CRONTAB v19-02-12 - Update

Image source: Willi Glenz - Screenshot Crontab

COMMANDS

$ ls /etc/cron*
# crontab -l
# crontab -e
$ crontab -u userxyz -e
> ┌──────────────── minute          (0 - 59) 
> │ ┌────────────── hour            (0 - 23) 
> │ │ ┌──────────── day of month    (1 - 31) 
> │ │ │ ┌────────── month           (1 - 12) 
> │ │ │ │ ┌──────── day of week     (0 - 6) Sunday to Saturday 
> │ │ │ │ │ 
> * * * * *         echo "Test" >> /tmp/crontest.txt
> 0 9 * * *         tar -zcf /var/backups/eclipse.tgz /home/userxyz/eclipse-workspace/
> 0 9 * * 4         rm -rf /home/userxyz/tmp/*
> 0 0 1,15 * *      echo "Test" >> /tmp/crontest.txt
> */10 * * * *      echo "Test" >> /tmp/crontest.txt
> 0 0-5 * * *       echo "Test" >> /tmp/crontest.txt
> 0 0 */2 * *       echo "Test" >> /tmp/crontest.txt
> */30 9/17 * * 1-5 echo "Test" >> /tmp/crontest.txt
> 0 12  *  *  *     /usr/sbin/tripwire --check

DAEMON

# service --status-all | less
# service cron status

PATHS

/etc/cron.hourly
/etc/cron.daily
/etc/cron.weekly
/etc/cron.monthly

FILES

$ view /etc/cron.allow
$ view /etc/cron.deny
$ view /etc/crontab

SOURCES

$ w3m crontab.guru
$ man cron
$ man -a crontab
$ man 5 crontab