Web Hosting :: Kernel Upgrade On Fedora Core 4 Server

How Do I Setup A Ubuntu DomU Guest On A CentOS / Fedora Core XEN Server
how to install Ubuntu (either 7.10 or 8.04) as a XEN domU guest on a CentOS 5 / Fedora Core 8 XEN dom0 server?

I have tried installing Ubuntu as a fully virtualized guest, but the Ubuntu CD doesn't even bootup. I get the Linux bootloader, and that's it,it doesn't continue to boot. Odd.

When trying to install a Paravirtualized guest, I had to use the debootstrap method, but can't get it to boot up.

Quote:

xm create anya_zanet
Using config file "/etc/xen/anya_zanet".
Error: (2, 'Invalid kernel', 'xc_dom_find_loader: no loader found
')

This is the xen configuration:

Code:
kernel = "/boot/vmlinuz-2.6.23.1-42.fc8"
ramdisk = "/boot/initrd-2.6.23.1-42.fc8.img"
builder='linux'
memory = 256
name = "anya_zanet"
vcpus = 1
vif = [ 'bridge=xenbr0' ]
disk = [ 'phy:/dev/System/anya_zanet,hda1,w' , 'phy:/dev/System/anya_zanet,hda2,w' ]
root = "/dev/hda1 ro"
on_poweroff = 'destroy'
on_reboot = 'restart'
on_crash = 'restart'

how to get Ubuntu working on a CentOS / Fedora Core XEN server?

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Upgrading To Fedora Core 11
I have a linux server that has active clients on it, its running Fedora Core 4 and I beleive its time to upgrade to the latest Fedora Release.

The server is running cPanel, has anyone here done an upgrade to a box running Fedora before? Any tips or tricks?

I'm hoping its a simple attend data center, reboot server with new Fedora DVD, boot off DVD select upgrade and away we go. . .

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PHP 5.1 To 5.2 On Fedora Core 5
I have a Fedora Core 5 VPS currently running PHP 5.1.6, and wish to upgrade to 5.2 so I can run Magento eCommerce software.

I've managed to install yum, and after running yum update php, it just updates to 5.1.x still

My understanding of it currently is I need to point it to new repositories with 5.2 in?

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Fedora Core 6 Compatibility
I have bought a
PowerEdge 2900 Quad-Core Xeon E5345 2.33 Ghz Processor
2GB FB 667MHz Memory
146 GB SAS hard drive
PERC 5/i integrated RAID Controller Card

I have installed Fedora Core 6 on this.But somehow it fails to work.It keeps hanging anytime anywhere.

Can anybody help me know whether this is compatible with each other?

I tried closing some services and work it,but the attempt was in vane.

I have googled alot over this and cant get it worked.

I also tried to install from different CDs,but no luck.

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How To Install FFMPEG On Fedora Core 4
i want to install FFMPEG on my server , i tried to install from here http://vexxhost.com/blog/category/ffmpeg/

but i got error in step no. 6 , put in your consideration i didn't do the step no. 5
coz my OS is Fedora core 4.

plz any one have the right way to install , tell me.

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Setup Ispconfig On Fedora Core 6
i try to install ispconfig panel con my vps fedora core 6

but i see this error

checking for MySQL support... yes
checking for specified location of the MySQL UNIX socket... no
checking for MySQL UNIX socket location... no
configure: error: Cannot find MySQL header files under /usr/local/lib/mysql.
Note that the MySQL client library is not bundled anymore!
ERROR: Could not configure PHP
cd: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory
mv: cannot stat `binaries/aps.tar.gz': No such file or directory
mv: cannot stat `binaries/spamassassin.tar.gz': No such file or directory
mv: cannot stat `binaries/uudeview.tar.gz': No such file or directory
mv: cannot stat `binaries/clamav.tar.gz': No such file or directory
mv: cannot stat `binaries/cronolog': No such file or directory
mv: cannot stat `binaries/cronosplit': No such file or directory
mv: cannot stat `binaries/ispconfig_tcpserver': No such file or directory
mv: cannot stat `binaries/zip': No such file or directory
mv: cannot stat `binaries/unzip': No such file or directory
tar: spamassassin.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
mv: cannot stat `spamassassin': No such file or directory
tar: uudeview.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
mv: cannot stat `uudeview': No such file or directory
tar: clamav.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
mv: cannot stat `clamav': No such file or directory
tar: aps.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
./setup2: line 860: ispconfig_tmp/php/bin/php: No such file or directory
ERROR: The PHP binary coming with ISPConfig does not work properly on your system! The installation routine stops here!
[root@vps198 install_ispconfig]#

how i fix this problem and install the ispconfig?

