Documentation Index

The Official NTP documentation is distributed as HTML only. Manpages, or other forms of documentation, are maintained by third parties.

General Reference

• Official NTP Documentation - This is the primary body of NTP documentation.
• NTP Project and Reference Library - Includes informational slides, project background, a bibliography, and an executive summary, in addition to links to more information.
• NTP Support Web - A user-driven information collaboration tool for the NTP community.
• NTP FAQ - Volunteer maintained. Includes information on both the software distribution and on the protocol.
• NTP Release numbering scheme
• The Public NTP Server list - Where to get time from
• comp.protocols.time.ntp newsgroup
• NTP Related RFCs
• NTP-related definitions

Additional information

• Internetworking/NTP Research Laboratory - NTP Development Lab, University of Delaware
• Information on time and frequency services - Links to NTP servers and reference clocks, NTP software and documentation, time and frequency standard stations operated by U.S. and other countries, and time and frequency standard station transmission data are available here.
• Citations of clock sync literature

Outside resources

• National Institute of Standards and Technology - Time & Frequency Division
• Linux Clock mini-HOWTO
• Sun Blueprints - PDF Format
  • Using NTP to Control and Synchronize System Clocks - Part I: Introduction to NTP
  • Using NTP to Control and Synchronize System Clocks - Part II: Basic NTP Administration and Architecture
  • Using NTP to Control and Synchronize System Clocks - Part III: NTP Monitoring and Troubleshooting