1- Check all the cron jobs running for logged in user
crontab -l
2- Create a new cron job
crontab -e
3- Using or viewing the cron job of the root user
sudo crontab -u root -l
4- Creating or editing the cron jobs of another user
sudo crontab -u <username> -e
Ubuntu/Mint/Debian
Check if the cron service is running
sudo service cron status
Start the cron service if it’s not already running(use one of the following commands)
sudo /etc/init.d/cron start
sudo service cron strat
Stop Cron Service (use one of the following commands)
sudo /etc/init.d/cron stop
sudo service cron stop
Restart Cron Service (use one of the following commands)
sudo /etc/init.d/cron restart
sudo service cron restart
Redhat (RHEL)/Fedora/CentOS/Rocky/Alma
Check if the cron service is running
systemctl status crond
Start the cron service if it’s not already running(use one of the following commands)
/etc/init.d/crond start
systemctl start crond.service
service crond start
Stop Cron Service (use one of the following commands)
/etc/init.d/crond stop
service crond stop
systemctl stop crond.service
Restart Cron Service (use one of the following commands)
/etc/init.d/crond restart
service crond restart
systemctl restart crond.service