For global use, edit “/etc/cron.d/general”
For a specific user, execute “crontab -e” with that user.
┌───────────── minute (0 - 59) │ ┌───────────── hour (0 - 23) │ │ ┌───────────── day of month (1 - 31) │ │ │ ┌───────────── month (1 - 12) │ │ │ │ ┌───────────── day of week (0 - 6) (Sunday to Saturday; │ │ │ │ │ 7 is also Sunday) │ │ │ │ │ │ │ │ │ │ * * * * * command to execute
| Command | Function |
|---|---|
| crontab -e | Edit crontab of the current user |
| crontab -l | List all crons of the current user |
| crontab -u <user> -e | Edit crontab of another user |
for user in $(cut -f1 -d: /etc/passwd); do echo $user; crontab -u $user -l; done | List crons of all users |