[CentOS] black display during installation of CentOS5.5

2010-10-17 Thread Ritika Garg 
During installation of CentOS5.3 from DVD, the installation was interuppted
due to an error in a rpm package as the DVD had lot of scratches. So I
burned image of CentOS5.5 on DVD. I selected installation in graphical mode.
The first graphical interface screen comes from where we proceed further by
clicking next. This screen is almost black and its impossible to carry out
further installation as visibility is very poor.
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[CentOS] CentOS-announce Digest, Vol 68, Issue 8

2010-10-17 Thread centos-announce-request 
Send CentOS-announce mailing list submissions to
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Today's Topics:

   1. CESA-2010:0768 Important CentOS 5 i386java-1.6.0-openjdk
  Update (Karanbir Singh)
   2. CESA-2010:0768 Important CentOS 5 x86_64  java-1.6.0-openjdk
  Update (Karanbir Singh)
   3. CEBA-2010:0769  CentOS 5 i386 glibc Update (Karanbir Singh)
   4. CEBA-2010:0769  CentOS 5 x86_64 glibc Update (Karanbir Singh)
   5. CEBA-2010:0772 CentOS 5 x86_64 logrotate Update (Karanbir Singh)
   6. CEBA-2010:0772  CentOS 5 i386 logrotate Update (Karanbir Singh)


--

Message: 1
Date: Thu, 14 Oct 2010 10:59:21 +
From: Karanbir Singh 
Subject: [CentOS-announce] CESA-2010:0768 Important CentOS 5 i386
java-1.6.0-openjdk Update
To: centos-annou...@centos.org
Message-ID: <20101014105921.ga31...@chakra.karan.org>
Content-Type: text/plain; charset=us-ascii


CentOS Errata and Security Advisory 2010:0768 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0768.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( md5sum Filename ) 

i386:
d363fcd15f20c114d7bb4305a9c259ec  
java-1.6.0-openjdk-1.6.0.0-1.16.b17.el5.i386.rpm
8be28025367183b3890005dc733e9854  
java-1.6.0-openjdk-demo-1.6.0.0-1.16.b17.el5.i386.rpm
ea7d66fe427fd40534558d8618d63676  
java-1.6.0-openjdk-devel-1.6.0.0-1.16.b17.el5.i386.rpm
49df6dfbf9b498fcfdb02339708632f9  
java-1.6.0-openjdk-javadoc-1.6.0.0-1.16.b17.el5.i386.rpm
b3c59168b46854bd14c379a78494ed36  
java-1.6.0-openjdk-src-1.6.0.0-1.16.b17.el5.i386.rpm

Source:
51c79aae4a1ef8d7fccc57a2819fbc25  
java-1.6.0-openjdk-1.6.0.0-1.16.b17.el5.src.rpm


-- 
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--

Message: 2
Date: Thu, 14 Oct 2010 10:59:21 +
From: Karanbir Singh 
Subject: [CentOS-announce] CESA-2010:0768 Important CentOS 5 x86_64
java-1.6.0-openjdk Update
To: centos-annou...@centos.org
Message-ID: <20101014105921.ga31...@chakra.karan.org>
Content-Type: text/plain; charset=us-ascii


CentOS Errata and Security Advisory 2010:0768 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0768.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( md5sum Filename ) 

x86_64:
1115bb55b60bbd401695cd10753f88d4  
java-1.6.0-openjdk-1.6.0.0-1.16.b17.el5.x86_64.rpm
47d6304adfd1394070222edc27c19029  
java-1.6.0-openjdk-demo-1.6.0.0-1.16.b17.el5.x86_64.rpm
f9b9cc79fdb6597a29f0151c9754bd40  
java-1.6.0-openjdk-devel-1.6.0.0-1.16.b17.el5.x86_64.rpm
797da004080070c8bac57e52d1717e53  
java-1.6.0-openjdk-javadoc-1.6.0.0-1.16.b17.el5.x86_64.rpm
e327e8468aa249d32bbc8ba6eb68010a  
java-1.6.0-openjdk-src-1.6.0.0-1.16.b17.el5.x86_64.rpm

