the apps inside a VNC X server instead of an Xorg server.
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but
there may be an RPM out there that is compatible some place, if
you don't want to compile it.
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TP server, which I plan to use to
send data to tape from multiple systems, no more tape
backup software. For most of my production/work systems
I snapshot the important volumes on my storage array
(3PAR E200), and then back up the files on separate,
dedicated systems.
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Probably not worth filing a bug with Red Hat, they won't do anything
with it likely until RHEL 6. By then they may decide to include it
anyways(not knowing what OpenMPI or Torque support is off the top of
my head I don't know how likely this would be).
na
ethodology to diagnose the problem?
Monitor memory usage while the script is running, there is an apparent
leak somewhere. The system ran out of memory and tried to kill some stuff
but sometimes it isn't successful in killing enough in time
e plugged in and it'll work fine.
Running about 90 RHEL/CentOS systems at my current place, had
around 350 at my last job.
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as root run:
netstat -anp | grep 13 | grep LISTEN
or fuser -n tcp 13
to find the PID that is using port 13, perhaps you have
a regular inetd running at the same time as xinetd.
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LISTEN | grep 902
Likely xinetd isn't running.
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irectory to another
> directory and overwrite any file that is there.
>
> What is the correct way to do that?
As others have mentioned, I usually just do 'unalias cp' first.
But you can also do yes | cp (cp options) which will say y to
every prompt cp spits out.
nate
during %post as well -
sed -i s'/^NETWORKING_IPV6=yes/NETWORKING_IPV6=no/'g /etc/sysconfig/network
If you don't need IPv6 iptables I'd suggest disabling it, perhaps
something like
chkconfig --level 2345 ip6tables off
(since I don't have the package ins
distros/versions
I have to support, on about 85 servers, works quite well.
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l of the drivers we need have been included in the
stock kernel/install images.
So yeah, takes some time, but for me it's peanuts in comparison to
what else has to be done to make the distribution "perfect".
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more difficult to manage than it was worth at the time.
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. Curious why your using a MTU of 4500? Seems like an unusual
number, common MTU for jumbo is 9000.
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to). And install the updated
drivers at the same time as I install the new kernel. So far it's
worked every time, no need to run vmware-config after kernel updates.
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EL/CentOS, in most
cases it should work.
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do I know exactly
what the build process is, I just take the resulting binaries, so I'm
not really one that can submit the driver.
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ulate devices and partition
tables while several (optional) filesystem tools provide support for
filesystems not included in libparted.
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liance, and there was at least 50-60 servers that did
not run any sort of HTTP service(they ran other services that talked
other protocols). While we talked about PCI compliance I never heard
of anything needing to scan the network for HTTP servers.
nate
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on a dual core system. YMMV.
original source:
http://zlib.net/pigz17.c.gz
if that doesn't exist there may be a new version, try pibz18.c.gz 19.c.gz
..etc
---
To be safe, since I deployed it a few months ago I've been running
gzip -t afterwards on the
a client-side issue.
(sorry, end rant :) )
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be able to renew the lease when it expires. You
can check the logs on the server to see if you can see why
it cannot renew the lease if you want as well.
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d also
assume that I have every RPM, which I may not(base distro RPMs
aside).
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this case
it happens to be though.
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f configuring the clients to
use the proxy? It'd be more secure anyways considering not everything
has configuration to use a proxy.
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Matt Hyclak wrote:
> On Fri, Feb 01, 2008 at 10:16:47AM -0800, nate enlightened us:
>> Matt Hyclak wrote:
>>
>> > Is 'yum provides foo' not good enough?
> [EMAIL PROTECTED] ~]$ yum provides libkabc_dir.so.1
> Loading "priorities" plugin
> Se
managed by the distribution itself.
thanks
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le. If nothing shows up then that device doesn't exist.
Not knowing how megaraid exports a virtual disk I'm not sure what
LUN it might assign, or maybe it presents it as a new ID number
instead of a new LUN.
