如何检查Ubuntu18.04中是否启用了NTP

Question

我已经安装了chrony，并试图从配置的NTP池中获取时间。我已经启用了NTP的时间数据。但是，如何确保从NTP服务器获取"date/timedatectl“命令上所看到的时间。在Ubuntu18.04timedatectl命令中，没有显示NTP同步细节。

/etc/chrony/chrony.chrony

pool time.google.com prefer iburst
keyfile /etc/chrony/chrony.keys
commandkey 1
driftfile /var/lib/chrony/chrony.drift
log tracking measurements statistics
logdir /var/log/chrony
maxupdateskew 100.0
dumponexit
dumpdir /var/lib/chrony
dumpdir /var/lib/chrony
logchange 0.5
hwclockfile /etc/adjtime
rtcsync

root@server-2:~# systemctl status chronyd
● chrony.service - chrony, an NTP client/server
   Loaded: loaded (/lib/systemd/system/chrony.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2020-11-11 12:16:13 IST; 43min ago
     Docs: man:chronyd(8)
           man:chronyc(1)
           man:chrony.conf(5)
  Process: 6228 ExecStartPost=/usr/lib/chrony/chrony-helper update-daemon (code=exited, status=0/SUCCESS)
  Process: 6202 ExecStart=/usr/lib/systemd/scripts/chronyd-starter.sh $DAEMON_OPTS (code=exited, status=0/SUCCESS)
 Main PID: 6226 (chronyd)
    Tasks: 1 (limit: 2318)
   CGroup: /system.slice/chrony.service
           └─6226 /usr/sbin/chronyd

Nov 11 12:16:13 server-2 systemd[1]: Starting chrony, an NTP client/server...
Nov 11 12:16:13 server-2 chronyd[6226]: chronyd version 3.2 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SECHASH 
Nov 11 12:16:13 server-2 chronyd[6226]: commandkey directive is no longer supported
Nov 11 12:16:13 server-2 chronyd[6226]: Frequency -88.224 +/- 0.493 ppm read from /var/lib/chrony/chrony.drift
Nov 11 12:16:13 server-2 systemd[1]: Started chrony, an NTP client/server.

sudo timedatectl set-ntp true

root@server-2:~# timedatectl 
                      Local time: Wed 2020-11-11 13:04:58 IST
                  Universal time: Wed 2020-11-11 07:34:58 UTC
                        RTC time: Wed 2020-11-11 07:34:58
                       Time zone: Asia/Kolkata (IST, +0530)
       System clock synchronized: yes
systemd-timesyncd.service active: yes
                 RTC in local TZ: no
root@server-2:~# 

对于timedatectl输出，不提供NTP同步的详细信息。那么，我们如何确认ntp是否已启用，而timedatectl是否与NTP服务器同步。

Answer 1

要查看chrony同步时钟的当前状态，请从chronyc -n tracking和chronyc -n sources开始。