cleanup-boot

cleanup-boot

#!/bin/bash
# this script will remove any stale kernel- and kernel-headers- packages
# it will keep the current (uname -r) and latest kernel package and its headers

SUDO=sudo

while [ -n "$1" ] ; do
   case "$1" in
      -h) echo "${0##*/} [ -h ] [ -n ]" ; exit 0 ;;
      -n) SUDO=echo ;;
      *) echo >&2 "unknown option $1"; exit 1 ;;
   esac
   shift
done

current="`uname -r`"
current="${current%-*}"

kernels=( $( dpkg -S /boot/vmlinuz-* | cut -d : -f 1 | sort -V ) )

latest="${kernels[-1]}"
latest="${latest#linux-image-}"
latest="${latest%-*}"

headers=( $( dpkg -l linux-headers-[0-9]\* | awk '/^.i/ { print $2 }' | sort -V ) )

echo "# current: $current"
echo "# latest:  $latest"

remove=()
for pkg in "${kernels[@]}" "${headers[@]}" ; do
   [[ $pkg =~ $current ]] && { echo >&2 "# keeping $pkg (current)" ; continue ; }
   [[ $pkg =~ $latest ]]  && { echo >&2 "# keeping $pkg (latest)" ; continue ; }
   remove+=( $pkg )
done

[ ${#remove[@]} = 0 ] && { echo >&2 "# nothing to remove" ; exit 0 ; }

$SUDO dpkg --remove ${remove[@]}