In this tutorial you will learn, how to add a cronjob with just one command to your crontab file.
This makes deploying virtual machines and their automatic configuration of Cronjobs easy!
(CRONTAB -L ; ECHO "0 4 * * * MYSCRIPT")| CRONTAB -
That is all you need! This command will be appended to your crontab files.
It is pretty handy for setting up cronjobs on fresh Ubuntu VMs without requiring root.