Source:
51c79aae4a1ef8d7fccc57a2819fbc25  
java-1.6.0-openjdk-1.6.0.0-1.16.b17.el5.src.rpm


-- 
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--

Message: 3
Date: Thu, 14 Oct 2010 13:29:07 +
From: Karanbir Singh 
Subject: [CentOS-announce] CEBA-2010:0769  CentOS 5 i386 glibc Update
To: centos-annou...@centos.org
Message-ID: <20101014132907.ga31...@chakra.karan.org>
Content-Type: text/plain; charset=us-ascii


CentOS Errata and Bugfix Advisory 2010:0769 

Upstream details at : https://rhn.redhat.com/errata/RHBA-2010-0769.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( md5sum Filename ) 

i386:
9ec0bf96ab13ad3a0d9d93d7eb225798  glibc-2.5-49.el5_5.5.i386.rpm
d05755248017d2da5803b143de82e0a8  glibc-2.5-49.el5_5.5.i686.rpm
6b897cd3852c16dfef4cf31cc6565ff4  glibc-common-2.5-49.el5_5.5.i386.rpm
1a378d7d2912f33160824b4d74f358a0  glibc-devel-2.5-49.el5_5.5.i386.rpm
2b566b6eea3a4014711e7f457f4db1b4  glibc-headers-2.5-49.el5_5.5.i386.rpm
f3f328c3e1ff0edf31fbc686ce4ed9dd  glibc-utils-2.5-49.el5_5.5.i386.rpm
275444f11e799e970e6c1572a6dc9328  nscd-2.5-49.el5_5.5.i386.rpm

Source:
fe7984d82ebabca13db40965d6302296  glibc-2.5-49.el5_5.5.src.rpm


-- 
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--

Message: 4
Date: Thu, 14 Oct 2010 13:29:08 +
From: Karanbir Singh 
Subject: [CentOS-announce] CEBA-2010:0769  CentOS 5 x86_64 glibc
Update
To: centos-annou...@centos.org
Message-ID: <20101014132908.ga31...@chakra.karan.org>
Content-Type: text/plain; charset=us-as

Re: [CentOS] best practices in using shared storage for XEN Virtual Machines and auto-failover?

2010-10-17 Thread Rudi Ahlers 
On Fri, Oct 15, 2010 at 11:03 PM, Pasi Kärkkäinen  wrote:
> On Thu, Oct 14, 2010 at 01:25:01PM +0200, Rudi Ahlers wrote:
>> Hi all,
>>
>> Can anyone pleas tell me what would be best practice to use shared
>> storage with virtual machines, especially when it involved high
>> availability / automated failover between 2 XEN servers?
>>
>> i.e. if I setup 2x identical XEN servers, each with say 16GB RAM, 4x
>> 1GB NIC's, etc. Then I need the xen domU's to auto failover between
>> the 2 servers if either goes down (hardware failure / overload /
>> kernel updates / etc).
>>
>> What is the best way to connect a NAS / SAN to these 2 servers for
>> this kind of setup to work flawlessly? The NAS can export iSCSI, NFS,
>> SMB, etc. I'm sure I could even use ATAOE if needed
>>
>
> You could use Citrix XenServer, or XCP.. they're based on CentOS 5,
> and they support shared storage with iSCSI out-of-the-box on multi-host pools.
>
> If you go with the "plain" CentOS route you need to script/manage it yourself.
>
> -- Pasi

Did you even read my whole message?

-- 
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[CentOS] Postfix wont stay started

2010-10-17 Thread Dotan Cohen 
What should I start troubleshooting when postfix will not stay running:

[r...@mercury ssl]# service postfix start
Starting postfix:  [  OK  ]
[r...@mercury ssl]# service postfix status
master is stopped
[r...@mercury ssl]#

Thanks!

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Re: [CentOS] Postfix wont stay started

2010-10-17 Thread Eero Volotinen 
2010/10/18 Dotan Cohen :
> What should I start troubleshooting when postfix will not stay running:
>
> [r...@mercury ssl]# service postfix start
> Starting postfix:                                          [  OK  ]
> [r...@mercury ssl]# service postfix status
> master is stopped
> [r...@mercury ssl]#

check out logs..

