Clean old centos kernels

2016-02-03 - Clean old centos kernels
Tags: Centos rhel

The problem

Centos kernels tend to accumulate unless you clean them regularly.

The solution

There is a setting in /etc/yum.conf that does exactly that : installonly_limit=. The value of this setting is the number of older kernels that are kept when a new kernel is installed by yum. If the number of installed kernels becomes greater than this, the oldest one gets removed at the same time a new one is installed.

This cleaning can also be done manually with a command that belongs to the yum-utils package : package-cleanup –oldkernels –count=2