Running a job once

You have to remove the auto_patch.sh cron job sometime after it runs, or else it will keep updating the system every week! For this, there exists another utility called at for that sole purpose; that is, to schedule to run a job just once.

We first need to install the at package:

root@ubuntu-linux:~# apt-get -y install at

Now you can schedule to run the auto_patch.sh script this coming Saturday at 01:00 AM with the following command:

root@ubuntu-linux:~# at 01:00 AM Sat -f /root/patch.sh

Remember, at jobs only run once, so after Saturday, the auto_patch.sh script will not run again.

You can learn more about at by reading its man page:

root@ubuntu-linux:~# man at