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Ivan
Asked: 2012-08-23 04:23:42 +0800 CST

How to configure NTP time synchronization on a server?

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I would like to configure my Ubuntu 12.04 server to synchronize its clock with a specific NTP server. Where to set this up?

server

2 Answers

  1. Installation

    Install via the software center

    or if you prefer command line ...

    sudo apt-get install ntp

    Configuration

    sudo nano /etc/ntp.conf

    This file will probably have the default Ubuntu server activated. You can check http://www.pool.ntp.org/zone/europe or http://www.pool.ntp.org/zone/north-america or http://www.pool.ntp.org/zone/asia for local (country based) servers. Just comment out all of the servers by adding a # in front of it and add in the one you want to use.

    Activating the new changes

    sudo service ntp restart

    Checking if it synchs

    sudo ntpq -c lpeer

    This will show a list of all the servers and when they where last checked. Random example from the web:

    enter image description here

    See logging

    sudo tail -f /var/log/syslog

    Do make sure, if you are using a firewall, to open UDP 123.

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  2. First, make sure that you have NTP installed, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command below.

    sudo apt-get install ntp

    Then edit the file below to add time servers.

    sudo nano /etc/ntp.conf

    To add time-servers to synchronize with, use USA Servers or Europe Servers.

    Then, restart NTP service

    sudo service ntp restart
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