Install 32 Bit Pae Kernel On Centos
Apr 3, 2009
i have a 32bit centos running with 8 gigs, but only 7 is registering when i contacted support they told me
Your server does in fact have 8GB of physical memory however the reason it is not being recognized is due to the fact that you are using a 32 bit operating system. By default, the 8GB would be recognized if it were a 64 bit OS however on a 32 bit operating system, you must install and boot into the PAE kernel (physical address extension) for the 8GB to be recognized and utilized. The PAE kernel can be installed through yum when connected to your server as root over SSH. Once you have installed the kernel, you will need to reboot the server for these changes to take effect
i tried
yum pae install
yum pae kernel install
both didnt work can anyone give me a quick step by step guide on how to go about this.
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May 13, 2007
I am trying to install the kernel source.
I have downloaded kernel-2.6.20-1.2948.fc6.src.rpm
I am using fedora 6 64bit.
here are my current kernels:
kernel-headers-2.6.20-1.2948.fc6
kernel-devel-2.6.20-1.2944.fc6
yum-kernel-module-1.0.3-1.fc6
kernel-2.6.20-1.2944.fc6
kernel-devel-2.6.20-1.2948.fc6
kernel-2.6.20-1.2948.fc6
here is what I seen when I installed kernel-2.6.20-1.2948.fc6.src.rpm
rpm -ivh kernel-2.6.20-1.2948.fc6.src.rpm
1:kernel warning: user brewbuilder does not exist - using root
warning: group brewbuilder does not exist - using root
warning: user brewbuilder does not exist - using root
########################################### [100%]
warning: user brewbuilder does not exist - using root
warning: group brewbuilder does not exist - using root
then when I ran:
rpmbuild -bp --target=$(uname -m) /usr/src/redhat/SPECS/kernel-2.6.spec
I seen this error:
+ Arch=x86_64
+ make ARCH=x86_64 nonint_oldconfig
In file included from /usr/include/sys/socket.h:35,
from /usr/include/netinet/in.h:24,
from /usr/include/arpa/inet.h:23,
from scripts/basic/fixdep.c:117:
/usr/include/bits/socket.h:310:24: error: asm/socket.h: No such file or directory
make[1]: *** [scripts/basic/fixdep] Error 1
make: *** [scripts_basic] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.93770 (%prep)
I need to have this installed to get a app installed etc...
suggestions or ideas?
thanks
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Apr 29, 2007
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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Dec 23, 2008
I have a dedicated box with following specs
Core2Quad 2.4ghz
2x500gb hdd
8gb ram
I installed 32bit centos5 in it ( because I use lxadmin ;lxadmin wont support 64bit)
Installed kernel-PAE successfully and rebooted the server. but the server still boots into the old kernel. I need the kernel-PAE to be booted, then only I can utilize full RAM. help me . below there is ssh logs
[root@t241 ~]# cat /proc/meminfo
MemTotal: 3357036 kB
MemFree: 3204984 kB
Buffers: 8148 kB
Cached: 109516 kB
SwapCached: 0 kB
Active: 33504 kB
Inactive: 103664 kB
HighTotal: 2477180 kB
HighFree: 2343972 kB
LowTotal: 879856 kB
LowFree: 861012 kB
SwapTotal: 6409892 kB
SwapFree: 6409892 kB
Dirty: 16 kB
Writeback: 0 kB
AnonPages: 19524 kB
Mapped: 7608 kB
Slab: 7732 kB
SReclaimable: 3964 kB
SUnreclaim: 3768 kB
PageTables: 400 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 8088408 kB
Committed_AS: 45232 kB
VmallocTotal: 114680 kB
VmallocUsed: 3992 kB
VmallocChunk: 110560 kB
[root@t241 ~]# uname -rm
2.6.25.10 i686
[root@t241 ~]# cat /etc/grub.conf
default 1
timeout 7
color cyan/blue white/blue
title=CentOS (2.6.18-92.1.22.el5PAE)
root (hd0,1)
kernel /boot/vmlinuz-2.6.18-92.1.22.el5PAE root=/dev/sda2 pci=nommconf
initrd /boot/initrd-2.6.18-92.1.22.el5PAE.img
title=linux
root (hd0,1)
kernel /boot/vmlinuz root=/dev/sda2 pci=nommconf
[root@t241 ~]# rpm -qa | grep kernel
kernel-2.6.18-8.el5
kernel-PAE-2.6.18-92.1.22.el5
kernel-headers-2.6.18-8.el5
[root@t241 ~]#
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Apr 3, 2007
how can i recompile kernel for centos with following options
option IPFIREWALL,IPDIVERT,IPFIREWALL_FORWARD?
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Nov 1, 2009
I am using cpanel My server runs with centos 5 With version 2.6.18-164.2.1.el5.plus
Does i need to keep updating kernal updates always for the server?
If so how i can update automatically?
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May 21, 2009
I was Use Centos 64bit and when i install the openvz kernel and the openvzquota:
Quote:
yum -y install ovzkernel
yum -y install vzctrl vzquota vzpkg
I reebot my server and never boot up
I was planning to use a 8gb ram that's why i select 64bit.
