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create parent section otherwise links to info are subsection of totally unrelated one
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||<tablestyle="width: 100%;" style="border: 0px hidden">~-[:DebianWiki/EditorGuide#translation:Translation(s)]: [:fr/NTP:Français]-~||<style="text-align: right;border: 0px hidden"> (!) [:/Discussion:Discussion]|| | ~-[[DebianWiki/EditorGuide#translation|Translation(s)]]: English - [[es/NTP|Español]] - [[it/NTP|Italiano]] - [[pt_BR/NTP|Português Brasileiro]]-~ |
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Describe in one or two lines what your page is about. | = NTP = Network Time Protocol. This will make your system date match actual date, by synchronizing with network time servers. |
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## If your page gets really long, uncomment this Table of Contents [[TableOfContents(2)]] |
{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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#language en ||<tablestyle="width: 100%;" style="border: 0px hidden">~-[:DebianWiki/EditorGuide#translation:Translation(s)]: none-~||<style="text-align: right;border: 0px hidden"> (!) [:/Discussion:Discussion]|| ---- Network Time Protocol, This will keep you system date with exact match to actual date. |
## If your page gets really long, uncomment this Table of Contents ## [[TableOfContents(2)]] == 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. |
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## If your page gets really long, uncomment this Table of Contents [[TableOfContents(2)]] |
* Type '''ntpq -p''' to see servers you are syncing with. * Type '''date''' again to see if the time changed. You 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 |
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*Type date to see current date and time {{{ date }}} *Install NTP {{{ apt-get install ntpdate }}} *Done. *Type '''date''' again to see if the time changed. *[Optional]If you would like to add a server that is closer to you and you know its address. You could type: {{{ /etc/init.d/ntp-server stop ntpdate clock.fmt.he.net ntpdate ntp1.tummy.com /etc/init.d/ntp-server start |
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 |
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=== Using The Cron === | == Public Internet Time Servers == |
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To configure the system to synchronize the clock with an Internet Time Server, every morning add the following entry to the /etc/crontab configuration file: | 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. |
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#m h dom mon dow user command 57 5 * * * root /usr/sbin/ntpdate ntp.blueyonder.co.uk |
* https://www.pool.ntp.org/ |
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=== Public Internet Time Servers === | == See also == |
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uk.pool.ntp.org (This points to a random United Kingdom based time server) | === 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 Brasileiro
NTP
Network Time Protocol. This will make your system date match actual date, by synchronizing with network time servers.
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. You 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