Time sync. is now controlled by systemd.
systemctl status systemd-timesyncd.service timedatectl timedatectl -a timesync-status timedatectl -a show-timesync cat /etc/systemd/timesyncd.conf
sudo mcedit /etc/systemd/timesyncd.conf
Example:
[Time] NTP=ntp.metas.ch ch.pool.ntp.org
METAS NTP time service : https://www.metas.ch/metas/en/home/fabe/zeit-und-frequenz/time-dissemination.html
METAS operates three public stratum 1 NTP servers in open access policy, namely:
ntp11.metas.ch
ntp12.metas.ch
ntp13.metas.ch
The alias ntp.metas.ch points to one of the above servers.
ntpdate is deprecated. Install sntp and use that instead:
sudo apt install sntp
sntp ch.pool.ntp.org