Clean up old, unused Linux Kernel version in Ubuntu

ubuntu-kernel-cleanup.sh

#!/bin/bash
#
# Clean up old, unused Linux Kernel version in Ubuntu
# ===================================================
#
# My system keeps running out of space on the boot partition as Ubuntu Linux
# does not remove unused Kernel version on a Kernel update. This small script
# will remove them for you. It's insipired by
# http://tuxtweaks.com/2010/10/remove-old-kernels-in-ubuntu-with-one-command/
#
# License
# =======
#
# The MIT License (MIT)
#
# Copyright (c) 2016 Valentin Sawadski
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
echo "Running Kernel: $(uname -r)"
echo
echo "Kernel Packages to be uninstalled:"
dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | grep -E "(image|headers)" | xargs apt-get --dry-run remove
echo
echo -n "Remove these Packages? Type \"yes\" and press [ENTER]: "
read IN
if [ "$IN" == "yes" ]; then
    dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | grep -E "(image|headers)" | xargs sudo apt-get -y purge
fi