Remove unused headers on Ubuntu

remove-unused-headers.sh

#!/bin/sh

# Run the following command to run this script locally:
# sh -c "$(curl -sSL https://gist.github.com/olivertappin/1628438fbb9460743a9021cddd7221ce/raw)"

headers=$(dpkg --list | grep -E 'linux-image-[0-9]+\.[0-9]+\.[0-9]+-[0-9]+[0-9]+-generic' | awk {'print $2'} | grep -v `uname -r`)

echo "Current header: "
uname -r

echo ""

echo "Found the following unused headers:"

for header in $headers
do
    echo $header;
done

echo ""

echo "This program will remove the unused headers listed above."

read -p "Do you want to continue? [Y/n]" REPLY

echo ""

if [ "$REPLY" = "y" ] || [ "$REPLY" = "Y" ]
then
  for header in $headers
  do
    sudo apt-get purge -y $header
  done
  echo "Complete. Consider running `sudo apt autoremove` to remove unused headers from disk."
else
  echo "Not sure why you asked in the first place then... bye.";
fi