How Update Kernel
Jul 7, 2009can i upgrade my kernel?
yum cant find any new update but my kernel version is 2.6.18-128.1.1.el5.028stab062.3PAE
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Kernel Update With Yum
Jun 13, 2009I have following error in kernel update with yum:
Downloading Packages:
Running rpm_check_debug
ERROR with rpm_check_debug vs depsolve:
Package kernel conflicts with ecryptfs-utils < 44.
Complete!
So kernel not updated yet.
Kernel Update
May 8, 2008I installed CentOS 5 on a server with 2 quad core CPU's and 4GB of RAM. After the installation is done and during boot I see a warning that says "Warning only 3GB will be used".
So, just to check, I installed CentOS 4.4 and it sees all 4GB of RAM.
Are there any memory limitations on the distro? or could it be that the desktop kernels made their way into the iso's from upstream?
Kernel Update ..
Jul 6, 2008I just tried yum update command and now i have bunch of stuff that i need to update
=============================================================================
Package Arch Version Repository Size
=============================================================================
Installing:
kernel-PAE i686 2.6.18-92.1.6.el5 update 14 M
kernel-PAE-devel i686 2.6.18-92.1.6.el5 update 4.8 M
Updating:
kernel-headers i386 2.6.18-92.1.6.el5 update 846 k
nspr i386 4.7.1-1.el5 update 118 k
nss i386 3.12.0.3-1.el5.centos update 1.1
M
nss-tools i386 3.12.0.3-1.el5.centos update 2.2
M
samba-client i386 3.0.28-1.el5_2.1 update 4.9 M
samba-common i386 3.0.28-1.el5_2.1 update 8.7 M
xulrunner i386 1.9-1.el5 update 10 M
yelp i386 2.16.0-19.el5 update 580 k
Removing:
kernel-PAE-devel i686 2.6.18-53.1.21.el5 installed 14 M
Transaction Summary
=============================================================================
Install 2 Package(s)
Update 8 Package(s)
Remove 1 Package(s)
The big deal is Kernel is the most important update file IMHO. Because last time at another server i tried to update kernel by same method. And it said it failed to find template for Kernel or something like that. As a result my server didn't boot up and i had to request KVM and load older kernel
I am not sure if it will give same error this time but is there anything else that i need to do after kernel is updated except rebooting?
i just run /scripts/upcp and it updated all of the programs except kernel-pae. Now it says
Dependencies Resolved
=============================================================================
Package Arch Version Repository Size
=============================================================================
Installing:
kernel-PAE i686 2.6.18-92.1.6.el5 update 14 M
Transaction Summary
=============================================================================
Install 1 Package(s)
Update 0 Package(s)
Remove 0 Package(s)
I am still not brave enough to install kernel update
Any Update For Kernel
Sep 14, 2007My server ( Pentium4 3.80GHz with 2GB RAM ) have 2.6.9-55.ELsmp, is there any update?
View 4 Replies View RelatedCan't Update Kernel
Mar 15, 2007I'm trying to set up this server at Layeredtech without a control panel running CentOS 4.x with kernel 2.6.9-34.EL with PHP, MySQL, and lighttpd
I'm having problems with the current kernel (high IOwait, etc.) so I did a yum update kernel which installed 2.6.9-42.0.10.EL but whenever I reboot it doesn't go back up.
I don't know where to look for errors because when I type # reboot then I'm disconnected from shell and I see no errors whatsoever. Then I have to contact LT to do a manual reboot because I can't connect anymore.
I really need to update the kernel.
How Big Risk Do I Take If I Don't Update The Kernel?
May 2, 2008I'm a Windows guy and can little or nothing about Linux. How big risk do I take if I'm using a Linux VPS and never update/patch the kernel?
I'm using CentOS 5 and LxAdmin. I can update the control panel, but I can not update/patch the kernel since I have no knowledge how I do that.
I'm using a unmanaged plan, so no help there.
Some of my sites are running Wordpress, but I'm always using the lates WP installation. I not using any other plugins that WG2, Gallery2, and remove max width.
Nobody except me have access to the VPS, and I have no other FTP accounts or something like that on the VPS.
I have no other scripts or any kind of dynamic pages on my VPS.
What kind of risk do I have here?
I'm currently having plans to cancel my second VPS that's using Win2003, and only use Linux in the future. I can cut my monthly expensive with 50% that way, but do I take a big risk doing it that way?
Kernel Update Needed For Centos 5
Nov 1, 2009I 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?
HOW TO: CentOS Issue .. Kernel Update - SAS Drive
Apr 17, 2008I 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?
[kernel: Kernel BUG At Mm/rmap.c:479] Any Idea What This Is?
Mar 29, 2007we 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?
Kernel Headers For Virtuozzo Kernel
May 20, 2009running 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.
Centos + Kernel 2.6.9-34.0.2- How To Upgrade Kernel
Apr 29, 2007Last 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.
Kernel Source Install Help Needed On Fc6 X64I Am Trying To Install The Kernel Source.
May 13, 2007I 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
Xen Kernel
Apr 4, 2009I have a Xen VPS. I started with a Debian 4 image and have since upgraded to Debian 5. Firstly was this advisable? Secondly what Kernel version should I be running, or rather is it set by my installation or by the Xen server?
View 3 Replies View RelatedNew Kernel 2.6
Feb 15, 2007Does it take 2 hours to have a new kernel up and running? The tech is taking forever to finish.
