 01/20/2017 10:19 AM, Jerry Geis wrote: Fun fact... If I echo my data to the same directory as the script is located in it works. But it does not allow writing to /tmp I'm good with that. Thanks, Jerry On Fri, Jan 20, 2017 at 9:54 AM, Jerry Geis wrote: Hi - Thanks for the reply. I actually have selinux disabled on this box. Jerry ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Script not running correctly as cronjob
Do not forget that cron does not use the root environment, such as
$PATH. You need to set up the exect environment you need in the
beginning of the crontab file. It would be helpful to see your crontab
file to know what environment it has set up.
Also the /var/log/cron log file should contain error information that
might be helpful.
On 02/01/2017 05:04 AM, Tony Mountifield wrote:
In article <86827d81f1944333ae213f2d3f198...@2sic.com>,
Daniel Reich wrote:
Hi
I have a script to resign all DNS zones every two weeks. When i run the script
from bash, it works like it should. But
when it is executed in cron not. Its starting normal as cronjob:
Feb 1 03:00:01 xxx CROND[20116]: (root) CMD (sh
/opt/dnssec/resign_dnssec_zones.sh)
But after i get a mail that everything is finsihed, but it isn't.
03:04:28 DNSSEC-Signierung abgeschlossen
The script deletes the old signed zones, but don't resign it. The mail is also
sent.
Below the script.
Anybody an idea why it doesn't work in cron?^
I cannot find any error in any log.
After the first line, add a line saying: set -x
Then set cron to run it and examine the output that gets mailed to you.
The -x tells it to echo each command it is about to execute. That will help
you to see how far it is getting.
Further comments below.
Cheers
Tony
Best regards
Daniel
#!/bin/bash
KSKDIR="/etc/named/KSK"
ZSKDIR="/etc/named/ZSK"
ZONEDIR="/var/named/chroot/var/named"
LOG="/var/named/chroot/var/log/dnssec_resign.log"
MAILREC="monitor@xx"
#delete old signed files
rm -rf $ZONEDIR/*.signed
#delete the old log
rm -rf $LOG
#read the zonefiles
ZONEFILES=$(ls -p $ZONEDIR | grep -v '/$' | grep -v 'dsset*')
for FILES in $ZONEFILES; do
#remove the .zone at the end
ZONE=$(echo "${FILES%.*}")
Why not just: ZONE=${FILES%.*}
#remove the old signed zone
rm -rf $ZONEDIR/$ZONE.signed
You deleted them all further up.
#Sign the zone
cd $ZONEDIR
Why not do this before the loop? Then you also don't need $ZONEDIR/ everywhere.
dnssec-signzone -o $ZONE -k $KSKDIR/K$ZONE.*.key -e +3024000 -f
$ZONE.signed $ZONEDIR/$ZONE.zone
$ZSKDIR/K$ZONE.*.key >> $LOG
#Set the correct permissions
chown named.named $ZONEDIR/*.signed
chmod 755 $ZONEDIR/*.signed
sleep 5
done
rm -rf $ZONEDIR/named.zone
echo $(date +"%T")"DNSSEC-Signierung abgeschlossen - Neustart des Servers" >>
$LOG
echo "$(cat $LOG)" | mail -s "DNSSEC-Signierung abgeschlossen auf xxx" $MAILREC
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
--
*
David P. Both, RHCE
Millennium Technology Consulting LLC
Raleigh, NC, USA
919-389-8678
db...@millennium-technology.com
www.millennium-technology.com
www.databook.bz - Home of the DataBook for Linux
DataBook is a Registered Trademark of David Both
*
This communication may be unlawfully collected and stored by the National
Security Agency (NSA) in secret. The parties to this email do not consent to the
retrieving or storing of this communication and any related metadata, as well as
printing, copying, re-transmitting, disseminating, or otherwise using it. If you
believe you have received this communication in error, please delete it
immediately.
