Setup a crontab file which defines whe the task should run:
m h d M D /script
where:
| m | minute: 0-59 |
| h | hour: 0-23 |
| d | day of the month: 1-31 |
| M | month of the year: 1-12 |
| D | day of the week, Sunday-0, 0-6 |
| /script | the script to execute |
Values that are not relevant can be replaced with a ‘*” character.
Examples:
Run scriptA at 1:00 am:
* 1 * * * /scriptA
Run scriptB at every 15 minutes past the hour:
15 * * * * /scriptB
Run scriptC on the hour and every 30 minutes past the hour:
0,30 * * * * /scriptC
Run scriptD at 10,11 and 12, every Monday:
* 10-12 * * 1 /scriptC
To install the crontab setings, run:
crontab filename
To list the current crontab settings:
crontab -l