Update CentOS kernel to latest CentOS Plus
Use the following command to check your current Kernel version
root@server [~]# uname -r
2.6.18-348.6.1.el5
In order to update CentOS to CentOS Plus Kernel you would need to do the following:
First edit the your yum configuration repo for CentOS in [centos] section as following:
[root@server ~]# vi /etc/yum.repos.d/CentOS-Base.repo
[centosplus]
enabled=1
includepkgs=kernel*
Verify the changes as following:
root@server [~]# cat /etc/yum.repos.d/CentOS-Base.repo
# CentOS-Base.repo # # The mirror system uses the connecting IP address of the client and the # update status of each mirror to pick mirrors that are updated to and # geographically close to the client. You should use this for CentOS updates # unless you are manually picking other mirrors. # # If the mirrorlist= does not work for you, as a fall back you can try the # remarked out baseurl= line instead. # # [base] name=CentOS-$releasever - Base mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 #released updates [updates] name=CentOS-$releasever - Updates mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates #baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 #additional packages that may be useful [extras] name=CentOS-$releasever - Extras mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras #baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-$releasever - Plus mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus #baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/ gpgcheck=1 enabled=1 includepkgs=kernel* gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 #contrib - packages by Centos Users [contrib] name=CentOS-$releasever - Contrib mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib #baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/ gpgcheck=1 enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
root@server [~]# yum update kernel
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
* base: centos.netnitco.net
* centosplus: centos.netnitco.net
* extras: centos.netnitco.net
* updates: centos.netnitco.net
base | 1.1 kB 00:00
centosplus | 1.9 kB 00:00
centosplus/primary_db | 67 kB 00:00
extras | 2.1 kB 00:00
updates | 1.9 kB 00:00
Excluding Packages in global exclude list
Finished
Reducing CentOS-5 - Plus to included packages only
Finished
Skipping security plugin, no data
Setting up Update Process
Resolving Dependencies
Skipping security plugin, no data
--> Running transaction check
---> Package kernel.x86_64 0:2.6.18-348.6.1.el5.centos.plus set to be installed
--> Finished Dependency Resolution
Dependencies Resolved
==========================================================
Package Arch Version Repository Size
==========================================================
Installing:
kernel x86_64 2.6.18-348.6.1.el5.centos.plus centosplus 24 M
Transaction Summary
==========================================================
Install 1 Package(s)
Upgrade 0 Package(s)
Total download size: 24 M
Is this ok [y/N]: y
Downloading Packages:
kernel-2.6.18-348.6.1.el5.centos.plus.x86_64.rpm | 24 MB 00:07
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : kernel 1/1
Installed:
kernel.x86_64 0:2.6.18-348.6.1.el5.centos.plus
Complete!
Reboot the server to load the server with latest kernel.
Make sure that you have default=0 in /etc/grub.conf which will load the newer version of kernel after reboot.
