To create a Cron job open the Cron job Manager and set the time interval you wish the job to run on:
Common Settings - This allows you to specify commonly used time intervals
Minute - Set this to the minute past the hour you wish the job to run on
Hour - Set this to the hour of the day you would like the job to run on
Day - Set the day of the week you wish the job to run on
Month - Set the month of the year you would like the job to run on
Weekday - This dropdown can be used to select the day(s) of the week you would like the job to run on.
If you want to be notified by e-mail when a cron job runs enter your e-mail address in the email field and click the Update E-Mail button.
If you do not want e-mail notifications from a particular cronjob then you can add >/dev/null 2>&1 to the end of the command