Question

This is the command I want to run:

00 03 * * * backup.sh

I understand that this will run the script backup.sh at 3am every morning. How can I add this cron command on my linux server using a bash script?

Answer 1

As root:

echo "00 03 * * * root backup.sh" >>/etc/crontab

or

echo "00 03 * * * root backup.sh" >/etc/cron.d/mybackupjob

As your own user:

crontab -l >tmp; echo "00 03 * * * backup.sh" >>tmp; crontab tmp; rm tmp