[Unit] Description=Synchronize system clock to NTP and PTP time sources After=chronyd.service ntpd.service ntpdate.service sntp.service network-online.target Conflicts=chronyd.service ntpd.service phc2sys.service ptp4l.service Wants=network-online.target [Service] Type=simple ExecStart=/usr/sbin/timemaster -f /etc/timemaster.conf [Install] WantedBy=multi-user.target