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Re: [CentOS] Postfix wont stay started

2010-10-17 Thread Dotan Cohen 
On Sun, Oct 17, 2010 at 23:17, Eero Volotinen  wrote:
>
> check out logs..
>


Thanks, Eero, I know that should be the first step always! It turns out that:
Oct 17 23:12:47 mercury postfix/postfix-script: starting the Postfix mail system
Oct 17 23:12:47 mercury postfix/master[30770]: fatal: bind 127.0.0.1
port 25: Address already in use

Which led me to:
[r...@mercury log]# netstat -anp --tcp --udp | grep LISTEN | grep 25
tcp0  0 127.0.0.1:250.0.0.0:*
 LISTEN  2870/exim

Stopping exim let me start postfix. Thanks!


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Re: [CentOS] best practices in using shared storage for XEN Virtual Machines and auto-failover?

2010-10-17 Thread Drew 
> What is the best way to connect a NAS / SAN to these 2 servers for
> this kind of setup to work flawlessly? The NAS can export iSCSI, NFS,
> SMB, etc. I'm sure I could even use ATAOE if needed

Unless you want to use cluster aware filesystems I'd say NFS is your best bet.


-- 
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Re: [CentOS] Postfix wont stay started

2010-10-17 Thread Robert Heller 
At Sun, 17 Oct 2010 23:29:18 +0200 CentOS mailing list  
wrote:

> 
> On Sun, Oct 17, 2010 at 23:17, Eero Volotinen  wrote:
> >
> > check out logs..
> >
> 
> 
> Thanks, Eero, I know that should be the first step always! It turns out that:
> Oct 17 23:12:47 mercury postfix/postfix-script: starting the Postfix mail 
> system
> Oct 17 23:12:47 mercury postfix/master[30770]: fatal: bind 127.0.0.1
> port 25: Address already in use
> 
> Which led me to:
> [r...@mercury log]# netstat -anp --tcp --udp | grep LISTEN | grep 25
> tcp0  0 127.0.0.1:250.0.0.0:*
>  LISTEN  2870/exim
> 
> Stopping exim let me start postfix. Thanks!

Quoting from "Highlander": "There can be only one."  For any given
service (SMTP in this case), there can be only one listener.  One cannot
run two MTAs at the same time (unless one is using a non-standard port
for one).

> 
> 

-- 
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[CentOS] qemu-kvm segfaults on starting guests

2010-10-17 Thread Negative 
I have a Centos 5.5 on an AMD 64 system (Athlon II x2 250).

I caught up on updates today, including
-- kernel 2.6.18-194.17.1.el5
-- glibc 2.5-49.el5_5.5.i686

I have several guests that were working before the update, but now none of
them will boot.

With each attempt I get a message in /var/log/messages:
-- kernel: qemu-kvm[xx]: segfault at 00379fc0da11 rip 2b9f2732283f
rsp 446a6e80 error 7

Has this happened to others? Any fix. I see similar bugreports, but they are
not recent, and not quite like this. The closest thing I can find was on an
nvidia list about vmware posted today -- so maybe this has something to do
with needing to rebuild the nvidia drivers with every kernel update.

Any ideas?
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Re: [CentOS] Postfix wont stay started

2010-10-17 Thread Dotan Cohen 
On Sun, Oct 17, 2010 at 23:57, Robert Heller  wrote:
> Quoting from "Highlander": "There can be only one."

I have to read that! I'm in the middle of Dune now...


>  For any given
> service (SMTP in this case), there can be only one listener.  One cannot
> run two MTAs at the same time (unless one is using a non-standard port
> for one).
>

Actually, this server has four IP addresses: one each on eth0, eth0:0,
eth0:1, and eth0:2. Would it be possible to run an arbitrary service
(it's actually a Java-based game server) on port 80 on one IP address,
and Apache on port 80 on another IP address?


