Current File : //lib/systemd/system/yum-cron.service

[Unit]
Description=Run automatic yum updates as a cron job

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/touch /var/lock/subsys/yum-cron
ExecStop=/bin/rm -f /var/lock/subsys/yum-cron

[Install]
WantedBy=multi-user.target