[Unit] Description=PTP: Synchronize two clocks After=ntpdate.service [Service] # added automatically, for details please see # https://en.opensuse.org/openSUSE:Security_Features#Systemd_hardening_effort ProtectSystem=full ProtectHome=true PrivateDevices=true ProtectHostname=true ProtectKernelTunables=true ProtectKernelModules=true ProtectKernelLogs=true ProtectControlGroups=true RestrictRealtime=true DeviceAllow=/dev/rtc # end of automatic additions Type=simple EnvironmentFile=-/etc/sysconfig/phc2sys ExecStart=/usr/sbin/phc2sys $OPTIONS [Install] WantedBy=multi-user.target