Cleanup your old Kernels after booting up the latest kernel

remove_old_kernel.sh

#!/usr/bin/env bash

##
## Cleanup your old Kernels after booting up the latest kernel.
## Source: https://docs.fedoraproject.org/en-US/quick-docs/dnf-system-upgrade/#sect-clean-up-old-kernels
##

old_kernels=($(dnf repoquery --installonly --latest-limit=-1 -q))
if [ "${#old_kernels[@]}" -eq 0 ]; then
    echo "No old kernels found"
    exit 0
fi

if ! dnf remove "${old_kernels[@]}"; then
    echo "Failed to remove old kernels"
    exit 1
fi

echo "Removed old kernels"
exit 0