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] From Networkmanager to self managed configuration files
On 03/08/2017 05:43 AM, Giles Coochey wrote: On 08/03/17 10:38, John Hodrien wrote: On Wed, 8 Mar 2017, Giles Coochey wrote: ifconfig enp0s25 192.168.0.1 netmask 255.255.255.0 route add default gw 192.168.0.254 enp0s25 echo nameserver 8.8.8.8 > /etc/resolv.conf echo nameserver 8.8.4.4 >> /etc/resolv.conf Oh okay, you really do want to back away from Redhat entirely. That's entirely your choice. What you end up with if you take this approach widely is effectively your own linux distribution. Not really, Redhat/Centos has a lot to offer, but for me, networking is a one-time configuration, and the best way to configure it is using something that falls within this principle: https://en.wikipedia.org/wiki/KISS_principle I'm not flaming NetworkManager, I'm just stating that for many (perhaps most), it is over-engineered for a server orientated distribution. I can run with the script above on 30 server instances, and it doesn't, as yet, break any of the other features of Centos that I enjoy. I do not agree with your conclusions about NetworkManager. First, I use it on several servers and firewalls that - theoretically at least - should never change. Some of the most tiresome problems I have had to fix were what happened due to renaming of NICs after replacing a bad one, or a 100Mb with a Gb NIC, or adding a new NIC to connect with a new network. NetworkManager keeps NIC naming consistent with no surprises. I am getting ready to install two new NICs in a firewall/router that already has two NICs and I am not dreading that change as I would have with the old network service. I have had excellent results with NetworkManager and am very happy with it. I see it as a significant improvement over the old network service. If you are concerned about performance issues - don't worry - you won't have any. It works fine on my RaspberryPI forewall/router using CentOS 7 for ARM and on my ancient EeePC that runs a full installation of Fedora 25. Don't try to fix something that isn't broken. -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Up to date guide/information Sendmail SMTP Auth
Try this article, "Outbound authentication for Sendmail." http://www.databook.bz/?page_id=3097 I wrote this after setting it up on my own CentOS server. On 03/08/2017 10:41 AM, Mark Weaver wrote: Hello all, I've been googling my brains out since yesterday looking for up-to-date information on this matter, and have found information that is anywhere from 15 to 5 years old. I'd really like some information that much more up to date on the subject. Specifically configuring Sendmail SMTP authentication (_no smart host stuff_). I've got Sendmail 8.14 installed on a CentOS 7.3 server. Also installed: - Cyrus-sasl - Dovecot - Openssl Essentially everything I need except the working knowledge for the process. If someone knows where I might locate this information it would be greatly appreciated. thanks Mark ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both * "I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that." - Thomas Edison, in conversation with Henry Ford and Harvey Firestone, 1931 * -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kernel memory accounting
First - why in the world would you want to disable kernel memory accounting? I don't think that is even possible (despite not being a kernel programmer myself) because the kernel must needs account for every bit of real and virtual memory in the system in order to do its job. Second - the first note in the doc to which you refer says that it is hopelessly out of date and further down it indicates it refers to 2.6 kernels and we are now at 4.9. So now my question boils down to - what is it that you are trying to do that makes you think you have to disable kernel memory accounting? On 03/10/2017 02:25 PM, Wensheng Deng wrote: Hi CentOS experts, I am using CentOS 7. Trying to disable kernel memory accounting: according to https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt, passing cgroup.memory=nokmem to the kernel at boot time, should be able to archive that. However it is not the case in my exercise. These are what I have now $ grep CONFIG_MEMCG_KMEM /boot/config-3.10.0-327.36.3.el7.x86_64 CONFIG_MEMCG_KMEM=y $ cat /proc/cmdline BOOT_IMAGE=/vmlinuz-3.10.0-327.36.3.el7.x86_64 root=UUID=56568066-5719-46d9-981d-278c7559689b ro quiet cgroup.memory=nokmem systemd.log_level=debug But kernel memory is still accounted in user's applications. Any suggestion on how to chase the issue is greatly appreciated! Thank you! Best Regards, Wensheng ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kernel memory accounting
Well, that is exactly what it is supposed to do. The easy way to fix this is add more memory. A wildly impractical attempt to turn off memory accounting will result in a really borked system that will suck up all your time trying to recompile the kernel to make it work. Don't even go down that road. Memory is very cheap these days. Your time is one of the most valuable commodities on the planet. And oh, by the way - are you sure it is RAM you ran out of and not hard drive space? So my questions now become - How much RAM do you have? How much swap space? What error message did you get? Are you using something like top, htop, iotop, or glances to monitor your system and discover the root cause of this problem. Do you have SAR installed and enabled? You would also need to set the granularity for 1 minute instead of the default 10. What does SAR