Runs every half hour, on the hour and half past.
Every 30 minutes
*/30 * * * *
*/30 * * * *Equivalent to writing 0,30 * * * *. Both forms run at :00 and :30; the list form is worth preferring if your cron implementation has quirky step support.
| Field | Value | Meaning |
|---|---|---|
| Minute | */30 | Every 30th minute: 0, 30 |
| Hour | * | Every hour |
| Day of month | * | Every day of the month |
| Month | * | Every month |
| Day of week | * | Every day of the week |
The same breakdown for the schedules people reach for most.
* * * * *Every Minute*/5 * * * *Every 5 Minutes*/10 * * * *Every 10 Minutes*/15 * * * *Every 15 Minutes0 * * * *Every Hour0 */2 * * *Every 2 Hours0 */6 * * *Every 6 Hours0 0 * * *Every Day at Midnight0 9 * * *Every Day at 9 AM0 9 * * 1Every Monday at 9 AM0 9 * * 1-5Every Weekday at 9 AM0 0 * * 0Every Sunday at Midnight0 0 1 * *First Day of the Month0 0,12 * * *Twice a DayFrom the maker of MakeUUID