NTP設定に、Chronyをを利用しています。
WebUI 日付・時刻設定 のページでも設定できます。

設定ファイル/etc/chrony/chrony.conf を編集します。

chrony.conf

#
# chrony.conf generated by MA-Series Web Application Server
#
driftfile /var/lib/chrony/chrony.drift
server ntp.nict.jp iburst trust
server ntp1.jst.mfeed.ad.jp iburst trust
keyfile /etc/chrony/chrony.keys
logdir /var/log/chrony
# Stop bad estimates upsetting machine clock.
maxupdateskew 100.0
rtcsync
makestep 1 3
allow

停止している場合は「Active: inactive (dead)」と表示されます。

root@metis:~# systemctl status chrony.service
○ chrony.service - chrony, an NTP client/server
     Loaded: loaded (/lib/systemd/system/chrony.service; disabled; vendor prese>
     Active: inactive (dead)
       Docs: man:chronyd(8)
             man:chronyc(1)
             man:chrony.conf(5)

Chronyを起動します。

root@metis:~# systemctl start chrony.service

状態を確認し、「Active: active (running)」から、起動している事が確認出来ます。

root@metis:~# systemctl status chrony.service
● chrony.service - chrony, an NTP client/server
     Loaded: loaded (/lib/systemd/system/chrony.service; disabled; vendor prese>
     Active: active (running) since Tue 2024-01-30 12:25:08 JST; 5s ago
       Docs: man:chronyd(8)
             man:chronyc(1)
             man:chrony.conf(5)
    Process: 751 ExecStart=/usr/lib/systemd/scripts/chronyd-starter.sh $DAEMON_>
   Main PID: 760 (chronyd)
      Tasks: 2 (limit: 2227)
     Memory: 9.8M
        CPU: 496ms
     CGroup: /system.slice/chrony.service
             tq760 /usr/sbin/chronyd -F 1
             mq761 /usr/sbin/chronyd -F 1

Jan 30 12:25:07 metis systemd[1]: Starting chrony, an NTP client/server...
Jan 30 12:25:08 metis chronyd[760]: chronyd version 4.2 starting (+CMDMON +NTP >
Jan 30 12:25:08 metis chronyd[760]: Loaded seccomp filter (level 1)
Jan 30 12:25:08 metis systemd[1]: Started chrony, an NTP client/server.

本装置の起動時に、Chronyを自動起動するように設定します。

root@metis:~# systemctl enable chrony.service
Synchronizing state of chrony.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable chrony
Created symlink /etc/systemd/system/chronyd.service → /lib/systemd/system/chrony.service.
Created symlink /etc/systemd/system/multi-user.target.wants/chrony.service → /lib/systemd/system/chrony.service.

再起動後にChronyが起動している事が確認出来ます。

root@metis:~# systemctl status chrony.service
● chrony.service - chrony, an NTP client/server
     Loaded: loaded (/lib/systemd/system/chrony.service; enabled; vendor preset>
     Active: active (running) since Tue 2024-01-30 12:34:51 JST; 42s ago
       Docs: man:chronyd(8)
             man:chronyc(1)
             man:chrony.conf(5)
    Process: 497 ExecStart=/usr/lib/systemd/scripts/chronyd-starter.sh $DAEMON_>
   Main PID: 579 (chronyd)
      Tasks: 2 (limit: 2227)
     Memory: 9.8M
        CPU: 602ms
     CGroup: /system.slice/chrony.service
             tq579 /usr/sbin/chronyd -F 1
             mq587 /usr/sbin/chronyd -F 1

Jan 30 12:34:49 metis systemd[1]: Starting chrony, an NTP client/server...
Jan 30 12:34:51 metis chronyd[579]: chronyd version 4.2 starting (+CMDMON +NTP >
Jan 30 12:34:51 metis chronyd[579]: Loaded seccomp filter (level 1)
Jan 30 12:34:51 metis systemd[1]: Started chrony, an NTP client/server.