# 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)
echo "@reboot echo hi" | crontab # adding tasks
crontab -e # open in editor
crontab -l [-u user] # list tasks
Operators
* # all values
, # separate individual values
- # a range of values
/ # divida a value into steps
Examples
0 * * * * # every hour
*/15 * * * * # every 15 mins
0 */2 * * * # every 2 hours
0 18 * * 0-6 # every week Mon-Sat at 6pm
10 2 * * 6,7 # every Sat and Sun on 2:10am
0 0 * * 0 # every Sunday midnight
@reboot # every reboot
