[Unit]
Description=Force ntpdate to synchronise clock
Requires=networking.service
After=syslog.target networking.service dhcpcd.service
Before=lightdm.service

StartLimitIntervalSec=2
StartLimitBurst=100

[Service]
Type=oneshot
ExecStart=ntpdate ptbtime2.ptb.de ptbtime3.ptb.de
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=multi-user.target