Groups > linux.debian.user > #198489

Re: What time is it, really?

From	Gene Heskett <gheskett@shentel.net>
Newsgroups	linux.debian.user
Subject	Re: What time is it, really?
Date	2018-08-09 16:50 +0200
Message-ID	<wkUqe-4FO-9@gated-at.bofh.it> (permalink)
References	<wkUgx-4Cg-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thursday 09 August 2018 10:19:46 Fred wrote:

> Hi,
>
> Someone complained off list about the timestamp in my emails being
> off. Being a hardware person I think hardware should work properly and
> clocks should keep accurate time.  So I installed ntpdate as suggested
> but it is not active yet.

And it only sets the clock once, at boot time.
>
Todays version of ntp(ntpd) handles that right well, my hardware clock is 
on grenwich and software on local, and both stay within 50 milliseconds 
of real time.

> If I ask google what time it is in Mesa AZ. the response agrees
> closely with an "atomic" clock I have.  The computer clock is about 10
> min. fast.
>
> fred@ragnok:~$ /usr/sbin/ntpdate -q time.nist.gov
> server 2610:20:6f96:96::4, stratum 1, offset -610.512368, delay
> 0.09421 server 132.163.96.4, stratum 1, offset -610.509394, delay
> 0.08899 9 Aug 06:51:15 ntpdate[13672]: step time server 132.163.96.4
> offset -610.509394 sec
>
> fred@ragnok:~$ date
> Thu Aug  9 06:51:18 MST 2018
>
> The time server is quite close to the computer clock.  What causes the
> discrepancy?  The offset in the time server response is about 10 min.
> The offset is measured from what to what and how is it measured?
>
As stated. ntp handles that by making small corrections so as to not 
disturb other time sensitive stuff on your computer. Thats another way 
of saying your 10 minute error may take it 4 hours to correct. The hdwe 
clock is set as part of the shutdown, so if you don't run 24/7, you 
don't start from square one the next time you powerup. And its so little 
cpu load you may not even find it with some of the monitoring 
facilities. Here, sorted on cpu usage, its about the 20th down the htop 
list.


> Best regards,
> Fred



-- 
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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What time is it, really? Fred <fred@blakemfg.com> - 2018-08-09 16:40 +0200
  Re: What time is it, really? Martin <keine-eile@online.de> - 2018-08-09 16:40 +0200
  Re: What time is it, really? Greg Wooledge <wooledg@eeg.ccf.org> - 2018-08-09 16:40 +0200
    Re: What time is it, really? Jim Popovitch <jim@k4vqc.com> - 2018-08-09 17:00 +0200
      Re: What time is it, really? Greg Wooledge <wooledg@eeg.ccf.org> - 2018-08-09 17:10 +0200
        Re: What time is it, really? Jim Popovitch <jim@k4vqc.com> - 2018-08-09 17:10 +0200
        Re: What time is it, really? john doe <johndoe65534@mail.com> - 2018-08-09 20:40 +0200
          Re: What time is it, really? Brian <ad44@cityscape.co.uk> - 2018-08-09 21:50 +0200
            Re: What time is it, really? Fred <fred@blakemfg.com> - 2018-08-09 23:40 +0200
              Re: What time is it, really? Shea Alterio <krusete@gmail.com> - 2018-08-10 00:00 +0200
              Re: What time is it, really? David Wright <deblis@lionunicorn.co.uk> - 2018-08-10 17:20 +0200
                Re: What time is it, really? Michael Stone <mstone@debian.org> - 2018-08-10 17:40 +0200
                Re: What time is it, really? David Wright <deblis@lionunicorn.co.uk> - 2018-08-10 21:50 +0200
                Re: What time is it, really? Fred <fred@blakemfg.com> - 2018-08-10 18:40 +0200
                Re: What time is it, really? Brian <ad44@cityscape.co.uk> - 2018-08-10 19:50 +0200
                Re: What time is it, really? Fekete Tamás <fektom@gmail.com> - 2018-08-10 19:50 +0200
                Re: What time is it, really? Greg Wooledge <wooledg@eeg.ccf.org> - 2018-08-10 20:10 +0200
                Re: What time is it, really? Gene Heskett <gheskett@shentel.net> - 2018-08-10 20:20 +0200
                Re: What time is it, really? Michael Stone <mstone@debian.org> - 2018-08-10 23:00 +0200
                Re: What time is it, really? Fekete Tamás <fektom@gmail.com> - 2018-08-11 11:10 +0200
                Re: What time is it, really? David Wright <deblis@lionunicorn.co.uk> - 2018-08-10 22:40 +0200
    Re: What time is it, really? Gene Heskett <gheskett@shentel.net> - 2018-08-09 17:10 +0200
    Re: What time is it, really? Darac Marjal <mailinglist@darac.org.uk> - 2018-08-09 17:20 +0200
      Re: What time is it, really? Greg Wooledge <wooledg@eeg.ccf.org> - 2018-08-09 18:00 +0200
        Re: What time is it, really? Andre Majorel <aym-naibed@teaser.fr> - 2018-08-09 19:10 +0200
        Re: What time is it, really? Nicolas George <george@nsup.org> - 2018-08-09 19:20 +0200
        Re: What time is it, really? Michael Stone <mstone@debian.org> - 2018-08-09 20:00 +0200
    Re: What time is it, really? deloptes <deloptes@gmail.com> - 2018-08-10 01:30 +0200
  Re: What time is it, really? Nicolas George <george@nsup.org> - 2018-08-09 16:50 +0200
    OT: What time is it, really? Martin <keine-eile@online.de> - 2018-08-09 17:10 +0200
      Re: OT: What time is it, really? Martin <keine-eile@online.de> - 2018-08-09 17:20 +0200
        Re: OT: What time is it, really? Nicolas George <george@nsup.org> - 2018-08-09 17:50 +0200
          Re: OT: What time is it, really? Martin <keine-eile@online.de> - 2018-08-09 18:10 +0200
        Re: OT: What time is it, really? Gene Heskett <gheskett@shentel.net> - 2018-08-09 18:20 +0200
          Re: OT: What time is it, really? Martin <keine-eile@online.de> - 2018-08-09 18:30 +0200
            Re: OT: What time is it, really? Gene Heskett <gheskett@shentel.net> - 2018-08-09 19:40 +0200
              Re: OT: What time is it, really? Anders Andersson <pipatron@gmail.com> - 2018-08-10 12:00 +0200
                Re: OT: What time is it, really? Gene Heskett <gheskett@shentel.net> - 2018-08-10 13:50 +0200
      Re: OT: What time is it, really? Nicolas George <george@nsup.org> - 2018-08-09 17:20 +0200
    Re: What time is it, really? Fred <fred@blakemfg.com> - 2018-08-09 18:50 +0200
      Re: What time is it, really? Nicolas George <george@nsup.org> - 2018-08-09 19:00 +0200
      Re: What time is it, really? Greg Wooledge <wooledg@eeg.ccf.org> - 2018-08-09 19:00 +0200
      Re: What time is it, really? Michael Stone <mstone@debian.org> - 2018-08-09 20:00 +0200
  Re: What time is it, really? Gene Heskett <gheskett@shentel.net> - 2018-08-09 16:50 +0200

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