Cronjob allows you to configure regularly scheduled tasks so that the jobs can be run automatically at a pre-set point of time.
1. Navigate to your application server configuration directory from config icon of your Apache instance.
2. In the config tab navigate to the cron folder and open apache file.
3. Here you can enter all necessary commands to schedule your jobs.
Note: Make sure there is a blank line after the last cronjob entry.
The basic format of a crontab schedule consists of 6 fields, separated by spaces.
minute, hour, day, month, day-of-week, command-line-to-execute
For additional help please follow the below given link:
Also to create cron syntax online, use the below given link:
Crontab Code Generator: http://www.openjs.com/scripts/jslibrary/demos/crontab.php