Raymii.orgQuis custodiet ipsos custodes?
Home | About | All pages | Cluster Status | RSS Feed | Gopher
Remove unused CentOS/Red Hat kernels
Published: 18-01-2014 | Author: Remy van Elst | Text only version of this article
❗ This post is over nine years old. It may no longer be up to date. Opinions may have changed.
This small article will show you how to remove unused kernels in Red Hat or CentOS. This is sometimes necessary because the /boot partition can fill up.
Are you running Ubuntu and want to clean up kernels? See this article: https://raymii.org/s/snippets/Remove Old Ubuntu_Kernels.html
I'm developing an open source monitoring app called Leaf Node Monitoring, for windows, linux & android. Go check it out!
Consider sponsoring me on Github. It means the world to me if you show your appreciation and you'll help pay the server costs.
You can also sponsor me by getting a Digital Ocean VPS. With this referral link you'll get $100 credit for 60 days.
You can check which kernels you have installed using the
rpm -q kernel
$ rpm -q kernel kernel-2.6.18-348.16.1.el5 kernel-2.6.18-348.18.1.el5 kernel-2.6.18-371.el5 kernel-2.6.18-371.1.2.el5 kernel-2.6.18-371.3.1.el5
As you can see this is a CentOS 5 box.
yum-utils package there is the
package-cleanup command. This command,
among other things, lets you remove older kernels very simple. First install it:
yum install yum-utils
With the following command you can clean up all old kernels and keep just two. The current one and the previous one:
package-cleanup --oldkernels --count=2
The Fedora Documentation has more info and various good examples on the
package-cleanup command: https://docs.fedoraproject.org/en-
US/Fedora/14/html/Software Management Guide/ch07s03.html