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To Upgrade Server, Question About Dual-core Servers And Best Config For Mysql
I'm running a message board and it looks like I've outgrown the low end xeon 3040 1.86GHz dual core server, and the bulk of the CPU load is going to mysqld. I'm debating between offloading the DB to a dedicated server vs upgrading the existing server and hosting the web server and db on the same machine.

Any thoughts on the better approach? fwiw, the load from apache seems next to nothing right now, but I am also planning on adding an SMTP server for user registrations and general support email.

I'm also not super familiar with dual-core and dual processor machines. Does shifting mysql to a dual core or dual proc machine help (vs a single core/single proc machine)? since there is just one mysql daemon, does having a second core or proc. buy me anything?

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Difference Between Fedora Core & CentOS
Whats the Difference between Fedora Core & CentOS?

I think my host installed the wrong OS, but just wondering to see if it's worth changing the OS if they're both the same.

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DNS Is Down On Fedora Core 5 & Rndc
I have a problem with one of the servers since the morning, DNS is down and trying to start it giving failed message.

I'm using Fedora 5
CPanel 10.9.0-S119
named (9.3.3rc2) with installed Packages: bind-9.3.3-0.2.rc2.fc5 / bind-devel-9.3.3-0.2.rc2.fc5 / bind-libbind-devel-9.3.3-0.2.rc2.fc5 / bind-libs-9.3.3-0.2.rc2.fc5 / bind-utils-9.3.3-0.2.rc2.fc5 / binutils-2.16.91.0.6-5
kernel-2.6.18-1.2257.fc5

Error Message:

Quote:

root@server [~]# service named start
Starting named:
Error in named configuration:
zone alexaian-d.com/IN: loaded serial 2006040201
zone al-jan.org/IN: loaded serial 2006073101

named.conf file

Quote:

root@server [~]# cat /etc/named.conf
include "/etc/rndc.key";

controls {
inet 127.0.0.1 allow { localhost; } keys { "rndckey"; };
};

options {
};

zone "alexaian-d.com" {
type master;
file "/var/named/ahmed-d.com.db";
};

zone "al-jan.org" {
type master;
file "/var/named/al-jinan.org.db";
};

rndc: connect failed: 127.0.0.1#953: connection refused

Quote:

root@server [~]# service named status, I'm getting the error:
rndc: connect failed: 127.0.0.1#953: connection refused

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Fedora (Core 6) And Creating Partions For CPanel
I am doing a FRESH install of Fedora Core 6 onto a brand new server. I have 2 questions about partitions on there..

1. Should all the partitions (/home, /backup, /var etc..) be of file system type "ext3?" I could not find any documentation on this anywhere.

2. A question about about LVM (Logical Volume Management). Are you supposed to create a different LVM for each partition? Or just for /tmp?

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How To Upgrade Fedora Release On Old OpenVZ Vps?
On my desktop I keep up with the Fedora life cycle by upgrading via DVD every six months or so, and I am currently running Fedora 9. By contrast, my hosted VPS based on OpenVZ/CentOS is still providing me with a Fedora Core 5 virtual environment. I used to keep up with FC5 updates via yum until FC5 maintenance ended, long ago. Question: is it possible to upgrade from Fedora Core 5 to Fedora 9 via yum and without any intervention on the current underlying VE by the VPS host? If so, how would I do that?

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Which Operating System Fedora Core, CentOS, FreeBSD
I currently run a dedicated with redhat 9 and am looking at a new server with either Fedora Core, CentOS, or FreeBSD.

I'd like your opinions on the best o/s to go with overall and also bearing in mind I'm coming from redhat and will be running cpanel on it...

