NTP Server : Configure NTP Client2021/04/28

	Configure NTP Client.
	NTP Client [systemd-timesyncd.service] is running by default on Ubuntu, so it's easy to set NTP Client. By the way, it's also possible to use NTPd or Chrony as a NTP Client. If you use them, simply set only NTP server to sync time, do not set permission to receive time sync requests from other Hosts.
[1]	Configure [systemd-timesyncd.service].

root@client:~#

systemctl status systemd-timesyncd

*  systemd-timesyncd.service - Network Time Synchronization
     Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; ve>
     Active: active (running) since Wed 2021-04-28 05:16:45 UTC; 1min 48s ago
       Docs: man:systemd-timesyncd.service(8)
   Main PID: 616 (systemd-timesyn)
     Status: "Initial synchronization to time server 91.189.89.199:123 (ntp.ubu>
      Tasks: 2 (limit: 4587)
     Memory: 1.4M
     CGroup: /system.slice/systemd-timesyncd.service
             +- 616 /lib/systemd/systemd-timesyncd

root@client:~#

vi /etc/systemd/timesyncd.conf

# add to the end : set NTP server for your timezone

NTP=dlp.srv.world

root@client:~#

systemctl restart systemd-timesyncd

root@client:~#

timedatectl timesync-status

       Server: 10.0.0.30 (dlp.srv.world)
Poll interval: 1min 4s (min: 32s; max 34min 8s)
         Leap: normal
      Version: 4
      Stratum: 2
    Reference: 3DCD7882
    Precision: 1us (-25)
Root distance: 8.093ms (max: 5s)
       Offset: +20.402ms
        Delay: 272us
       Jitter: 0
 Packet count: 1
    Frequency: +162.770ppm

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