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~-[[DebianWiki/EditorGuide#translation|Translation(s)]]: English - [[es/NTP|Español]] - [[it/NTP|Italiano]]-~ ##For Translators - to have a constantly up to date translation header in you page, you can just add a line like the following (with the comment's character at the start of the line removed)
##<<Include(NTP, ,from="^##TAG:TRANSLATION-HEADER-START",to="^##TAG:TRANSLATION-HEADER-END")>>
##TAG:TRANSLATION-HEADER-START
~-[[DebianWiki/EditorGuide#translation|Translation(s)]]: [[NTP|English]] - [[es/NTP|Español]] - [[it/NTP|Italiano]] - [[pt_BR/NTP|Português (Brasil)]] - [[uk/NTP|Українська]]-~
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Network Time Protocol. This will keep you system date with exact match to actual date. Network Time Protocol. This will make your system date match actual date, by synchronizing with network time servers.

{i} systemd-timesyncd acts as a NTP client even when no network is available. This is enough to synchronize a system. NTP deamon is required only when a NTP '''server''' is required. See [[https://www.freedesktop.org/software/systemd/man/systemd-timesyncd.service.html| Freedesktop.org's page on timesyncd]] for more details
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 * Type '''date''' again to see if the time changed. You time should be synced in a next minute.  * Type '''date''' again to see if the time changed. Your time should be synced in a next minute.
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 * {{{pool.ntp.org}}} - This points to a random worldwide time server.
 * {{{europe.pool.ntp.org}}} - This points to a random European time server.
 * {{{uk.pool.ntp.org}}} - This points to a random United Kingdom based time server.

The Debian package will install a default set of time servers which should be good for most typical client installations. However you may customize this for your network location. A good source of NTP pool information is the NTP Pool Project.

 * https://www.pool.ntp.org/

== See also ==

=== Debian-specific information ===

 [[DebianPkg:ntp|ntp]]

 [[DebianBug:ntp|Bugs]]

 [[DebianMan:ntpd|Manual page]]

 [[https://security-tracker.debian.org/tracker/source-package/ntp|Security Bug Tracker]]

=== Upstream specific information ===

  [[https://support.ntp.org/bin/view/Main/WebHome|Homepage]]

  [[https://bugs.ntp.org/index.cgi|Bugs & Issues]]

  [[https://support.ntp.org/bin/view/Main/DocumentationIndex|Documentation Index]]

=== Other information ===

  [[WikiPedia:Network Time Protocol|NTP on wikipedia]]
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## You can add other _helpful_ links here.
##See also:
## If this page belongs to an existing Category, add it below.
CategoryNetwork

CategoryNetwork CategorySoftware CategorySystemAdministration CatgeoryTime

Translation(s): English - Español - Italiano - Português (Brasil) - Українська


NTP

Network Time Protocol. This will make your system date match actual date, by synchronizing with network time servers.

{i} systemd-timesyncd acts as a NTP client even when no network is available. This is enough to synchronize a system. NTP deamon is required only when a NTP server is required. See Freedesktop.org's page on timesyncd for more details

Install and Configure

  • Type date to see current date and time. (Use -R to get a standard unambiguous format. Locale specific timezones are ambiguous.)

date -R
  • Install NTP

aptitude install ntp
  • Done.
  • Type ntpq -p to see servers you are syncing with.

  • Type date again to see if the time changed. Your time should be synced in a next minute.

  • Done.

Troubleshooting

  • If you run ntpq -p and you get

No association ID's returned
  • Run

dpkg-reconfigure ntp
  • And then again:

ntpq -p

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 ntp.pbx.org     xx.xxx.xxx.xxx   2 u    -   64    1   33.763  1799619   1.054
 xray.metadom.co xx.xxx.xxx.xxx   2 u    1   64    1   40.367  1799619   0.001
 hydrogen.cert.u xx.xxx.xxx.xxx   2 u    -   64    1   64.740  1799619   0.001
 mirror          .INIT.          16 u    -   64    0    0.000    0.000   0.001

Public Internet Time Servers

The Debian package will install a default set of time servers which should be good for most typical client installations. However you may customize this for your network location. A good source of NTP pool information is the NTP Pool Project.

See also

Debian-specific information

Upstream specific information

Other information


CategoryNetwork CategorySoftware CategorySystemAdministration ?CatgeoryTime