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simply rescan the bus without knowing what you
> are expecting:)
There was, and might still be, I recall a command in RHEL 3 I think it
was but I don't see it in newer versions. Looking at one of my
Debian Sarge systems running on a 2.4 kernel there is a scsiadd -s
command to scan for new devices
ovided FC drivers I tried it with.
Good to know, I use that interface all the time in RHEL4/5 CentOS 4/5,
haven't heard of the new interface yet.
thanks
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ound-robin basis between them.
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info |grep DPMS
should return "DPMS"
I have to explicitly set my monitor power saving to off on my laptop
otherwise the screen has a high likelyhood of not coming back on after
turning off. Toshiba says it's a known behavioral issue with multi
core laptops. Happened un
it
myself for very long).
I'd try the ATI drivers and see if it fixes the behavior, you'll probably
get much better performance at the same time, with perhaps a bit less
stability depending on what you do.
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ings run in %post are automatically put into a chroot so that
root is /.
At least it is for me in RHEL4/5 and CentOS 4/5/5.1 performing either
a PXE kickstart or kickstart off a CD(with everything else retrieved
from the network).
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nd was
excited about it for a while but lost interest. Don't recall what
he didn't like I think just the thought of migrating existing
cfengine configs to puppet didn't make the migration worthwhile
to him. I hear it's the "future" though.
Once the syst
-Sun_Store_US-SunCatalog&pid=8socket&cidrecord=
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the
system won't boot to the OS afterwards.
If you foresee frequent changes on your OS disks then LVM
is probably a good choice, I just got sick of the kickstart
failures with it.
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I'll be buying a system or two from
them soon, mainly since they are local and I do want on-site support,
don't want to troubleshoot and replace stuff myself.
Both specialize in Supermicro systems.
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them once the OS is
installed.
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Keith Christian wrote:
> PXE begins the install with DHCP, so Kickstart should already know which of
> eth0, eth1, etc. to use.
add ksdevice=eth0 to your kernel parameters, or eth1 if you want
to use eth1. This works for me anyways.
nate
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John R Pierce wrote:
> or leave the FC unplugged during the install for the same net effect :)
yeah that works too assuming your on site! :)
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As I get closer to 8TB I can add more space on
the fly, re-balance the I/O for maximum performance
and continue to grow as-needed.
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;t tried though
# Postfix Client configuration for production environments
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
mail_owner = postfix
inet_interfaces = 127.0.0.1
recipient_delimiter = _
setgid_group = postdrop
relayhost = prod
to runlevel 1 and copy
the files to the new locations and re-mount the LVM volumes as
your /usr /var etc.
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in an expansion
card in the APC UPSs.
Also if you happen to be using nagios there is built in support in
nagios's plugins to check a NUT server for UPS status.
Been using NUT myself for about 8 years now. Mostly on APC UPSs, but
also Cyberpower as well.
nate
_
no tuning. Of course
when doing file transfers, local I/O subsystems limited the transfer
to about 250-300Mbit(pair of 7200RPM SATA disks on each end).
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Padmaja wrote:
> Can any one please tell me how to revert back to the original
> configuration or to undo these changes?
Re-install the original kernel RPM. You may have to --force it
to overwrite the existing since it's already insta
Todd Reed wrote:
> Does anyone have any success stories they can share and what type of load
> balancers they've used? All this needs to run on CentOS and be OpenSource.
Well, almost fits your needs, but F5 BigIP runs on CentOS last I
checked :) Works beautif
kernel,
I *think* you can get around that by using rpm -iv instead of -Uvh,
that should install the new kernel along side the old. But you should
keep a backup of the other kernel just in case(or track down the
original RPM for that as well).
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s, everything
is through cfengine or manual. Haven't found a good way to
use yum in my environments.
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many wireless card drivers.
You'll need to make sure that the wifi card on the host is configured,
connected and has an IP address in order for the guest VM to work with
it.
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ew kernel on your system(s). I
do this for a few things such as drivers for VMWare when a new
kernel comes out and updated qlogic drivers as well for my
HBAs.
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Frank Cox wrote:
> So... how can I fix that?
Have him log out and log back in again? Check for errors in the
user's ~/.xsession-errors to try to determine why it might of crashed.