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Re: [CentOS] qemu-kvm segfaults on starting guests

2010-10-17 Thread Akemi Yagi 
On Sun, Oct 17, 2010 at 3:11 PM, Negative  wrote:
> I have a Centos 5.5 on an AMD 64 system (Athlon II x2 250).
>
> I caught up on updates today, including
> -- kernel 2.6.18-194.17.1.el5
> -- glibc 2.5-49.el5_5.5.i686
>
> I have several guests that were working before the update, but now none of
> them will boot.
>
> With each attempt I get a message in /var/log/messages:
> -- kernel: qemu-kvm[xx]: segfault at 00379fc0da11 rip 2b9f2732283f
> rsp 446a6e80 error 7
>
> Has this happened to others? Any fix. I see similar bugreports, but they are
> not recent, and not quite like this. The closest thing I can find was on an
> nvidia list about vmware posted today -- so maybe this has something to do
> with needing to rebuild the nvidia drivers with every kernel update.
>
> Any ideas?

As you noted, the latest version 260.19.12 causes segfault:

http://www.nvnews.net/vbulletin/showthread.php?t=156168

Until Nvidia fixes the issue, the only solution known so far is to go
back to an earlier version.

Akemi
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[CentOS] Not receiving mail

2010-10-17 Thread Dotan Cohen 
I have installed Postfix, Dovecot, and Squirrelmail on a CentOS 5.5
machine. In Squirrelmail a user can send mail, but he is not receiving
replies. There is nothing relevant in the maillog other than the
user's (successful) login attempts. I am at  loss, I have been
following tutorials such as the Perfect Server [1] series and other
Google results, but I cannot get this thing to receive mail. What
should I be checking?

Thanks!


[1] http://www.howtoforge.com/perfect-server-centos-5.5-x86_64-ispconfig-2

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[CentOS] iptables: comprehensive tutorial for CentOS?

2010-10-17 Thread Boris Epstein 
Hello listmates,

I know this may sound stupid... but I am trying to set up a
firewall/filter/forwarder using CentOS 5.5 machine as a platform and I
am succeeding but only partially. Fro example, I am literally trying
to forward HTTP and HTTPS (TCP 80 and 443) from the public interface
to a private IP and TCP 80 works like a charm whereas TCP 443 seems to
be a no-go.

To that effect: does anyone know of a comprehensive relevant manual? I
mean, I must be doing something wrong here though I ain't sure what.

Any advice and suggestions much appreciated.

Boris.
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Re: [CentOS] iptables: comprehensive tutorial for CentOS?

2010-10-17 Thread Adam Tauno Williams 
On Sun, 2010-10-17 at 18:41 -0400, Boris Epstein wrote: 
> Hello listmates,
> I know this may sound stupid... but I am trying to set up a
> firewall/filter/forwarder using CentOS 5.5 machine as a platform and I
> am succeeding but only partially. Fro example, I am literally trying
> to forward HTTP and HTTPS (TCP 80 and 443) from the public interface
> to a private IP and TCP 80 works like a charm whereas TCP 443 seems to
> be a no-go.
> To that effect: does anyone know of a comprehensive relevant manual? I
> mean, I must be doing something wrong here though I ain't sure what.

There is nothing CentOS specific about iptables.  Just check out


> Any advice and suggestions much appreciated.

Try the *excellent* fwbuilder application; then you can design your
iptables rules graphically and even install them.


I know I'll never waste time building iptables rulesets by hand again.
-- 
Adam Tauno Williams  LPIC-1, Novell CLA

OpenGroupware, Cyrus IMAPd, Postfix, OpenLDAP, Samba

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Re: [CentOS] Postfix wont stay started

2010-10-17 Thread Scott Robbins 
On Mon, Oct 18, 2010 at 12:30:11AM +0200, Dotan Cohen wrote:
> On Sun, Oct 17, 2010 at 23:57, Robert Heller  wrote:
> > Quoting from "Highlander": "There can be only one."
> 
> I have to read that! I'm in the middle of Dune now...

This was actually best known as a movie--I reckon most of you are too
young.   Hrrm, there was a TV show afterwards, too.