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Apr 5, 2009
Is there a correct way to do it?
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Mar 29, 2009
I was wondering how I would go about ensuring my kernel is up to date on my vps. I am running centos and I have cpanel, so I am not sure if there is anything special that has to be done or avoided when running cpanel.
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Jul 30, 2008
how to read CPU Temperature on CentOS 4.6. and kernel 2.6.9 (CentOS kernel from yum)
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Jun 1, 2007
I've setup a CS game server running centos 4 but I'm looking to recompile it with 1000hz.
Does anyone have any links to newbie friendly guides on how to do this without any problems?
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Jun 9, 2007
When I try to compile kernel 2.6.19.2-grsec I get the following error.
kernel: irqbalance[1750]: segfault at 000001b202b70b20 rip 000001b2028f9cdb rsp 000077a8404178f0 error 6
kernel: grsec: signal 11 sent to /usr/sbin/irqbalance[irqbalance:1750] uid/euid:0/0 gid/egid:0/0, parent /bin/bash[bash:1749] uid/euid:0/0 gid/egid:0/0
I must have tryed to compile the kernel 20 different ways with or with out grsec and I still get the same irqbalance error.
My server is a
AMD Athlon 64 X2 4800+
2GB of DDR2 800 ram
x2 160GB hard drives soft ware raid 1
nvidia chipset mother board
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Nov 18, 2007
(The box, 2 years now, never had issues before all you will read...)
I do have a box at the IP xxx.xxx.xxx.xxx, which on 15th Nov. was: AMD 4200+
with 300 GB hdd for OS, and CentOS 4.5 on it...
Because the system was facing few load problems of wrong installed applications, we decided to do a fresh OS reload to the latest OS version and
cPanel.
on 16th Nov, the box was up and running with CentOS 5, and cPanel 11.
the kernel is: 2.6.18-8.1.15.el5
After few hrs the box was done and IO restored all backups in it anbd all worked fine, I realized that I couldnt access cPanel, page was blank for
everything.
Also, most pages (except simple html) where showing internal error 500.
I did a reboot. probelm was fixed.
After few hrs, problem came up again...
I left ssh logged in to see whats wrong.
I found out that every few hrs, that issue was happening:
Message from syslogd@server at Sun Nov 16 11:47:21 2007 ...
server kernel: journal commit I/O error
Then, we had techs to check HDD for errors. they did fsck, and said disk has to be replaced (at this point, without wanting to offend anyone, I have to state that 90% of techs in datacenters, or at least at mine --won't name them, 99% you guess which DC it is...-- are just low paid students that don't know SIMPLE things...) so we told them to replace the HDD and do OS reload in new drive...
So, on 17th Nov. we had online a new HDD, 400 GB with CentOS 5 loaded in it, and cPanel 11...
After few hrs and all working and backups recovered, the issue came up again!
This time, with exactly same error, techs told us it may be RAM, so they replaced the RAM and we waited...
In 2,5 hrs, bang, it happens again, same error.
They say, it might be the sata cable...
we replace it...
AGAIN ERROR.
we ask them to loook at it seriously, and after lot pressure, to avoid case that mo/bo or controller is wrong, they do upgrade us in a BRAND NEW colocated box, which was this time: Intel Core 2 DUO, 6300, with brand new 500 GB HDD and new RAM.
We recover in the new box the backups.
Box is online today at 18th Nov...
and the issue comes up again!
Message from syslogd@server at Sun Nov 18 11:47:21 2007 ...
server kernel: journal commit I/O error
I ask them what the **** is going on now and why after having all hardware replaced with new, and all OS reinstalled clean on new drives and new devices, 3 times, why we have again the same error...
And their response: power cable was loose, we replaced power cable...
Guys, sorry, this is really DUMP... loose cable cannot give that error...
and the error... continues!
Also, at this point, I have to let you know, that when this error comes up, (Message from syslogd@server at Sun Nov 18 11:47:21 2007 ...
server kernel: journal commit I/O error) the filesystem becomes READ-ONLY and
nothing gets affected, if we do a cold reboot by reset button, it comes up
again and all work PERFECT, until the issue comes back again.....
I am desperate with that, let me know what I have to do!
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Aug 1, 2009
i have a dedicated server with Centos 5.2 32bit.
my cpu is 64bit but for some software, datacenter install 32bit for me.
i need more ram and order to datacenter, before my ram was 4 Gig and now my ram is 6 gig . but cpu just use 3 gig of ram.
i install kernel-PAE with "yum install kernel-PAE " command and my ram down to 2.5 Gig. now my server used just 2.5 gig of ram.
i can not reformat server because of i have some vps in this server ( Xen vps )
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Jun 22, 2008
Just to make things clear, i am not new at setting up VPS nodes, i have set up all of my servers with the HyperVM/OpenVZ setup and they work perfectly, but im having a problem with a new server.
Just received my new server, installed HyperVM-Slave, rebooted but the OpenVZ kernel was not installed for some reason, so i manually installed the OpenVZ Kernel using the RPM as yum seemed to install the wrong kernel.