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3Ware or nothing. I haven't ever
really noticed good things said about other SATA raid cards.
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on't install
it very often). I've installed HPUX, AIX, Tru64, Solaris, tons
of Linux distros, FreeBSD, and OpenBSD, and probably a couple
others I've forgotten, and still that fdisk-type tool that
OpenBSD uses is so confusing.
OpenBSD PF user guide here: http://www.openbsd.org/faq/p
s.
Or upgrade to ESX 3.x
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, maybe it's there now.
My network switches run linux too(I think some commercial embedded
flavor), as does my storage array(SSH banner says Debian at least).
Neither give access to a native linux shell though. Shit, even my
new Phillips TV runs linux. Crazy seems like almost e
ng, the gateway works fine I can ping the google ip, but if i
> use the google.com it dosent work.
> can any body help me
Is your nameserver(s) correctly specified in /etc/resolv.conf on the
CentOS 5 server ? Maybe there is a typo in that file.
nate
_
Also you can check the kernel log(dmesg for the latest events) to see
if there are errors related to the drive(such as read errors, drive
resets etc).
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I run ESRP in my environment to provide layer 3
router fault tolerance as well as layer 2 loop prevention in a single
protocol(that doesn't require any protocols be installed on downstream
equipment unlike (R|M)STP)
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n though we were not, it
was amusing at least. I don't know why the app returned HTTP/200
(it was a fairly complex tomcat/weblogic application), maybe just
bad design, but the security scanner was just as bad looking for
a HTTP/200 to determine if the security hole was present.
nate
2 Patch Set 2 10.2.0.3.0
There are 3 products installed in this Oracle Home.
Interim patches (34) :
[..]
(snip)
And guess what? all 34 patches are security related. I have
8 more patches to get installed soon as well.
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if a bug is found in CentOS it's almost certain to appear in RHEL,
but without reproduction under RHEL the vendor is unlikely to
approach Red Hat and say you have a bug in your product even though
I was using CentOS.
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managers out
there(I'm a fan of Afterstep for example) that provide less things
but at the same time use far less resources.
Of course if you try to run stuff like firefox, open office etc
you'll still run into a memory wall pretty quick. Opera is a good
choice for low memory systems. I&
orted. Not sure about security
related things.
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e -n
ping -c 5 (IP of default gateway)
arping -c 5 (IP of default gateway)
arp -an
lsmod
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ls in between the one you were on and the latest
and see if any of them break, likely they will as the latest kernel
only has 1 change in it. Maybe you can narrow it down to a
particular kernel rev that came out.
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ing else?
What does lspci say for your NIC?
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var/named/proc type none (rw,bind)
Not sure about the sys file system, maybe it's the
same, maybe it's not.
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My Thunderbird has been running for about 18 hours and is using
over 200MB of memory already(2.0.0.6).
In 64-bit mode I wouldn't be surprised if the same usage would
come out to 500MB+ memory usage.
Of course if you have enough memory not to care to set aside half
a gig to your e-mai
ur quite new, may I ask what is the reason behind wanting
to disable PAM ? I can't imagine any reason why someone would want
to do that. But I'm sure there is some reason out there..
Just curious.
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vincenzo romero wrote:
> Hello Nate,
Hi!
> Since this is not a secure environment, would you be so kind to help
> me and let me know how to disable PAM? .. :)
If I knew off the top of my head of course I would reveal how. I've
never investigated the topic. Sounds like you have so
tained available bandwidth.
The options I use:
rsync -ave ssh (local file) remote_server:(remote file)
or rsync -ave ssh --progress (rest of command)
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width
and not your outbound. 100KByte/second is fairly typical for outbound
connectivity for consumer broadband links. Of course if your lucky
enough to have a real good connection such as metro ethernet, or a
direct fiber connection, then that's another story and you should
have ple
stion didn't make sense to
me try to re-phrase it.
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d on
the least currently used IP. But no indications of whether or
not you can use IPs from different subnets(from the above, I
assume not).
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you won't have to worry about
it building up again, pesky thing!
:)
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assuming /tftpboot/ is where your root is at)
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t can go way beyond 2x.