While there's probably a book adaptation, the movie was the first well
known version. 

http://www.imdb.com/title/tt0091203/

Sorry for off-topic.


-- 
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your principal as your pal' I say, 'Think of me as your judge, 
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Re: [CentOS] Not receiving mail

2010-10-17 Thread Ryan Wagoner 
On Sun, Oct 17, 2010 at 6:39 PM, Dotan Cohen  wrote:
> I have installed Postfix, Dovecot, and Squirrelmail on a CentOS 5.5
> machine. In Squirrelmail a user can send mail, but he is not receiving
> replies. There is nothing relevant in the maillog other than the
> user's (successful) login attempts. I am at  loss, I have been
> following tutorials such as the Perfect Server [1] series and other
> Google results, but I cannot get this thing to receive mail. What
> should I be checking?
>
> Thanks!
>
>
> [1] http://www.howtoforge.com/perfect-server-centos-5.5-x86_64-ispconfig-2
>
> --
> Dotan Cohen
>

You will want to check your DNS and try to telnet to the server. If
your server is behind NAT or you run split-dns it would be advisable
to try it from another connection.

dig mx yourdomain.com
telnet smtp.yourdomain.com 25

Of course if your mx record points to something other than
smtp.yourdomain.com you will want to use that instead.

Ryan
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Re: [CentOS] Postfix wont stay started

2010-10-17 Thread Robert Heller 
At Mon, 18 Oct 2010 00:30:11 +0200 CentOS mailing list  
wrote:

> 
> On Sun, Oct 17, 2010 at 23:57, Robert Heller  wrote:
> > Quoting from "Highlander": "There can be only one."
> 
> I have to read that! I'm in the middle of Dune now...
> 
> 
> >  For any given
> > service (SMTP in this case), there can be only one listener.  One cannot
> > run two MTAs at the same time (unless one is using a non-standard port
> > for one).
> >
> 
> Actually, this server has four IP addresses: one each on eth0, eth0:0,
> eth0:1, and eth0:2. Would it be possible to run an arbitrary service
> (it's actually a Java-based game server) on port 80 on one IP address,
> and Apache on port 80 on another IP address?

Possible, but it would require some trickyness in the config files to
limit the services to only listen on certain IP addresses.

> 
> 

-- 
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[CentOS] Real time NFS monitoring

2010-10-17 Thread Fajar Priyanto 
Hi all,
Is there any tool we can use to see on NFS:
1. What files are being accessed
2. The performance (bandwidth, etc)

Thank you.
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Re: [CentOS] Postfix wont stay started

2010-10-17 Thread Les Mikesell 
On 10/17/10 5:30 PM, Dotan Cohen wrote:
> On Sun, Oct 17, 2010 at 23:57, Robert Heller  wrote:
>> Quoting from "Highlander": "There can be only one."
>
> I have to read that! I'm in the middle of Dune now...
>
>
>>   For any given
>> service (SMTP in this case), there can be only one listener.  One cannot
>> run two MTAs at the same time (unless one is using a non-standard port
>> for one).
>>
>
> Actually, this server has four IP addresses: one each on eth0, eth0:0,
> eth0:1, and eth0:2. Would it be possible to run an arbitrary service
> (it's actually a Java-based game server) on port 80 on one IP address,
> and Apache on port 80 on another IP address?

You can use specific 'Listen' directives for apache instead of the usual *:80. 
The java app will probably have an equivalent config or command line option.

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[CentOS] xen backup script

2010-10-17 Thread Tim Dunphy 
hello,


 I have a couple of longish commands that I run to backup my network
of xen hosts. I would like to cron this, but am having trouble issuing
the same command the second time to the second xen host:

 [r...@lcent01 ~]# ssh sum2 'for i in `virsh list | grep -v -e Id -e
--- -e "Domain-0"| awk '{print \$1}'`; do echo "shutting down $i";
sleep 2; virsh shutdown $i; sleep 2; echo "domain $i is shutdown";
echo echo; done'
r...@sum2's password:
awk: cmd. line:1: {print
awk: cmd. line:1:   ^ unexpected newline or end of string


--

this is the script so far:

