===== Cron =====

==== What is Cron/ Crontab/ Cronjob? ====

[[https://en.wikipedia.org/wiki/Cron|Wikipedia - Cron]]

=== How to edit a cron ===

For global use, edit "/etc/cron.d/general"\\
For a specific user, execute "crontab -e" with that user.

<code>
 ┌───────────── 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
</code>

=== Commands ===

^  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  |
|  <code>for user in $(cut -f1 -d: /etc/passwd); do echo $user; crontab -u $user -l; done</code>  |  List crons of all users  |


=== Useful links ===

[[http://crontab-generator.org/|crontab-generator.org]]\\



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~~DISCUSSION:closed~~