View 11 Replies View RelatedKernel Tuning
Apr 24, 2009as part of a project I have lately been looking into various aspects of kernel tuning. Most notably lately tuning the TCP stack for more efficient memory usage/throughput.
Thought I would start this thread to mention some of the tools I'd found for doing testing and see what anyone else had to recommend.
So far my favorite of the bunch is nuttcp. Its easy to use and gives a very good idea of how much of your bandwidth you are able to utilize.
A few interesting web pages are as follows for anyone interested in the topic:
[url]- Tuning TCP for High Bandwidth Delay networks
[url]- TCP Tuning Cook book, some interesting information in there as well
[url]...formanceTuning - Performance Tuning TWiki. Has a list of useful tools, flags for existing tools and ways to monitor network performance from a system level, along with some suggestions of things to correct
Kernel Drives
Aug 4, 2009What is the best way to find out which filesystems and harddrive drivers you can remove? Obviously, i need ext2,3 but how do you find which HD you only need?
View 1 Replies View RelatedKernel: Ata1.00
Jun 15, 2009recently,my dedicated server down frequently,
i can not find any important info from /var/log/messages
but i find some records many time on it,those like
----------------------------------
Jun 15 05:30:40 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:40 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:40 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:40 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:40 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:40 server kernel: ata1: EH complete
Jun 15 05:30:42 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:42 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:42 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:42 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:42 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:42 server kernel: ata1: EH complete
Jun 15 05:30:44 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:51 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:51 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:51 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:51 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:51 server kernel: ata1: EH complete
Jun 15 05:30:51 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:51 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:51 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:51 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:51 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:51 server kernel: ata1: EH complete
Jun 15 05:30:51 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:51 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:51 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:51 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:51 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:52 server kernel: ata1: EH complete
Jun 15 05:31:26 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:31:30 server kernel: sd 0:0:0:0: SCSI error: return code = 0x08000002
Jun 15 05:31:33 server kernel: sda: Current [descriptor]: sense key: Medium Error
Jun 15 05:31:36 server kernel: Add. Sense: Unrecovered read error - auto reallocate failed
Jun 15 05:31:36 server kernel:
Jun 15 05:31:39 server kernel: Descriptor sense data with sense descriptors (in hex):
Jun 15 05:31:46 server kernel: 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
Jun 15 05:31:51 server kernel: 2c d2 23 42
Jun 15 05:31:56 server kernel: end_request: I/O error, dev sda, sector 751969090
Jun 15 05:31:57 server kernel: ata1: EH complete
Jun 15 05:31:57 server kernel: SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
Jun 15 05:31:58 server kernel: sda: Write Protect is off
Jun 15 05:31:58 server kernel: SCSI device sda: drive cache: write back
Jun 15 05:31:59 server kernel: SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
Jun 15 05:32:03 server kernel: sda: Write Protect is off
Jun 15 05:32:04 server kernel: SCSI device sda: drive cache: write back
-------------------
is it safe ? or any hardware error?
Kernel Compile
Jun 20, 2009I copied the default config file and renamed it as .config but I get this:
Code:
WARNING: No module dm-mem-cache found for kernel 2.6.27.10-grsec, continuing anyway
WARNING: No module dm-region_hash found for kernel 2.6.27.10-grsec, continuing anyway
WARNING: No module dm-message found for kernel 2.6.27.10-grsec, continuing anyway
WARNING: No module dm-raid45 found for kernel 2.6.27.10-grsec, continuing anyway
Which Kernel To Upgrade?
Jul 20, 2009My 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.
View 2 Replies View RelatedYum Install Kernel-PAE
Aug 1, 2009i 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 )
2 Kernel Compile
Jul 12, 2009when doing 2.6.26+ or w/e it is, how do you enable conntrack, what options do i need to enable under make menuconfig?
net.netfilter.nf_conntrack_acct = 1
net.netfilter.nf_conntrack_generic_timeout = 120
error: "net.netfilter.nf_conntrack_icmp_timeout" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_close" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_time_wait" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_last_ack" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_close_wait" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_fin_wait" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_established" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_syn_recv" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_syn_sent" is an unknown key
error: "net.netfilter.nf_conntrack_udp_timeout" is an unknown key
error: "net.netfilter.nf_conntrack_udp_timeout_stream" is an unknown key
net.netfilter.nf_conntrack_max = 262144
and how do i know which hardware/devices that i can remove?
Troubleshooting Kernel
Jul 24, 2009I have a FreeBSD server crashing a few times per week sometimes 2 or 3 times in one day, then 3 days fine sometimes each other day...
/var/log/messages shows nothing related to the reboot when looking at the server screen after a crash, it showed kernel panic
any ideas on how to troubleshoot that with the minimum downtime possible? DC already tried swapping memory, but it didn't solve
How To Upgrade Kernel
May 12, 2008I 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 ?
Kernel Compiling
Dec 24, 2008I've never actually compiled a kernel before, and wanted to know the basics when it comes to compiling for a standard CPanel/Centos 32bit system.
View 10 Replies View RelatedGrub And Kernel
Jul 9, 2008i compiled my kernel and i have problem.. i dont have lilo on my server so i dont know how to change the grub.conf file to boot my new kernel..
View 7 Replies View RelatedKernel Exploit
Jun 28, 2008How Can i translate An Kernel Exploit to secure my server like that
[url]
how can i now what i do to my server if i see any exploit