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Re: (Not so) Stupid question



On Tue, 19 Sep 2000, guy keren wrote:

> 
> On Tue, 19 Sep 2000, Omer Musaev wrote:
> 
> > System time jumps one hour backwords once a day (a night).
> > There is no rdate, ntpdate, or similar on cron.
> > There is no apmd running.
> > There is no ntpd or xntpd running.
> > There is no timezone, since system time is stored in RTC.
> 
> i would suggest the following to try and track the problem:
> 
> 1. enable process accounting.
> 2. write a cron job that will write the time into a file, once a minute.
             ~~~~
Been there done that...
Took me a long time to realize that cron can't be used to diagnose clock
troubles. IMHO cron is a victim of the problem, not a means of diagnosis.
Better to use a process that waits on a read from a machine whose clock
you trust.

 - yba

> 
> then wait a day. check the exact time in which the machine's time drifted
> by an hour, and then look for suspicious activity in the proces accounting
> data.
> 
> btw, i assume that the machine is not rebooted every day. right?
> 
> guy
> 
> "For world domination - press 1,
>  or dial 0, and please hold, for the creator." -- nob o. dy
> 
> 
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