Automatically update CentOS 7 with yum-cron

  1. Install yum-cron:
    sudo yum -y install yum-cron
  2. Open /etc/yum/yum-cron.conf in your favorite editor and make sure each of the following values are set to ‘yes’.
    update_messages = yes
    download_updates = yes
    apply_updates = yes
  3. Other optional settings in yum-cron.conf
    # Change from 'default' to 'security'
    # if you only want security fixes.
    update_cmd = security
    # For email alerts (recommended):
    email_to = 
    # If you use a different mail host:
    email_host =
  4. Start the service:
    sudo systemctl start yum-cron
  5. Enable the service (makes sure it will start again after a reboot.)
    sudo systemctl enable yum-cron