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Groups > comp.os.linux.misc > #12487

Re: time problem

From JohnF <john@please.see.sig.for.email.com>
Newsgroups comp.os.linux.misc
Subject Re: time problem
Date 2014-10-26 07:11 +0000
Organization PANIX Public Access Internet and UNIX, NYC
Message-ID <m2i6qd$nta$1@reader1.panix.com> (permalink)
References (1 earlier) <m2hgmc$898$1@dont-email.me> <m2hh7n$vnb$1@speranza.aioe.org> <msuthbxd1a.ln2@goaway.wombat.san-francisco.ca.us> <m2hpu0$qqt$1@reader1.panix.com> <m2i18n$ems$1@dont-email.me>

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Rich <rich@example.invalid> wrote:
> JohnF <john@please.see.sig.for.email.com> wrote:
>> Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> wrote:
>> > Bill Cunningham <nospam@nspam.invalid> wrote:
>> >> "philo " <philo@privacy.net> wrote in message 
>> >>>
>> >>>  Set to local time if it's on UTC (which I think is the default)
>> >>
>> >> I try hwclock with the -w and -s switch. They don't seem to do
>> >> anything. The old Linux's used an ntp server to get the time.
>> > 
>> > The new linux distributions use ntp to get the time. The hardware
>> > clock and NTP are two different issues (I think this was posted
>> > recently).
>> > 
>> > As many many people have suggested in this thread, either tell your
>> > Windows box to use UTC (preferred if possible) or tell your linux
>> > to use localtime. keith
> 
>> I've been having pretty much the same problem with slackware 14.1,
>> and am not running windows in any way, shape, or form on this box.
>> Every couple of days, some app seems to reset the hwclock to UTC. But
>> date show blah-blah EDT 2014, and there's no...
>>  diff /etc/localtime /usr/share/zoneinfo/US/Eastern
>> ...differences. I set the date, clock -w it, and it

> Which "it"?  Output from 'date' or the HWclock contents?
Thanks for followup and info, Rich. "It" is from 'date'.
Now that, thanks to your remarks, I'm researching
it (the problem) better, I realize that 'date' isn't
sufficient info.

>> remains edt for a few days, then suddenly I notice it's utc.
> Which "it"?  Output from 'date' or the HWclock contents?
As above, 'date'.

>> What could be causing that?
> Do you reboot between the time you set the HWclock,
> and the instant you find UTC showing up somewhere?
Well, yes, but "find" is the operative word there.
I'm not sure when it "actually happens" (during boot or
otherwise) because I don't often notice the date.
Mostly when I'm doing something like ls -alt|less
to double-check what I've been working on, and
notice it's screwy.

> If so, what is the contents of your /etc/hardwareclock file?
That's  localtime  (and some #comments).

> Since you say you are not running windows, then quit trying to store
> the hardware clock as localtime, have it set to UTC, and everything
> will be fine.  You'll still see localtime everywhere anyway.
Okay, thanks.

> If /etc/hardwareclock already say UTC, leave it alone.  If not, change
> "localtime" to UTC in the file, and quit trying to have the HWclock be
> local.
Okay, done.
Note: I ran timeconfig to make the change (as suggested by
those #comments), and it says about localtime that
"this is how most PCs are set up". But I nevertheless
changed /etc/hardwareclock to UTC as you suggested.

> Then, set the system time if/when you need to adjust things (use the
> date command, it also "sets/changes" the time).  And then save the
> result into the hardware clock with:
>     hwclock --utc --systohc
Okay, done, but 'date' and 'hwclock -r' both still say the same
numerical time, and both say EDT. I'm guessing I have to kill -HUP
something, but I couldn't guess which pid from ps ax. I'll have to
try a reboot (but that's tough to do in the middle of a reply:).

> Or, setup an ntp client to keep your clocks synced with the ntp system
> on the internet, and just let the Slackware 14.1 rc.d scripts save the
> system time to the hardware clock when you do shutdown.
Didn't want to do that, but looked at those scripts for some
clue about the process mentioned above. But all I could find was
your preceding instructions  hwclock --utc --systohc  in rc.0 .

