1[Unit] 2Description=Precision Time Protocol daemon 3After=syslog.target network.target 4Before=time-sync.target 5Wants=time-sync.target 6Wants=phc2sys.service 7 8[Service] 9ExecStart=/usr/sbin/ptp4l -f /etc/linuxptp.cfg 10Restart=always 11 12[Install] 13WantedBy=multi-user.target 14