Two more things:
fires up your favorite editor. By default that is vi/vim. If that happens not to be your favorite editor: you quit that with ESC-:q!
. People have been resetting their computer because they could not think of something that obvious.
If you want a different editor, like nano, issue this command:
Or you can edit that in your ~/.bashrc.
Second, the 'e' happens to be next to the 'r' on your keyboard. When you accidently
hit crontab -r
instead of crontab -e
your crontab is wiped out. Very convenient.
And no, I don't make backups of my clients, only servers.