Cron
A time-based job scheduler.
List crontabs
crontab -l
Create, or open, the crontab file.
crontab -e
Choose when you would like the job to run.
Every job is a line in your crontab file. The first 5 arguments specify the time to run the job, and the 6th argument is the command to run.
| arg position | meaning |
|---|---|
| 1 | Minute (0 - 59) |
| 2 | Hour (0 - 23) |
| 3 | Day of Month (1 - 31) |
| 4 | Month (1-12) |
| 5 | Day of Week (0 - 6) Sunday = 0 |
| 6 | Command |
e.g. every 30 min
*/30 * * * * /path/to/my_script.pl