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Centos + Kernel 2.6.9-34.0.2- How To Upgrade Kernel
Last year I ordered a new server with Centos 4.3 and it had the kernel kernel 2.6.9-34.0.2ELsmp installed. It runned fine and I didn't update any packages since then.

Today I started getting a problem where both mysqld and kswapd0 uses very high amounts of CPU, spiking up to 100% and my memory usage is at 99% all the time. The problem seems exactly the same as the one mentioned in this thread.

In that thread the exact same kernel is said to be insecure and to cause this problem. I also came across a centOS bug that reports this problem with high cpu, mem usage and mysql & kswapd0 consuming all resources.

In the linked thread the person solved the problem by upgrading to kernel 2.6.9-42 using rpms but others recommended a newer kernel or a custom compiled kernel for CentOS.

Apparently when they used yum it said 34.0.2 was the latest kernel.

What should I do to upgrade the kernel, which version should i upgrade to, and where do I get it from? I won't be able to compile a custom kernel and I've only installed basic rpm packages before.

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Installation Zend Optimizer & Ioncube On Fedora Core 4 Using Plesk 8.2
i got plesk 8.2 installed on my fedora core 4 server. I would like to install ioncube & zend optimizer.

Anyone can explain me stepwise how to do..

i read many post on the forum about it but i have not succeded in..

here is the infos of my server system info:

CPU:GenuineIntel, Intel(R) Xeon(TM) CPU 2.80GHz
Version: psa v8.2.0_build82070706.15 os_FedoraCore 4
OS: Linux 2.6.9-023stab033.9-enterprise
Key number: PLSK.00000000.000

component info:
awstats6.6-0.060916beta.swsoft bind9.3.1-20.FC4 coldfusionComponent was not installed coldfusion-supportComponent was not installed courier-imap3.0.8-fc4.build82070706.15 drweb4.33-rh5_psa drweb-qmail4.33-fc4.build82070706.15 frontpage5.0.2.2635-1.fc4.swsoft httpd2.0.54-10.4.1.swsoft mailman2.1.8-0.FC4.1 mod_perl2.0.1-1.fc4 mod_python3.1.4-2 mysql4.1.20-1.FC4.1 perl-Apache-ASP2.59-fc4.build82070706.15 php5.0.4-10.5.1.swsoft postgresql-serverComponent was not installed psa8.2.0-fc4.build82070706.15 psa-api-rpc8.2.0-fc4.build82070706.15 psa-autoinstaller3.2.0-build32070705.20 psa-backup-manager8.2.0-fc4.build82070706.15 psa-horde3.1.4-fc4.build82070706.15 psa-imp4.1.4-fc4.build82070706.15 psa-logrotate3.7-fc4.build82070706.15 psa-manual-custom-skin-guide8.2.0-fc4.build82070706.15 psa-migration-manager8.2.0-fc4.build82070706.15 psa-mivaComponent was not installed psa-mod-fcgid-configurator1.0-13 psa-proftpd1.3.0-fc4.build82070706.15 psa-qmail1.03-fc4.build82070706.15 psa-qmail-rblsmtpd0.70-fc4.build82070706.15 psa-rubyrails-configuratorComponent was not installed psa-spamassassin8.2.0-fc4.build82070706.15 psa-tomcat-configurator8.2.0-fc4.build82070706.15 psa-turba2.1.4-fc4.build82070706.15 rubyComponent was not installed samba3.0.23a-1.fc4.1 spamassassin3.0.6-1.fc4 SSHTerm0.2.2-fc4.build82070706.15 tomcat5.0.30-5jpp_6fc webalizer2.01_10-28

info when doing uname -a:

Linux xxx.xxxxx.xx 2.6.9-023stab033.9-enterprise #1 SMP Tue Dec 5 14:40:57 MSK 2006 i686 i686 i386 GNU/Linux

info when doing php -v:

PHP 5.0.4 (cli) (built: Nov 9 2005 09:19:53)
Copyright (c) 1997-2004 The PHP Group
Zend Engine v2.0.4-dev, Copyright (c) 1998-2004 Zend Technologies

Info when doing httpd -v:
Server version: Apache/2.0.54
Server built: Jul 31 2006 15:02:04

I struggled many times to be able to set up the ioncube & zend optimizer but in vain..

