#!/bin/bash

BOOT_DIR="/boot/"
EVIL_PACKAGES="linux-image- linux-restricted-modules-"

[ -d "$BOOT_DIR" ] || exit 0

kernel_list=($(find "$BOOT_DIR" -name "vmlinuz-*" -printf "%P\n" |sort))
i=1
NUM_KERNELS="${#kernel_list[@]}"
while [ $i -lt ${NUM_KERNELS} ] ; do
   KERNEL_VER="${kernel_list[$i-1]##vmlinuz-}"
   PACKAGE_LIST=""
   for p in ${EVIL_PACKAGES} ; do
      PACKAGE_LIST="${PACKAGE_LIST} ${p}${KERNEL_VER}"
   done
   dpkg --purge ${PACKAGE_LIST} &> /dev/null || true
   (( i++ ))
done

exit 0