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Functions

Synchronize date and time with a server over ssh

Terminal - Synchronize date and time with a server over ssh
date --set="$(ssh user@server date)"
2011-08-30 20:03:06
User: splante
Functions: date
32
Synchronize date and time with a server over ssh

Shorter, easier to remember version of cmd#7636

NTP is better, but there are situations where it can't be used. In those cases, you can do this to sync the local time to a server.

Alternatives

There are 4 alternatives - vote for the best!

Terminal - Alternatives
date --set="$(ssh user@server 'date -u')"
2013-06-03 06:43:49
Functions: date
Tags: ssh ,NTP ,Date
2

using -u is better for standardizing date output and timezones, for servers in different timezones.

date +%Y%m%d%T -s "`ssh user@server 'date "+%Y%m%d %T"'`"
2011-01-11 10:33:32
Functions: date
Tags: ssh ,NTP ,Date
0

If you are stuck behind a firewall and want to synchronize time with another server but you do not want to port forward NTP (which uses UDP) then this command is handy. It gets the time from a server and sets the local time. It is not that accurate but I can live with a second or so drift.

date `ssh user@server date "+%y%m%d%H%M.%S"`
2011-08-30 22:32:14
User: wu
Functions: date
Tags: ssh ,NTP ,Date
0

Neat idea! This variation works on FreeBSD.

Know a better way?

If you can do better, submit your command here.

What others think

Is there a nice way to do that the other way round? So set the date on a machine to you SSH to, not from a machine you SSH to.

Comment by bugmenot 137 weeks and 1 day ago

Sure. From the time source server do:

ssh user@host "date --set \"$(date)\""

Comment by TommyBotten 136 weeks and 4 days ago

@TommyBotten

Than You Tommy. This was useful

Comment by knoppix5 21 weeks and 1 day ago

Your point of view

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