How to Maintain Specific Number of Kernel Packages on CentOS 8

Sometime due to less space on /boot partition need remove old kernel packages once new/updated kernel installed. The “installonly_limit” option in /etc/dnf/dnf.conf is used to maintain the number of kernel available. By default, the limit is set to 3 kernels in CentOS 8.

This article describes How to Maintain Specific Number of Kernel Packages on CentOS 8.

 

Step 1. DNF Configuration File: Run the following command to open and edit the dnf configuration file:

 

[root@linuxcnf ~]# vi /etc/dnf/dnf.conf [main] installonly_limit = 2 …………………….. …………………….. [root@linuxcnf ~]#

 

The “installonly_limit” should be more than 1. The limit is less than 2 gives error “Options Error parsing installonly_limit = 1 out of range integer value”. It should be set to minimum 2 to keep the running kernel if new kernel fails due to some reason, the system can boot with the old kernel.

 

Done!!! The above settings/configurations maintain number of kernel available on CentOS 8.