● 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
           └─disable-with-time-daemon.conf
   Active: active (running) since 金 2016-12-09 19:18:36 JST; 2h 31min ago
     Docs: man:systemd-timesyncd.service(8)
 Main PID: 520 (systemd-timesyn)
   Status: "Idle."
   CGroup: /system.slice/systemd-timesyncd.service
           └─520 /lib/systemd/systemd-timesyncd

12月 09 20:32:10 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.94.4:123 (ntp.ubuntu.com).
12月 09 20:32:20 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.89.198:123 (ntp.ubuntu.com).
12月 09 21:06:39 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.89.198:123 (ntp.ubuntu.com).
12月 09 21:06:49 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.89.199:123 (ntp.ubuntu.com).
12月 09 21:06:59 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.91.157:123 (ntp.ubuntu.com).
12月 09 21:07:10 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.94.4:123 (ntp.ubuntu.com).
12月 09 21:41:28 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.94.4:123 (ntp.ubuntu.com).
12月 09 21:41:38 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.89.198:123 (ntp.ubuntu.com).
12月 09 21:41:49 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.89.199:123 (ntp.ubuntu.com).
12月 09 21:41:59 ip-10-1-1-100 systemd-timesyncd[520]: Timed out waiting for reply from 91.189.91.157:123 (ntp.ubuntu.com).