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CentOS, Debian, Fedora Core 3 & 4, Gentoo, Opensuse, Suse, Unbuntu?
Gazzin.com offers so many OSs on their VPS deals - CentOS, Debian, Fedora Core 3, Fedora Core 4, Gentoo, Opensuse, Suse, Unbuntu. Which one would you advise me to start from?

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Which Kernel To Upgrade?
My current kernel version is "2.6.9-42.0.10.ELsmp #1 SMP Fri Feb 16 17:17:21 EST 2007 i686 athlon i386 GNU/Linux". I want it to be upgraded since it is old. I have been told by our server management company that the latest kernel distributed from yum is kernel.i686 0:2.6.9-78.0.22.E. Can anyone tell me if this version is safe and secure enough? It is a CentOS release 4.7 (Final) server with cPanel installed.

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How To Upgrade Kernel
I am using centos 4.6 on 2.6.9-67smp kernel

I need to update the kernel to 2.6.25.3

is that possible ?

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Kernel Upgrade On Debian
to upgrade the kernel on a Debian 3.1 server from a 2.4 kernel to the latest 2.6 kernel.

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Upgrade Kernel VPS!
I have VPS in Linux server.XXXXX 2.6.9-023stab044.4-enterprise

ITs Very OLD!

For More Security! can i Upgrade Kernel of my vps to latest Version ?

or Higher Version?

Security Is Very Important For Me!

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CPU Upgrade, Need To Recompile The Kernel
I'm going to add a second AMD opteron 270 dual core processor + 2 GB DDR ram to my server this week, but do i have to recompile the kernel after i've installed the second processor? Or change something in grub?

setup:
1 X AMD dual core opteron 270 ( + 1 X AMD dual core opteron 270 )
2 X 1 GB DDR ECC registered ( + 1 X 2 GB DDR ECC registered)
Tyan thunder 8kse motherboard
# uname -a
Linux srv01.xx*********** 2.6.16.17 #1 SMP Mon May 22 04:13:34 EDT 2006 x86_64 x86_64 x86_64 GNU/Linux

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Network Not Starting After Kernel Upgrade
We upgraded our kernel 2.6 based servers in the network, one of them didnt came back online after rebooting the system, it seems that the network module cant be loaded.

[root@server.hostname.com:~]/etc/init.d/network start
Configuring.. : [ OK ]
Activating ... loopback: [ OK ]
Activating... eth0: device tg3 eth0 does not seem to be present, delaying initialization [FAILED]

I tried booting with older kernels but the error stills

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Fedora 5 Server
i have problem in my linux server that i have aserver with 5.2.4 apache and many scripts not working after that i upgraded to php 4.4.7 so all scipts all over my server are working but not loging with any user and pass just as u make refresh to the page
this problem in all forums and scripts in my server i need quickly solution please
my customers are confused

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Xeon 3220 Quad Core 2.4 Or 3070 Dual Core 2.66 For DB
Shall I chose the xeon quad core 2.4 GHZ or the dual core 2.66 GHZ for an adserver's database?

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Quad Core Xeon Or 2X AMD Opteron Dual Core
Which is the better performer?

(1x) Quad Core Intel Xeon X3220 2.40GHz 2x4M Cache

OR

(2x) Dual Core AMD Opteron 2216 2.4GHz 2X1MB Cache 1Ghz HyperTransport

This is for a web/application server running, Windows 2003 Server Professional, IIS, MySQL, MSSQL 2005 Express, Plesk 8.5. The price is about the same.

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[kernel: Kernel BUG At Mm/rmap.c:479] Any Idea What This Is?
we have one box in hivelocity.net that has been down so many times this month that we were forced to remove links to siteuptime where we were once so proud of having a 99.7% uptime for 3 years in theplanet.

syslog shows that just before crashing, these entries were made:

kernel: kernel BUG at mm/rmap.c:479
kernel: invalid operand:0000 [#1]

dmesg also shows this:

...
Brought up 2 CPUs
zapping low mappings.
checking if image is initramfs... it is
Freeing initrd memory: 482k freed
NET: Registered protocol family 16
PCI: PCI BIOS revision 2.10 entry at 0xf9f20, last bus=1
PCI: Using configuration type 1
mtrr: v2.0 (20020519)
mtrr: your CPUs had inconsistent fixed MTRR settings
mtrr: probably your BIOS does not setup all CPUs.
mtrr: corrected configuration.
...

i've googled these messages and they point to ram problems.

hivelocity.net claims to have done diagnostics on the box and that there were no problems reported.

they said this is a result of a sys configuration problem made by us.

any ideas?

