Differences between revisions 25 and 26
Revision 25 as of 2019-12-29 03:34:15
Size: 2748
Editor: leela52452
Comment: add debian and upstream info
Revision 26 as of 2019-12-30 00:00:55
Size: 2751
Editor: PaulWise
Comment: expand jargon
Deletions are marked like this. Additions are marked like this.
Line 58: Line 58:
 [[DebianMan:ntpd|Manpages]]  [[DebianMan:ntpd|Manual page]]

Translation(s): English - Español - Italiano - Português Brasileiro


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. You time should be synced in a next minute.

  • Done.


  • 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.

Debian-specific information

upstream specific information

other information

CategoryNetwork CategorySoftware CategorySystemAdministration ?CatgeoryTime