I then installed the kernel using RPM and got this error at the end of installation:
grubby: unable to open /dev/hda: No such file or directory
grubby: unable to open /boot/boot.b: No such file or directory
grubby fatal error: unable to find a suitable template
I have never encountered this error with any of my other servers before...
Also after installation everything seems to be correct. /etc/grub.conf has the new OpenVZ kernel displayed, and default is set to 0, so upon startup it should be booting the correct kernel, but the thing is, when i reboot the machine the default kernel is loaded even though the grub.conf is configured to load the OpenVZ Kernel.
Im thinking that this may be due to the error i got when installing the kernel.
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May 15, 2009
I'm not sure if anyone else has come across this but I'm sure you are all aware that CentOS 5.3 default kernel comes with realtek support.
But the default realtek drivers have a bug in them when it slows down upload and downloads drastically and shows ping times above 2000+ ms in the same datacenter.
A fix for this is simply upgrading the kernel to the latest version available (2.6.29) with realtek driver support.
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Apr 17, 2008
I installed CentOS 5 with SAS drive. But i forgot install kernel-PAE for more 4GB RAM. (i'm using 8GB RAM).
But now when i trying to install kernel-PAE or update kernel. I have issue with hda and fd0 ...
"WARNING: No module megasr found for kernel"
When i 'cat /var/log/messages' i got:
kernel: end_request: i/o error, dev fd0,sector 0
kernel: hda: packet command error: status=0x51 { DriveReady SeekComplete Error }
kernel: hda: packet command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
I tried to 'google' they to find the solution, but now i still not find out ...
I'll try to reload OS. After reload OS, if i dont have floppy disk, how can i update kernel with no error?
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Feb 18, 2008
I trying to compile new kernel on centos 5 and every time after "mkinitrd /boot/initrd-2.6.24.2.img 2.6.24.2" I have error:
No module uhci-hcd found for kernel 2.6.24.2, aborting.
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Oct 15, 2007
Can someone tell me which one is the latest stable kernel version available for centos 5 that should be running on the server?
Is
2.6.21.5-JS-grsec #1 SMP Thu Jul 12 20:38:34 CST 2007 i686 athlon i386 GNU/Linux.
Outdated?
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Nov 5, 2009
I want to install CentOS 5 on my VPS and my current template's don't have it. How do i do this? Or better still, if you have a template pre-made,
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Oct 25, 2009
I have installed Xen on my CentOS ded box, and now I'm trying to install a Guest OS, also CentOS using the following command:
Code:
virt-install -p --prompt -n CentOS2 -r 512 --file=/vm/centos.img --file-size=15 -l [url]
Now everything starts, I come to the network screen (right after the language selection), leave everything on default, it says it is trying to configure the network with DHCP for eth0 and then hangs there for a moment a does nothing.
How do I continue, how do I configure the network correcly.
I am just starting to learn Xen and would appreciate all the input I get.
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May 14, 2009
I tried to install clamav, but i'm out of luck. It won't install at all. it gives the folloing error:
Transaction Check Error:
file /etc/freshclam.conf from install of clamav-0.95.1-4.el5.rf.i386 conflicts with file from package clamav-toaster-0.95.1-1.3.27.i386 ....
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Apr 2, 2009
I try more time noting
root@serv01 [/opt]# ./j2eesdk-1_4_03-linux.bin
Checking available disk space...
Checking Java(TM) 2 Runtime Environment...
Extracting Java(TM) 2 Runtime Environment files...
Extracting installation files...
Launching Java(TM) 2 Runtime Environment...
Error: The Java(TM) Virtual Machine has aborted.
Deleting temporary files...
Deleting temporary files...
how can install java because i need to it
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Mar 21, 2008
I finally got my hands on a test server and am playing with Centos.
I got it installed but am not sure where to go from here in regards to getting it setup for web server use.
Is there any documentation on what to install for web server use? Is there a cheat sheet out there I can follow?
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Jun 1, 2008
Been fooling around with red5 too long now. I really need this app to work so I can use the audio/video option on my chat.
I'm willing to pay the person who can make red5 work on my linux centos server. I allready installed ant & red5, the java is just a bit to tricky for me.
Like I said, I'm willing to pay a fee for the person who can make the red5 work.
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Nov 19, 2008
I have a dedicated linux server and i want to install zimbra(open source mail server) on my server,i have googled and install it but it doesn't work..i can't login in to admin panel [url]but it throws page load error.
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Apr 2, 2008
im going to be installing centos 5.1 on a webserver. which packages should i install. ie when it gives the the options for kde knome server server with gui etc?
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Jan 31, 2008
I am using apachetop and it says in order to resolve host names (-r flag), adns must be installed. Host names aren't being resolved, so it appears I don't have adns, and I have googled but can't figure out where to get it and how to install it.
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May 23, 2007
i run cd home
wget -q [url] sh latest
but give me error
error: [url] : import read failed.
Your operating system's rpm update method (yum) was not able to locate the glibc package. This is an indication of an improper setup. You must correct this error before you can proceed.
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May 28, 2007
i reinstalled my vps that is virtuozzo
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May 12, 2009
I downloaded the latest 3dm2 software:
wget [url]
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The card is a 3ware 9690SA.
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