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Kernel Headers For Virtuozzo Kernel
running centos/virtuozzo 2.6.18-028stab062.3

when i configure vmware it asks at one point for kernel header files. where would i find them to match the current kernel?

i asked at parallels forums but help there is very scarce. i checked openVZ repositories and they dont yet have headers for this version.

what are my options? i have one last windows machine left and want to run it in VMware.

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Mail Server Setup On Fedore Core 6 Server
for setup and configuration instructions for setting up mail server on a Fedora Core 6 server. I googled it and most of the links are described with steps while installing OS, but i need to configure a mail server on a server where my site is already running.

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Kernal Upgrade + Centos Upgrade
I have a server running cPanel.

At the moment, I am been hosted on an unmanaged server (dedicated).

My server provider is offering $25/hour for managed support.

My Kernal and Centos have not been updated for a while and I am looking to upgrade both of them. I am wondering how long would these 2 jobs normally take?

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Quad Core Processor Vs Intel Xeon 3060 Dual Core Conroe Processor
quad core processor vs Intel Xeon 3060 Dual Core Conroe Processor which is better any why?

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Dual Xeon3ghz 1mb Dual Core Vs Quadcore 6600 2.4ghzx4 Core 8mb
Which one you suggest for running database server and VPS's?

Dual Xeon3ghz 1mb dual core vs Quadcore 6600 2.4ghzx4 core 8mb.

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How Often To Upgrade Server?
how often should servers be upgraded. I've seen people offering hosting on servers over 4+ years old. Is there a good thumb of rule on this?

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When To Upgrade Server
I have centOS box with 1 x dual core CPU in it. The load average is between 1.5 and 3. When the traffic is on top the load average is between 2.5 - 3.5. Is it necessary to upgrade ? Server seems to be respond fast. Also I heard that Top command on centOS with dual core CPU doesn't show exact values.

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Upgrade The Server
i have a dual opteron 246 with 2G ram and 1000G BW

i need to move to better server

i have 25 proxy site and some SMF forums and some flash games sites

the load was less then 1 but now it,s 1.50 - 2

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Should I Upgrade Server
This server has 1gb of RAM. Is it require to add another 1gb of memory? This is screenshot from munin:

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Cannot Boot Server To New Kernel
We cannot figure out why our dedicated server will not boot to the correct kernel. I've removed all other options from grub.conf but it's still booting to the default CentOS setup.

grub.conf:

Code:
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You do not have a /boot partition. This means that
# all kernel and initrd paths are relative to /, eg.
# root (hd0,0)
# kernel /boot/vmlinuz-version ro root=/dev/mapper/ddf1_4c53492020202020808627c300000000378494a900000a28p1
# initrd /boot/initrd-version.img
#boot=/dev/mapper/ddf1_4c53492020202020808627c300000000378494a900000a28
default=0
timeout=5
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-028stab062.3)
root (hd0,0)
kernel /boot/vmlinux-2.6.18-028stab062.3 ro root=LABEL=/
initrd /boot/initrd-2.6.18-028stab062.3.img

Code:
uname -r
2.6.18-128.el5

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Kernel Issue On Server
I got this weird issue with a server, I have even contacted some server management companies as I ran out of ideas and ran out of things to try and fix it.

Lemme explain.
The server is a core2quad q6600, with 8gb ram. 2 velociraptor 300gb on raid1.

When I set the server up I had to wait on cpanel so I first went in and compiled a grsec kernel, 2.6.24.3 to be exact. Then I installed cpanel and everything else, have done the same exact procedures with countless other servers before, nothing special.

