This is a text-only version of the following page on https://raymii.org: --- Title : Remove unused CentOS/Red Hat kernels Author : Remy van Elst Date : 18-01-2014 URL : https://raymii.org/s/snippets/Remove_Old_CentOS_RHEL_Kernels.html Format : Markdown/HTML --- 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][1]

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You can check which kernels you have installed using the `rpm -q kernel` command: $ 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. In the `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][3] [1]: https://raymii.org/s/snippets/Remove_Old_Ubuntu_Kernels.html [2]: https://www.digitalocean.com/?refcode=7435ae6b8212 [3]: https://docs.fedoraproject.org/en-US/Fedora/14/html/Software_Management_Guide/ch07s03.html --- License: All the text on this website is free as in freedom unless stated otherwise. This means you can use it in any way you want, you can copy it, change it the way you like and republish it, as long as you release the (modified) content under the same license to give others the same freedoms you've got and place my name and a link to this site with the article as source. This site uses Google Analytics for statistics and Google Adwords for advertisements. You are tracked and Google knows everything about you. Use an adblocker like ublock-origin if you don't want it. All the code on this website is licensed under the GNU GPL v3 license unless already licensed under a license which does not allows this form of licensing or if another license is stated on that page / in that software: This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . Just to be clear, the information on this website is for meant for educational purposes and you use it at your own risk. I do not take responsibility if you screw something up. Use common sense, do not 'rm -rf /' as root for example. If you have any questions then do not hesitate to contact me. See https://raymii.org/s/static/About.html for details.