How to Remove Old Kernels on Centos

If you want to remove old kernels for any reason you can follow below steps.

First, you need to install yum-utils package on your server to clean up older kernels and configure yum not to keep too many versions.

yum install yum-utils

Now, check the list of kernels that you have installed:

rpm -q kernel

Run below command to keep only two of the latest kernels

package-cleanup --oldkernels --count=2

To make the permanent changes when installing & updating kernels via yum command, edit /etc/yum.conf file with below line :

installonly_limit=2