无法设置 ntp:不支持 NTP

无法设置 ntp:不支持 NTP

Mu Ubuntu 20.04 存在时间同步问题。具体如下:

v@v-VirtualBox:~$ timedatectl
               Local time: Sat 2021-05-01 09:30:44 EEST
           Universal time: Sat 2021-05-01 06:30:44 UTC 
                 RTC time: Fri 2021-04-30 16:05:23     
                Time zone: Europe/Riga (EEST, +0300)   
System clock synchronized: no                          
              NTP service: n/a                         
          RTC in local TZ: no                          
v@v-VirtualBox:~$ sudo timedatectl set-ntp on
[sudo] password for v: 
Failed to set ntp: NTP not supported

我可以调试什么?

v@v-VirtualBox:~$ apt-cache policy ntp chrony openntpd
ntp:
  Installed: 1:4.2.8p12+dfsg-3ubuntu4.20.04.1
  Candidate: 1:4.2.8p12+dfsg-3ubuntu4.20.04.1
  Version table:
 *** 1:4.2.8p12+dfsg-3ubuntu4.20.04.1 500
        500 http://lv.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages
        500 http://security.ubuntu.com/ubuntu focal-security/universe amd64 Packages
        100 /var/lib/dpkg/status
     1:4.2.8p12+dfsg-3ubuntu4 500
        500 http://lv.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
chrony:
  Installed: (none)
  Candidate: 3.5-6ubuntu6.2
  Version table:
     3.5-6ubuntu6.2 500
        500 http://lv.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
     3.5-6ubuntu6 500
        500 http://lv.archive.ubuntu.com/ubuntu focal/main amd64 Packages
openntpd:
  Installed: (none)
  Candidate: 1:6.2p3-4
  Version table:
     1:6.2p3-4 500
        500 http://lv.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
v@v-VirtualBox:~$ 
v@v-VirtualBox:~$ dpkg -l ntp chrony openntpd
dpkg-query: no packages found matching chrony
dpkg-query: no packages found matching openntpd
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version                          Architecture Description
+++-==============-================================-============-==============>
ii  ntp            1:4.2.8p12+dfsg-3ubuntu4.20.04.1 amd64        Network Time P>
lines 1-6/6 (END)

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