Have had this server around 10 months. It will only run right in the 2.6.24.3-grsec kernel. When you boot another kernel it will first boot very very slow, then when the server comes up everything is very very slow. Then the load will go up to like 100 with nothing special going on in the server. It;s like its loaded down like that just with basic startup functions. You will see things like service_start processes long after startup. Cpanel takes forever to start up if it does. The server is extremely slow and unusable, you are lucky if you can edit grub.conf real quick and set the default kernel back.

It does this on every kernel...Besides the 2.6.24.3-grsec which in that case it boots right up fine and dandy. It acts like a regular server then, performs good.

So any other kernel besides the 2.6.24.3-grsec simply wont work on it. There are no logs in messages, nothing like that. I looked into things that may have been built only for the 2.6.24.3-grsec kernel but couldn't really find anything that should have made such an impact.

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Kernel Panic --- Server Down
We have experienced a serious downtime of our server due to a "Kernel Panic" problem. The server stops responding to ping requests. When we accessed the console through IPMI, we saw a "Kernel Panic" error detailed here: [url]and [url]

We are running redhat RHEL 5.1

[root@host~]# uname -a
Linux host.com 2.6.18-92.1.1.el5PAE #1 SMP Thu May 22 09:16:17 EDT 2008 i686 i686 i386 GNU/Linux
[root@host~]#

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Server Does Not Boot New Kernel
on a RHE 3 system I installed a new Kernel. I did update lilo.conf and grub.conf but they are still booting an old kernel: 2.4.21-27.ELsmp. Please have a look at my files below and if you have any idea why please let me know.

lilo.conf:

prompt
timeout=50
default=2.4.21-53.ELsmp
boot=/dev/hda
map=/boot/map
install=/boot/boot.b
message=/boot/message
linear
image=/boot/vmlinuz-2.4.21-53.ELsmp
label=2.4.21-53.ELsmp
initrd=/boot/initrd-2.4.21-53.ELsmp.img
read-only
append="root=/dev/hda3"
image=/boot/vmlinuz-2.4.21-47.ELsmp
label=2.4.21-47.ELsmp
initrd=/boot/initrd-2.4.21-47.ELsmp.img
read-only
append="root=/dev/hda3"
image=/boot/vmlinuz-2.4.21-47.EL
label=2.4.21-47.EL
initrd=/boot/initrd-2.4.21-47.EL.img
read-only
append="root=/dev/hda3"
image=/boot/vmlinuz-2.4.21-27.ELsmp
label=linux
initrd=/boot/initrd-2.4.21-27.ELsmp.img
read-only
append="root=/dev/hda3"
image=/boot/vmlinuz-2.4.21-27.EL
label=linux-up
initrd=/boot/initrd-2.4.21-27.EL.img
read-only
append="root=/dev/hda3"
grub.conf:

Code:
default=0
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz
title Red Hat Enterprise Linux ES (2.4.21-53.ELsmp)
root (hd0,0)
kernel /vmlinuz-2.4.21-53.ELsmp ro root=/dev/hda3
initrd /initrd-2.4.21-53.ELsmp.img
title Red Hat Enterprise Linux ES (2.4.21-47.ELsmp)
root (hd0,0)
kernel /vmlinuz-2.4.21-47.ELsmp ro root=/dev/hda3
initrd /initrd-2.4.21-47.ELsmp.img
title Red Hat Enterprise Linux ES (2.4.21-47.EL)
root (hd0,0)
kernel /vmlinuz-2.4.21-47.EL ro root=/dev/hda3
initrd /initrd-2.4.21-47.EL.img
title Red Hat Enterprise Linux ES (2.4.21-27.ELsmp)
root (hd0,0)
kernel /vmlinuz-2.4.21-27.ELsmp ro root=LABEL=/
initrd /initrd-2.4.21-27.ELsmp.img
title Red Hat Enterprise Linux ES-up (2.4.21-27.EL)
root (hd0,0)
kernel /vmlinuz-2.4.21-27.EL ro root=LABEL=/
initrd /initrd-2.4.21-27.EL.img

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Server Goes Down With Kernel Panic
I have a cpanel server which goes down with a kernel panic.

In the messages files, i could find the below lines.