It's just not worth it for most things. I tried migrating a web server
that runs Ruby on Rails/FastCGI from 32-bit to 64-bit and experienced
a 300% increase in memory utilization and about a 75% reduction in
performance. (before that my goal was to try to make everything
Rogelio wrote:
> [Wed Feb 27 15:41:13 2008] [error] [client 10.200.200.58] Directory index
> forbidden by Options directive: /var/www/mrtg/
Run MRTG's indexmaker to make an index file(index.html), or update the
apache config to allow Indexes for that direc
out of /proc/cmdline during %post
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uuid" does not appear in the man pages for pvchange and
> vgchange for lvm2-2.02.26-3.el5):
check this out, I went down this path briefly but aborted and
came up with a better solution for my needs,
http://linuxplanet.com/linuxplanet/tutorials/6389/3/
nate
__
rer
of the disk and then RMA it. Even one bad block that is visible is
enough to authorize an RMA from any manufacturer that I've dealt
with in the past several years.
If it didn't mount, then try a automatic fsck and pray it doesn't
render t
D 0 volume or not on a RAID volume at all. If
you have multiple swap partitions/files on different volumes/disks
you can round robin the swap by mounting them with the same
priority level, getting similar performance to RAID 0, while
maintaining high(er) availability.
nate
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ble. Log to VT and a file.
Kickstart in RHEL5/CentOS 5 you can do this
%post
(
do your stuff here
) 1>/root/kickstart-post-install.log 2>&1
Not sure if older versions of RHEL/CentOS support that.
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t has a 8006-2.
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d almost a year ago, I think with v4.5)
They also support hot swap, provided the interface to the disk
supports it(typically a hot swap backplane).
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f course I may of had data loss, but in the past 8 years it's not
been anything that I've personally noticed.
I'm not sure if all 3Ware models support BBU or not.
For anything real serious like I prefer bigger dedicated storage
systems, my array of choice
ss
your doing something like desktop consolidation with virtualization or
remote application hosting/thin client.
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use tee, which should do the job.
For my systems I have the server email me upon initial reboot
among other things the contents of the post-install for review.
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Robert Arkiletian wrote:
> On 3/10/08, nate <[EMAIL PROTECTED]> wrote:
>
>> You can turn on write back caching if you have a UPS as well
>> (provided your UPS is wired into your system for a graceful shutdown)
>
> Hopefully you have a redundant PS unit. Having a UPS
sts as well.
(see remote announce and remote browse sync options)
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cific with CentOS 5.1.
I see in the release notes that SAN boot is supported, but
doesn't give any special instructions.
Anyone else booting CentOS directly from a FC SAN ? Any
special considerations needed for multipathing and
stuff when booting
controller off in the bios but the installer still
may of seen it and installed stuff to it. With VMWare it doesn't
support that SATA controller so it never touched the internal disks.
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e for a large enough site to really
take advantage of it(with all of the horizontal scaling
it seems to be able to do in the newer versions).
My personal servers run debian, I haven't tried cyrus on
CentOS.
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/dim2400/en/sm_en/specs.htm
Looks like it supports multiple memory speeds, a lot of systems
can use more total memory if the memory speed is lower(most often
seen this on Supermicro boards anyways)
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nd none have really shown
> such a large difference.
du won't look at deleted files, while df will.
run
lsof | grep deleted
and see if any files are deleted are still open, space from them
will not be freed until the process releases th
Robert Heller wrote:
> df does not look at files (deleted or not) at all! It just looks at
> allocated inodes.
yeah but the result is pretty much the same, at least to me. I suppose
I could of worded it a bit differently.
nate
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ML wrote:
> HI All,
>
> How fast does a a small DNS Server need to be? I will have about 10
> servers and a few workstations. I have a few older Compaq PIII boxes
> with 1gb RAM each or I have faster P4 boxes.
Your watch is probably su
o.
Does linux's firewall support even have stuff like stateful failover
these days? I've been using OpenBSD(vs linux at least) since 2004
for any firewalls that I deemed "serious", FreeBSD before that.
I hate *BSD user land stuff, but I do like pf.
nate
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