SHELL=/bin/bash PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root For details see man 4 crontabs Format Format 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) Operators Operator Description * all values , separate individual values - a range of values / divide a value into steps Examples Example Description 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 Crontab # Adding tasks easily echo "@reboot echo hi" | crontab # Open in editor crontab -e # List tasks crontab -l [-u user]