tell you? From where (what device or medium) are you copying the data from and to? But no matter how many questions you answer, my response will probably still be the same - get more RAM. Or at least more of the limiting resource -and that does sound like RAM right now. On 03/10/2017 03:51 PM, Wensheng Deng wrote: I have 3.10 kernel. I am running some data processing job, need to first copy big (>5 GB) input files. The jobs were killed, because the system thought I used 5 GB memory from the file copying. On Fri, Mar 10, 2017 at 3:04 PM, David Both wrote: First - why in the world would you want to disable kernel memory accounting? I don't think that is even possible (despite not being a kernel programmer myself) because the kernel must needs account for every bit of real and virtual memory in the system in order to do its job. Second - the first note in the doc to which you refer says that it is hopelessly out of date and further down it indicates it refers to 2.6 kernels and we are now at 4.9. So now my question boils down to - what is it that you are trying to do that makes you think you have to disable kernel memory accounting? On 03/10/2017 02:25 PM, Wensheng Deng wrote: Hi CentOS experts, I am using CentOS 7. Trying to disable kernel memory accounting: according to https://www.kernel.org/doc/Documentation/cgroup-v1/memory. txt, passing cgroup.memory=nokmem to the kernel at boot time, should be able to archive that. However it is not the case in my exercise. These are what I have now $ grep CONFIG_MEMCG_KMEM /boot/config-3.10.0-327.36.3.el7.x86_64 CONFIG_MEMCG_KMEM=y $ cat /proc/cmdline BOOT_IMAGE=/vmlinuz-3.10.0-327.36.3.el7.x86_64 root=UUID=56568066-5719-46d9-981d-278c7559689b ro quiet cgroup.memory=nokmem systemd.log_level=debug But kernel memory is still accounted in user's applications. Any suggestion on how to chase the issue is greatly appreciated! Thank you! Best Regards, Wensheng ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both * "I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that." - Thomas Edison, in conversation with Henry Ford and Harvey Firestone, 1931 * -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consen
Re: [CentOS] laptop editing
I have a DVD R/W drive that plugs into a USB port, but I always copy the ISO image to a USB memory stick and it works just fine. You may have to fiddle with BIOS to boot to an external USB device, but I have never had a problem. I have Fedora 24 and 25, as well as CentOS 6.X and 7.X on USB sticks so I can test hardware in a store and do installs. On 03/16/2017 11:20 PM, ken wrote: On 03/16/2017 10:20 PM, Michael Hennebry wrote: How does one put centos on a laptop? My understanding that laptops no longer come with optical drives. Booting from an install disk would be difficult. From https://wiki.centos.org/HowTos/Laptops : Preparation tasks Repartition your harddisk Backup your Master Boot Record (MBR) Modifying your bootloader My understanding is that most laptops have at most one harddisk. Can it really be unmounted for partitioning? Not true. Last year I got an HP Envy 17 (and it's still being sold) and it has a DVD r+w. This can't be the only laptop being sold with an optical drive. Also, a couple months ago I put a "Live USB" (Fedora) Linux distro on a USB stick, booted it, and it came up and worked fine. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos -- * David P. Both, RHCE Millennium Technology Consulting LLC Raleigh, NC, USA 919-389-8678 db...@millennium-technology.com www.millennium-technology.com www.databook.bz - Home of the DataBook for Linux DataBook is a Registered Trademark of David Both * This communication may be unlawfully collected and stored by the National Security Agency (NSA) in secret. The parties to this email do not consent to the retrieving or storing of this communication and any related metadata, as well as printing, copying, re-transmitting, disseminating, or otherwise using it. If you believe you have received this communication in error, please delete it immediately. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Primary DNS server with BIND on a public machine running CentOS 7
Here are two articles on DNS that I wrote for Opensource.com.
Introduction to the Domain Name System (DNS)
https://opensource.com/article/17/4/introduction-domain-name-system-dns
Build your own DNS name server on Linux
https://opensource.com/article/17/4/build-your-own-name-server
I hope this helps.
On 04/11/2017 01:34 PM, Gordon Messmer wrote:
On 04/11/2017 10:05 AM, Nicolas Kovacs wrote:
Is there a*reliable* more or less quick & dirty tutorial on how to get
BIND up and running as a primary public nameserver, with the default
configuration as a starting point?
1: Change the "listen-on" settings to bind to network interfaces:
- listen-on port 53 { 127.0.0.1; };
- listen-on-v6 port 53 { ::1; };
+ listen-on port 53 { any; };
+ listen-on-v6 port 53 { any; };
2: Allow external queries by removing the allow-query setting entirely:
- allow-query { localhost; };
3: Disallow recursion by removing recursion setting:
- recursion yes;
4: Add your zones.
DNSSEC is slightly more involved, but basic setup should be basically
the same as what you've been doing.
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
--
*
David P. Both, RHCE
Millennium Technology Consulting LLC
Raleigh, NC, USA
919-389-8678
db...@millennium-technology.com
www.millennium-technology.com
www.Linux-Databook.info - Home of the DataBook for Linux
DataBook is a Registered Trademark of David Both
*
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
