.. -*- coding: utf-8; -*-

=====
 NTP
=====
.. contents::
   :local:

What is NTP?
============

NTP is a protocol to synchronizing the clocks on host using publicly
available NTP servers.

Famous NTP servers
==================

Many Linux Distros provides time servers::

  0.debian.pool.ntp.org
  1.debian.pool.ntp.org
  2.debian.pool.ntp.org

Some big companies too::

  time.google.com

Or educational institutions::

  time.mit.edu

Or individuals and volunteers::

  us.pool.ntp.org
  ua.pool.ntp.org

https://developers.google.com/time/
  Free, global time service with leap-smeared time.
https://www.ntppool.org/en/
  Big virtual cluster of timeservers.

Under Debian
============

Install ``ntpdate`` package::

  $ sudo apt-get install ntpdate

and sync date with some NTP server::

  # sudo ntpdate 0.debian.pool.ntp.org

Under Windows
=============

See:

http://support.microsoft.com/kb/q216734/
  Windows Time Service Tools and Settings.
http://support.microsoft.com/kb/q223184/
  How to configure an authoritative time server in Windows 2000.
http://support.microsoft.com/kb/307897/
  How to synchronize the time with the Windows Time service in Windows XP.
http://support.microsoft.com/kb/216734/
  How to configure an authoritative time server in Windows 2000.