How To Install And Configure NTP Server and Client on Ubuntu 20.04 LTS

It would be nice without the music actual do some explaining. You call this a Tutorial?

if i change time manual on linux..do my laptop android pc follow my own ntp server date and time

Thanks. I have done on Ubuntu 18 server as NTP Client its works fine. One Question this service "systemd-timesyncd" for default is Active. In what cases should we use "systemd-timesyncd"?

Thanks!

I wasn't able to do this on Ubuntu Server 20.04.1. I had to actually assign a password to root and then su - as root and run the command.