The Best Linux Program: yes

The program yes prints the word yes to your terminal until you cancel it, perhaps with 'Control + c'. Or technically it prints yes\n, meaning yes and then a new line (like pressing the Return key).

This is extremely powerful.

If you ever want to automatically install something which persistently nags you with do you want to do the thing? [y/N]?, then you can just pipe yes into that program, and it will answer 'yes' to all questions.

1yes | $INSTALL_SCRIPT_FILE.sh

This works best for disposable systems, like VMs or containers. Try this on a live system, and you might find out that you should have read that message fully.

1yes | yay