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Here is the typical field layout for a crontab entry (or multiple entries):
<prestyle="font-size:18pt">.---------------- minute (0 - 59)<br>| .------------- hour (0 - 23)<br>| | .---------- day of month (1 - 31)<br>| | | .------- month (1 - 12) (or jan,feb,mar,apr ...) <br>| | | | .---- day of week (0 - 6) (Sunday=0 or 7) <br> | | | | | (or sun,mon,tue,wed,thu,fri,sat)<br>| | | | |<br>* * * * * command to be executed<br>
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The asterisk (*) indicate to run for that unit of time. Below is an example of crontab entries:
