Thanks to everyone for replying...this was the exact problem...dual boot with
windows. I have updates the hardware clock and things are perfect now.
I don't have an "ntpdate" command though. Is it simply a matter of downloading
this prog and running it? Or does it need any other config?
Thanks,
Mark.
>===== Original Message From Paul Millar <[EMAIL PROTECTED]> =====
>Hi Mark,
>
>On Wed, 18 Apr 2001, Mark Hannah wrote:
>> Can anyone help me with a problem that has been driving me crazy for the
last
>> few weeks?
>>
>> Since we switched to BST, my linux time has somehow got an hour ahead.
>> I can chage the time by doing :-
>>
>> date --set='-1 hour'
>>
>> but, on the next re-boot the time reverts back to being an hour fast.
>> Can anyone tell me what is going on?
>
>Is this a dual boot with a windows machine, by an chance ?
>
>Ok, There are two distinct clocks on a PC a `hardware' clock (works when
>the power is off, but tends to drift badly) and a `system' clock
>(maintained by Linux in software, generally a lot better but not perfect).
>
>On power-up (in /etc/rc.d/rc.sysinit for the curious), Linux reads the
>time from the hardware clock. There are two conventions for the hardware
>clock: storing UTC or local time. If you store UTC in your hardware clock,
>then you don't have to alter the clock when entering BST, if you store
>local time then you do.
>
>To alter the hardware clock, use the hwclock command, e.g.:
> hwclock (look at current time in hardware clock)
> hwclock --systohc (copies system clock to hardware clock, assuming
> hardware clock stores local time)
> hwclock --systohc --utc (as above but hardware clock stores UTC)
>
>Unfortunately, windows assumes that the hardware clock stores the local
>time and will adjust the clock accordingly when entering BST, hence the
>problem. You can either reset the clock to UTC and live with windows
>having the wrong idea of time, or update Linux to mirror windows'
>behaviour. If you have a RedHat machine, look at the /etc/sysconfig/clock
>file and change UTC=true to UTC=false.
>
>HTH
>
>Paul.
>
>PS. If you are going to use ntp (which is very good) make sure you've
>updated your copy. There's a vulnerability that can lead to a remote root
>compromise. Updates are available from RedHat (and I assume SuSE,
>mandrake, ...)
>
>-----------------------------------------------------------------------------
-
>Paul Millar yo-yo, n. :
>Particle Physics Theory Group Something that is occasionally
>Department of Physics and Astronomy up but normally down.
>University of Glasgow, (see also Computer)
>Glasgow G12 8QQ,
[EMAIL PROTECTED]
>Scotland +44 (0)141 330 4717
>-----------------------------------------------------------------------------
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