> Just always give the 'hwclock' command the --utc flag and it will
> translate the time from the hwclock into your local time for you when
> you want to view/reset the hwclock.
Okay, as above, doesn't seem to be doing exactly that now,
but I'll try a reboot and see if some process or other
initializes itself with the new /etc/hardwareclock contents.
Thanks for the help,
-- 
John Forkosh  ( mailto:  j@f.com  where j=john and f=forkosh )

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Thread

time problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-10-25 18:24 -0400
  Re: time problem Grant <omg@grrr.id.au> - 2014-10-26 11:02 +1100
    Re: time problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-10-25 20:30 -0400
  Re: time problem Baho Utot <baho-utot@columbus.rr.com> - 2014-10-25 20:06 -0400
  Re: time problem philo  <philo@privacy.net> - 2014-10-25 19:53 -0500
    Re: time problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-10-25 21:02 -0400
      Re: time problem Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-10-25 18:20 -0700
        Re: time problem JohnF <john@please.see.sig.for.email.com> - 2014-10-26 03:31 +0000
          Re: time problem Rich <rich@example.invalid> - 2014-10-26 05:36 +0000
            Re: time problem JohnF <john@please.see.sig.for.email.com> - 2014-10-26 07:11 +0000
              Re: time problem Rich <rich@example.invalid> - 2014-10-26 15:43 +0000
                Re: time problem JohnF <john@please.see.sig.for.email.com> - 2014-10-27 04:35 +0000
                Re: time problem Rich <rich@example.invalid> - 2014-10-27 10:22 +0000
                Re: time problem JohnF <john@please.see.sig.for.email.com> - 2014-10-27 12:03 +0000
                Re: time problem Rich <rich@example.invalid> - 2014-10-27 12:21 +0000
                Re: time problem William Unruh <unruh@invalid.ca> - 2014-10-27 13:54 +0000
                Re: time problem JohnF <john@please.see.sig.for.email.com> - 2014-10-27 05:01 +0000
                Re: time problem Rich <rich@example.invalid> - 2014-10-27 10:23 +0000
                Re: time problem JohnF <john@please.see.sig.for.email.com> - 2014-10-27 12:11 +0000
                Re: time problem Rich <rich@example.invalid> - 2014-10-27 12:30 +0000
                Re: time problem William Unruh <unruh@invalid.ca> - 2014-10-27 13:58 +0000
                Re: time problem Rich <rich@example.invalid> - 2014-10-27 18:04 +0000
              Re: time problem William Unruh <unruh@invalid.ca> - 2014-10-26 16:13 +0000
                Re: time problem Chick Tower <c.tower@deadspam.com> - 2014-10-31 03:30 +0000
          Re: time problem William Unruh <unruh@invalid.ca> - 2014-10-26 16:02 +0000
            Re: time problem Andreas Kohlbach <oct14.5.ankman@spamgourmet.com> - 2014-10-26 17:48 -0400
              Re: time problem William Unruh <unruh@invalid.ca> - 2014-10-26 21:58 +0000
              Re: time problem "Nuno J. Silva (aka njsg)" <njsg@invalid.invalid> - 2014-10-27 08:47 +0000
                Re: time problem Andreas Kohlbach <oct14.5.ankman@spamgourmet.com> - 2014-10-27 17:20 -0400
            Re: time problem JohnF <john@please.see.sig.for.email.com> - 2014-10-27 04:45 +0000
    Re: time problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-10-25 21:08 -0400
      Re: time problem philo  <philo@privacy.net> - 2014-10-26 07:15 -0500
  Re: time problem Balwinder S Dheeman <bdheeman.SANSPAM@outlook.com> - 2014-10-26 14:08 +0530
    Re: time problem Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2014-10-27 03:15 +0000
  Re: time problem William Unruh <unruh@invalid.ca> - 2014-10-26 15:53 +0000
  Re: time problem James Moe <jimoeDESPAM@sohnen-moe.com> - 2014-10-26 14:01 -0700
    Re: time problem Michael Baeuerle <michael.baeuerle@stz-e.de> - 2014-10-27 07:59 +0000
      Re: time problem Marc Haber <mh+usenetspam1118@zugschl.us> - 2014-10-27 13:31 +0100
        "iburst" option of ntpd (was: time problem) Michael Baeuerle <michael.baeuerle@stz-e.de> - 2014-10-28 08:23 +0000
          Re: "iburst" option of ntpd (was: time problem) Marc Haber <mh+usenetspam1118@zugschl.us> - 2014-10-28 10:14 +0100
            Re: "iburst" option of ntpd (was: time problem) William Unruh <unruh@invalid.ca> - 2014-10-28 21:10 +0000
          Re: "iburst" option of ntpd Chris Davies <chris-usenet@roaima.co.uk> - 2014-10-28 14:24 +0000

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