How to update Kernel version on Centos 7
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To update latest kernel version on Centos 7
Linux kernel is one of the largest open source project with upgrading versions. Updating the latest kernel version on Centos 7 is explained in this manual.
Check the current kernel version using the following command.
[root@linuxhelp ~]# uname -r
3.10.0-123.el7.x86_64
Add the EPEL GPG key to enable the EPEL repository and EPEL repo fastest mirror using the below command.
[root@linuxhelp ~]# rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
Before installation process enable the epel repo using following command.
[root@linuxhelp ~]# rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
Retrieving http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
Preparing... ################################# [100%]
Updating / installing...
1:elrepo-release-7.0-2.el7.elrepo ################################# [100%]
Now enable the epel repo’ s fastest mirror using below command.
[root@linuxhelp ~]# yum install yum-plugin-fastestmirror -y
Loaded plugins: fastestmirror, langpacks
Determining fastest mirrors
* base: centos.webwerks.com
* elrepo: mirrors.thzhost.com
* extras: centos.webwerks.com
* updates: centos.webwerks.com
Resolving Dependencies
--> Running transaction check
---> Package yum-plugin-fastestmirror.noarch 0:1.1.31-24.el7 will be updated
---> Package yum-plugin-fastestmirror.noarch 0:1.1.31-34.el7 will be an update
--> Finished Dependency Resolution
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Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : " CentOS-7 Key (CentOS 7 Official Signing Key) < security@centos.org> "
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-0.1406.el7.centos.2.3.x86_64 (@anaconda)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Warning: RPMDB altered outside of yum.
Updating : yum-plugin-fastestmirror-1.1.31-34.el7.noarch 1/2
Cleanup : yum-plugin-fastestmirror-1.1.31-24.el7.noarch 2/2
Verifying : yum-plugin-fastestmirror-1.1.31-34.el7.noarch 1/2
Verifying : yum-plugin-fastestmirror-1.1.31-24.el7.noarch 2/2
Updated:
yum-plugin-fastestmirror.noarch 0:1.1.31-34.el7
Complete!
Start to install the latest kernel version.
[root@linuxhelp ~]# yum --enablerepo=elrepo-kernel install kernel-ml -y
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: centos.webwerks.com
* elrepo: mirrors.thzhost.com
* elrepo-kernel: mirrors.thzhost.com
* extras: centos.webwerks.com
* updates: centos.webwerks.com
Resolving Dependencies
--> Running transaction check
---> Package kernel-ml.x86_64 0:4.7.0-1.el7.elrepo will be installed
--> Finished Dependency Resolution
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Downloading packages:
kernel-ml-4.7.0-1.el7.elrepo.x86_64.rpm | 39 MB 00:09:12
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : kernel-ml-4.7.0-1.el7.elrepo.x86_64 1/1
Verifying : kernel-ml-4.7.0-1.el7.elrepo.x86_64 1/1
Installed:
kernel-ml.x86_64 0:4.7.0-1.el7.elrepo
Complete!
After the installation completes, reboot the system to use newer kernel version using the following command.
[root@linuxhelp ~]# uname -r
4.7.0-1.el7.elrepo.x86_64
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