Using systemd timesyn on Debian Stretch

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On systems like Debian Stretch with systemd the time sync is baked in but will not run if the legacy NTP package is installed at all so here is a howto/demo of what to do.

# apt-get purge ntp
# systemctl restart systemd-timesyncd.service
# systemctl status systemd-timesyncd.service 
● systemd-timesyncd.service - Network Time Synchronization
   Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled)
  Drop-In: /lib/systemd/system/systemd-timesyncd.service.d
   Active: active (running) since Fri 2017-08-11 10:09:11 CDT; 3s ago
     Docs: man:systemd-timesyncd.service(8)
 Main PID: 31413 (systemd-timesyn)
   Status: "Synchronized to time server ("
    Tasks: 2 (limit: 4915)
   CGroup: /system.slice/systemd-timesyncd.service
           └─31413 /lib/systemd/systemd-timesyncd

Aug 11 10:09:11 nodeone systemd[1]: Starting Network Time Synchronization...
Aug 11 10:09:11 nodeone systemd[1]: Started Network Time Synchronization.
Aug 11 10:09:11 nodeone systemd-timesyncd[31413]: Synchronized to time server (

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