4.3.7. Removing old kernels on CentOS and Fedora (freeing up space in / boot)
Warning!The kernel removal procedure is irreversible. Before uninstalling, be sure to test the current kernel for performance.
You can view a list of all installed kernels using the command:
rpm -q kernel
yum install yum-utils -y
Remove unnecessary kernels by running:
package-cleanup --oldkernels --count=2
--count=2 — the number of system cores that need to be left (in the example — 2).
To automatically remove kernels during an update, you must change the parameter
Warning!Cannot be greatly reduced
installonly_limit(especially below 2), as this can provoke situations in which the server will stop working after the update.