Simple update script for Debian-based distribution (Debian, Ubuntu, etc)

update.sh

#!/usr/bin/sh
sudo apt update && sudo apt list --upgradable

echo 'Do you want to run the update? (Y/n)'
read INPUT

case $INPUT in
  n)
  echo 'Update cancelled.'
  exit
  ;;
esac

sudo apt upgrade && sudo apt autoremove && sudo snap refresh