#!/bin/bash

for i in `virsh list | grep -v -e Id -e --- -e "Domain-0"| awk '{print
$1}'`; do echo "shutting down $i"; sleep 2; virsh shutdown $i; sleep
2; echo "domain $i is shutdown"; echo; echo; \


for i in *; do echo "copying $i to nas"; sleep 2; rsync -avzp
/mnt/store/xen/$i /mnt/nas/xen; sleep 2; echo "$i has been copied to
nas"; echo; echo; done

ssh sum2 'for i in `virsh list | grep -v -e Id -e --- -e "Domain-0"|
awk '{print \$1}'`; do echo "shutting down $i"; sleep 2; virsh
shutdown $i; sleep 2; echo "domain $i is shutdown"; echo echo; done'


I think this could actually pretty useful for folks. feel free to use
and improve I would appreciate the feedback to get this to work so I
don't have to run two separate jobs on separate hosts

thanks!!!




-- 
Here's my RSA Public key:
gpg --keyserver pgp.mit.edu --recv-keys 5A4873A9

Share and enjoy!!
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[CentOS] aborting installation of CentOS

2010-10-17 Thread Ritika Garg 
During installation if due to some reason one wants to abort the
installation then is the only way to do it is to switch off the system by
pressing the power button, then switch on by pressing the power button and
pressing the optical drive eject button to take out the DVD?
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Re: [CentOS] using a Laptop as a KVM console?

2010-10-17 Thread Devin Reade 
Rudi Ahlers  wrote:

> I want to use a laptop as a KVM console.
[snip]

Other people have pointed out KVM-over-IP devices for your legacy or 
low end machines (ALOM/iLO/DRAC/whatever is still cheaper for
server-grade hardware).

I'd like to bring up the AdderLink IPEPs, which I can say from experience
is a very nice device.  They are very stable and the over-the-wire 
protocol is encrypted VNC which means, unlike many of the lower-end
competitors, you're not forced to use a Windows box to access the 
console of your windows machine.  The IPEPs has an IP-blocking mechanism
if someone tries to brute-force it.  (Of course, having it on a
non-publicly-available management network is still better.)


or


While they market them as one-per-server, you can easily amortize the
cost by hooking the IPEPs to an electronic KVM switch (the kind that
allows you to switch machines based on keyboard strokes rather than
flipping a switch), and then hooking the KVM to your servers.  Thus
the fanout depends on the capability of your KVM switch. Note that
using the KVM means that you have a security model that assumes that
anyone who logs into the KVM is permitted console access to any attached
server.  (They'd still have to log into each server.)

I think that AdderLink also has multi-server versions of IP-over-KVM
that may be better/cheaper if you need to allow for different people
with different security access to get at the servers.

Unlike an ALOM/iLO/DRAC, the IPEPs does not have any power switching
capability, so you'd still need to cover that capability off as well
if you need it.  For power management, there are also many options
for PDUs but I'd suggest the APC line, such as the AP7901 or equivalent:



IMO, this is only suitable for single-power-supply servers  (If you're
using a redundant power supply in your servers, you should also have
an ALOM/iLO/DRAC.)

If you go the IPEPs + KVM route, I'd suggest ensuring that your KVM
doesn't draw power from the keyboard/monitor/mouse connectors so that
if you need to reset the KVM you can power cycle it remotely via a
PDU rather than needing to be on site.  (The DLink DKVM-8E is
inexpensive, but it has the draw-power-from-multiple-sourcs problem
and sometimes after a power outage it needs a reset -- for which we
need on-site access. *grumble*)

Devin

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Re: [CentOS] aborting installation of CentOS

2010-10-17 Thread Fajar Priyanto 
On Mon, Oct 18, 2010 at 1:02 PM, Ritika Garg  wrote:
> During installation if due to some reason one wants to abort the
> installation then is the only way to do it is to switch off the system by
> pressing the power button, then switch on by pressing the power button and
> pressing the optical drive eject button to take out the DVD?

If it's still during the installation menu, you can press
ctrl-alt-del. If it's already copying files, you need to press the
power button.
CMIIW.
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