the time-synchronization does not work on my Ubuntu 20.04 (it always shows a time two hours ahead of the actual time). I have tried to follow the hints here and here but without success.
I have already installed ntp, but when I run
timedatectl set-ntp on
in the terminal I get the output:
Failed to set ntp: NTP not supported
It drives me crazy because even when I set the time manually, it reverts to the old (and wrong) setting after restart.
Any hint is greatly appreciated!
You have probably selected wrong time zone.
Also, if the system is not going to be used as a time server, the ntp daemon is not recommended in recent versions of Ubuntu. Instead, systemd-timesyncd daemon should be used.
Please,
Run sudo apt remove ntp to remove ntp.
Run sudo apt install --reinstall systemd-timesyncd to refresh systemd-timesyncds installation.
Run sudo dpkg-reconfigure tzdata to select the correct time zone.
Afterwards, run cat /etc/timezone to check it.
Run, timedatectl status to check that:
System clock synchronized: yes
NTP service: active
RTC in local TZ: no
Note: If you are not dual booting (with Windows) you should set the hardware clock to UTC (i.e., RTC in local TZ: no in the above output), using the command timedatectl set-local-rtc 0 --adjust-system-clock. For more information see this:
How to tell Ubuntu that hardware clock is local time?
Run, systemctl status systemd-timesyncd to check that systemd-timesyncd daemon is:
Active: active (running) since ...
If it is not active, run systemctl enable systemd-timesyncd to enable it and systemctl restart systemd-timesyncd to start it.
If you get errors in the above commands, you may need to run:
$ timedatectl set-ntp false
$ ## set approximate time manually using the `date` command.
$ timedatectl set-ntp true
and retry from step 5.
Reboot system and check once more.
