File chronyd.service of Package chrony
[Unit] Description=Chrony NTP time syncronization daemon Documentation=man:chronyd(8) man:chrony.conf(5) http://chrony.tuxfamily.org/manual.html After=ntpdate.service sntp.service ntpd.service Conflicts=ntpd.service systemd-timesyncd.service ConditionCapability=CAP_SYS_TIME [Service] Type=simple Environment=CONF_FILE=/etc/chrony.conf USERNAME=ntp "ARGS=-r -s" EnvironmentFile=-/etc/sysconfig/chrony ExecStart=/usr/sbin/chronyd -n -f $CONF_FILE -u $USERNAME $ARGS ExecStop=/usr/bin/chronyc shutdown [Install] WantedBy=multi-user.target