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Comment: mention systemd timesyncd that can replace the client side of NTP
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{i} systemd-timesyncd acts as a NTP client. This is enough to synchronize a system. NTP deamon is required only when a NTP '''server''' is required. See [[https://wiki.archlinux.org/index.php/Systemd-timesyncd| ArchLinux's page on timesyncd]] for more details

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NTP

Network Time Protocol. This will keep you system date with exact match to actual date.

{i} systemd-timesyncd acts as a NTP client. This is enough to synchronize a system. NTP deamon is required only when a NTP server is required. See ArchLinux'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.


CategoryNetwork