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I've 2 endpoints (here PCs) with Linux OS versions connected to a publicly NTP Time Master (for e.g. server 0.in.pool.ntp.org). Time on those 2 Linux PCs are properly syncing with that ntp pool server. Even time is same on 2 Linux PCs. Perfect, everything is fine.

I've an unique requirement in testing to check whether -

  • "Network device shall sync their clocks to an NTP Server as per their configured NTP client settings."

Now I want to know - what actual time is on NTP Server (here it's server 0.in.pool.ntp.org).

To know the time on Linux machine, I can run - timedatectl command after logging into Linux PC.

Since, server 0.in.pool.ntp.org is obviously a Public NTP pool server, of course anyone can't login simply.

How to know the time on publicly available NTP Pool Servers without logging in to that ?

Is there any command exist to fetch just the time/date from NTP Server, without logging into that?

It would help me a lot to provide objective evidence (as proof) between - time on those 2 Linux PCs and time on server 0.in.pool.ntp.org are SAME and I can PASS the test for NTP feature.

yivi
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devsoftcode
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  • This makes no sense. Why do you care what is the time on the ntp server is running on? – KamilCuk Mar 04 '21 at 16:58
  • Do you just want to see the time? It is here, for example: https://www.usno.navy.mil/USNO/time/display-clocks/simpletime – Andrew Aug 11 '21 at 22:26

1 Answers1

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How to know current time on publicly available ntp pool servers without logging into it?

Use NTP.

what actual time is on NTP Server

The one reported via NTP running on that server.

How to know the time on publicly available NTP Pool Servers without logging in to that ?

It's literally NTP is the protocol to exchange time information from one server to another. Use that protocol to get the time on remote server.

Is there any command exist to fetch just the time/date from NTP Server, without logging into that?

Yes - literally any command that uses NTP protocol is just for that. There's also clockdiff command with ICMP timestamps. Pointless to use clockdiff, when you have ntp..

time on those 2 Linux PCs and time on server 0.in.pool.ntp.org are SAME

I would say it's physically impossible for time to be "same" in two locations.

In your timedatectl output you have a System clock synchronized: line. Also timedatectl show-timesync will give you some more information about systemd-timesyncd operation. And timedatectl timesync-status has many more available data, like offset, delay, clock root distance, precision.

KamilCuk
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