In this Video, Step by Step Demonstration is being done regarding Installing NTP (Network Time Protocol) Server on Ubuntu 16.04.
Official Website: http://www.ntp.org/
Steps to Install and Synchronize Time via NTP Server on Ubuntu 16.04:
Step 1: Update the System
#apt-get update
Step 2: Install NTP Package
#apt-get install ntp
Step 3: Check the NTP Status
#service ntp status
Step 4: check the synchronization of ntp logs
#tail -f /var/log/syslog