#1
Run a command every minute
* * * * *
—
/path/to/command
Cron Job Examples
Extracted commands and schedules
Cron Syntax
A cron expression has 5 fields (in standard Vixie cron). Each field accepts numbers, ranges, lists, and steps.
| Field | Position | Allowed Values | Examples |
|---|---|---|---|
| Minute | 1st | 0–59 | 0, 15, 30, 45, */5 |
| Hour | 2nd | 0–23 | 0, 8, 12, 18, */2 |
| Day of Month | 3rd | 1–31 | 1, 15, 28, */10 |
| Month | 4th | 1–12 (or names JAN–DEC) | 1, 7, */3, JAN,JUL |
| Day of Week | 5th | 0–7 (0 or 7 = Sunday, or names SUN–SAT) | 1, 5, MON–FRI |
Special characters:
* = any value (wildcard).
Example: * * * * * runs every minute.
, = list of values.
Example: 0 8,16 * * * runs at 8:00 AM and 4:00 PM daily.
- = range of values.
Example: 0 9-17 * * * runs hourly from 9:00 AM through 5:00 PM.
/ = step values.
Example: */15 * * * * runs every 15 minutes (00, 15, 30, 45).
Note: Day-of-month and Day-of-week are treated as OR.
#2
Run a command every 5 minutes
*/5 * * * *
—
/path/to/command
#3
Run a command at 2:30 AM every day
30 2 * * *
—
/path/to/command
#4
Run a command at 4:00 AM every Sunday
0 4 * * 0
—
/path/to/command
#5
Run a command at 5:00 PM on the 1st day of every month
0 17 1 * *
—
/path/to/command
#6
Run a command every day at 12:00 noon
0 12 * * *
—
/path/to/command
#7
Run a command every hour between 9:00 AM and 5:00 PM
0 9-17 * * *
—
/path/to/command
#8
Run a command at midnight every day
0 0 * * *
—
/path/to/command
#9
Run a command on weekdays at 8:00 AM
0 8 * * 1-5
—
/path/to/command
#10
Run a command on the last day of every month
0 0 28-31 * *
—
[ "$(date +\%d -d tomorrow)" == "01" ] && /path/to/command
#11
Run a command every year on January 1st at midnight
0 0 1 1 *
—
/path/to/command
#12
Run a command every 15 minutes between 6:00 AM and 6:00 PM
*/15 6-18 * * *
—
/path/to/command
#13
Run a command every 30 seconds (using two cron jobs)
* * * * *
—
/path/to/command
* * * * *
—
sleep 30; /path/to/command
#14
Run a command on the first Monday of every month
0 0 1-7 * *
—
[ "$(date +\%u)" == "1" ] && /path/to/command
#15
Run a command every day at 6:00 AM and 6:00 PM
0 6,18 * * *
—
/path/to/command
#16
Run a command only in January and July at midnight
0 0 * 1,7 *
—
/path/to/command
#17
Run a command every 10 days
0 0 */10 * *
—
/path/to/command
#18
Run a command every two hours
0 */2 * * *
—
/path/to/command
#19
Run a command at 4:30 PM every Friday
30 16 * * 5
—
/path/to/command
#20
Run a command every 1st and 15th of the month
0 0 1,15 * *
—
/path/to/command