1. crontab -e command automatically recognize if you have a syntax problem in the newly edited file: $ crontab -e crontab: installing new crontab "

1. crontab -e command automatically recognize if you have a syntax problem in the newly edited file: $ crontab -e crontab: installing new crontab "/tmp/crontab.QhkOLb/crontab":25: bad minute errors in crontab file, can't install. Do you want to retry the same edit? (y/n) 2. See better solutions (like Celery) below.