Configure scheduled tasks
Moodle requires a cron task that must be run regularly. The administrator can do this from the Admin panel’s “Site Administration -> Notifications” menu. To run this task in the background, create a cron job.
To edit the crontab, run the following command:
$ sudo crontab -e
Add the following line to it:
*/15 * * * * sudo su daemon -s /bin/sh -c "/opt/bitnami/php/bin/php /opt/bitnami/apps/moodle/htdocs/admin/cli/cron.php > /dev/null"
This cron entry will run the script every 15 minutes.