Crontab¶
Cron is most suitable for scheduling repetitive tasks. In RSPM we use the format to setup the sync, eviction, usage schedules and more.
Format¶
The crontab format is a string that consists of five characters. For example:
Min Hour Day Mon Weekday
* * * * * # command to be executed
┬ ┬ ┬ ┬ ┬
│ │ │ │ └─ Weekday (0=Sun .. 6=Sat)
│ │ │ └────── Month (1..12)
│ │ └─────────── Day (1..31)
│ └──────────────── Hour (0..23)
└───────────────────── Minute (0..59)
Examples¶
| Example | Description |
|---|---|
0 * * * * |
every hour |
*/15 * * * * |
every 15 mins |
0 */2 * * * |
every 2 hours |
0 0 * * 0 |
every Sunday midnight |
0 0 1 * * |
every first day of the month at midnight |