The kernel in the server is 2.6.9-55.0.12.ELsmp #1 SMP
h/w is 4 cpu Dual Core AMD Opteron(tm) Processor 265

Is this a kernel bug?

If yes , how can i solve it?

=====================================================
Nov 24 06:28:35 xxx kernel: eip: c0156874
Nov 24 06:28:35 xxx kernel: ------------[ cut here ]------------
Nov 24 06:28:35 xxx kernel: kernel BUG at include/asm/spinlock.h:133!
Nov 24 06:28:35 xxx kernel: invalid operand: 0000 [#1]
Nov 24 06:28:35 xxx kernel: SMP
Nov 24 06:28:35 xxx kernel: Modules linked in: md5 ipv6 parport_pc lp parport autofs4 i2c_dev i2c_core ip_conntrack_ftp ip_conntrack iptable_mangle iptable_filter ip_tables dm_mirror dm_mod button battery ac ohci_hcd ehci_hcd shpchp k8_edac edac_mc snd_intel8x0 snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore tg3 ext3 jbd sata_nv 3w_xxxx sata_sil libata sd_mod scsi_mod
Nov 24 06:28:35 xxx kernel: CPU: 2
Nov 24 06:28:35 xxx kernel: EIP: 0060:[<c02d51fb>] Not tainted VLI
Nov 24 06:28:35 xxx kernel: EFLAGS: 00010216 (2.6.9-55.0.12.ELsmp)
Nov 24 06:28:35 xxx kernel: EIP is at _spin_lock+0x1c/0x34
Nov 24 06:28:35 xxx kernel: eax: c02e8cb4 ebx: c0445164 ecx: e9147e5c edx: c0156874
Nov 24 06:28:35 xxx kernel: esi: c0445160 edi: 00000007 ebp: 00000000 esp: e9147e60
Nov 24 06:28:35 xxx kernel: ds: 007b es: 007b ss: 0068
Nov 24 06:28:35 xxx kernel: Process exim (pid: 8603, threadinfo=e9147000 task=f7a25330)
Nov 24 06:28:35 xxx kernel: Stack: 00000001 c0156874 00000000 fff8b500 10000000 f4f9922c c014e3f4 098a0004
Nov 24 06:28:35 xxx kernel: 00000001 00000002 fff8b500 f2f46684 00000000 c014e4a9 00000001 10000000
Nov 24 06:28:35 xxx kernel: 098a0004 f4f9922c f2f46640 00000002 fff8b500 d726e260 098a0004 c014ede1
Nov 24 06:28:35 xxx kernel: Call Trace:
Nov 24 06:28:35 xxx kernel: [<c0156874>] valid_swaphandles+0x42/0x6d
Nov 24 06:28:35 xxx kernel: [<c014e3f4>] swapin_readahead+0x18/0x57
Nov 24 06:28:35 xxx kernel: [<c014e4a9>] do_swap_page+0x76/0x2ea
Nov 24 06:28:35 xxx kernel: [<c014ede1>] handle_mm_fault+0x116/0x193
Nov 24 06:28:35 xxx kernel: [<c011b01b>] do_page_fault+0x1ae/0x5c6
Nov 24 06:28:35 xxx kernel: [<c012052d>] autoremove_wake_function+0x0/0x2d
Nov 24 06:28:35 xxx kernel: [<c0173889>] dnotify_parent+0x1b/0x6e
Nov 24 06:28:35 xxx kernel: [<c015b56a>] vfs_read+0xda/0xe2
Nov 24 06:28:35 xxx kernel: [<c015b75b>] sys_read+0x3c/0x62
Nov 24 06:28:35 xxx kernel: [<c011ae6d>] do_page_fault+0x0/0x5c6
Nov 24 06:28:35 xxx kernel: [<c02d719f>] error_code+0x2f/0x38
Nov 24 06:28:35 xxx kernel: Code: 00 75 09 f0 81 02 00 00 00 01 30 c9 89 c8 c3 53 89 c3 81 78 04 ad 4e ad de 74 18 ff 74 24 04 68 b4 8c 2e c0 e8 f9 d6 e4 ff 58 5a <0f> 0b 85 00 15 7d 2e c0 f0 fe 0b 79 09 f3 90 80 3b 00 7e f9 eb
Nov 24 06:28:35 xxx kernel: <0>Fatal exception: panic in 5 seconds
=====================================================

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Is this accurate? If so, where do quad core CPU's shine at this point in time?

