SANnav NTPが機能しない

• NTPサービスを使用できません：

# timedatectl
            Local time: Fri 2024-09-20 15:15:59 UTC
       Universal time: Fri 2024-09-20 15:15:59 UTC
             RTC time: Fri 2024-09-20 15:15:59
            Time zone: Etc/UTC (UTC, +0000)
System clock synchronized: no
          NTP service: n/a
      RTC in local TZ: no

• NTPサービスが停止し、無効になります。

# systemctl status chronyd.service
● chronyd.service - NTP client/server
  Loaded: loaded (/usr/lib/systemd/system/chronyd.service; disabled; vendor preset: enabled)
  Active: inactive (dead)