How to create cronjob in Centos 7

1. update all your system software to the latest version available

$ sudo yum update

2. Verify if cronie package is installed

$ sudo rpm -q cronie

3. Install cronie package

$ sudo yum install cronie

4. Check if crond service is running

$ sudo systemctl status crond.service

5. Configure cron jobs

$ sudo cat /etc/crontab

6. Create cronjob for current user

$ sudo vi /var/spool/cron/iphuong

6. Restart the crond service

$ sudo systemctl restart crond.service