A simple package update automation for GNU- Linux distros using apt commands:

Updating Manually

• Place the 'update.sh' file in /usr/bin/ folder.
• Open terminal and run update.sh

This updates the packages everytime you run the command in the terminal.

Automating the updation (Using cronjobs)

• Run crontab -e in the terminal.
• Add this line at the end 0 13 * * * /usr/bin/update.sh >/dev/null 2>&1
  • ctrl(command) + x to save,
  • 'Y' to confirm,
  • Enter to exit.

This executes the job in background, in this case the job is running update.sh, everday at 1 pm.

What is /dev/null 2>&1 tho?