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Today my server just crashed instantly... It was running fine with a load of 0.12 but then it went down all the sudden. After a reboot I checked the /var/log/messages file and saw this:

Code:
Mar 23 15:57:00 alpha kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000020
Mar 23 15:57:00 alpha kernel: printing eip:
Mar 23 15:57:00 alpha kernel: c017292b
Mar 23 15:57:00 alpha kernel: *pde = 2085d001
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Mar 23 15:57:00 alpha kernel: CPU: 0
Mar 23 15:57:00 alpha kernel: EIP: 0060:[<c017292b>] Not tainted VLI
Mar 23 15:57:00 alpha kernel: EFLAGS: 00010246 (2.6.9-42.0.3.ELsmp)
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Mar 23 15:57:00 alpha kernel: eax: c0446c40 ebx: ca05dd80 ecx: 0046ef00 edx: f1d95300
Mar 23 15:57:00 alpha kernel: esi: 00000000 edi: ca05dd80 ebp: f1d95300 esp: eb3f3fa0
Mar 23 15:57:00 alpha kernel: ds: 007b es: 007b ss: 0068
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Mar 23 15:57:00 alpha kernel: c02d47cb 0000020f 0046eff4 08cd4e6c bff65b64 bff65af0 bff615b8 00000006
Mar 23 15:57:00 alpha kernel: c02d007b 0000007b 00000006 0032a7a2 00000073 00000246 bff61598 0000007b
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Mar 23 15:57:00 alpha kernel: [<c015a7e5>] filp_close+0x49/0x5f
Mar 23 15:57:00 alpha kernel: [<c02d47cb>] syscall_call+0x7/0xb
Mar 23 15:57:00 alpha kernel: [<c02d007b>] packet_rcv+0x17e/0x307
Mar 23 15:57:00 alpha kernel: Code: 00 89 c3 85 d2 74 0e 8b 42 04 8b 12 25 ff ff ff 7f 09 c1 eb ee 89 8b 34 01 00 00 5b c3 55 89 d5 57 89 c7 56 53 8b 40 08 8
b 70 10 <0f> b7 46 20 25 00 f0 00 00 3d 00 40 00 00 75 4d 8d 46 68 e8 fb
Mar 23 15:57:00 alpha kernel: <0>Fatal exception: panic in 5 seconds
Mar 23 16:06:46 alpha syslogd 1.4.1: restart.
So it seems like httpd crashed my server? I checked the Apache error_log and noticed lines like these:

Code:
*** glibc detected *** free(): invalid pointer: 0x08872c98 ***
[Fri Mar 23 15:57:03 2007] [error] [client x.x.x.x] Premature end of script headers: /home/user/public_html/forum/index.php
[Fri Mar 23 15:57:03 2007] [error] [client x.x.x.x] File does not exist: /home/user/public_html/500.shtml
When I look at the whole error_log it seems like such errors appear frequently and for different websites and PHP applications. This isn't the only glibc error, there's also stuff like "*** glibc detected *** corrupted double-linked list: 0x088e0bb8 ***". I have recently installed eAccelerator and searched the web: I'm not the only one who has such problems with eAccelerator. Do you think these glibc errors may have caused the server to crash?

Also, lately I noticed a lot of lines like these in the /var/log/messages file:

Code:
Mar 23 15:47:45 alpha kernel: post_create: setxattr failed, rc=122 (dev=sda7 ino=4318565)
and

Code:
Mar 23 15:50:56 alpha ntpd[2958]: sendto(66.111.46.200): Operation not permitted
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Code:
/dev/sda7 198G 71G 118G 38% /home

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I nearly decided to shut down my operation due to frustration, but I decided to give it one more shot and decided to try a fully managed VPS at WiredTree. I will post my impressions in the VPS forum regarding WiredTree - but in short, WT is ** AWESOME **.

Yes - capitalized, italicized, bolded, underlined, and flanked with stars.

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