[ntp:questions] Re: Difference between Ntpdate and NTPDaemon

Richard B. Gilbert rgilbert88 at comcast.net
Mon May 15 17:46:38 UTC 2006

Leandro Pfleger de Aguiar wrote:

> Hi everyone
>     I was looking for detailed information about differences between ntpdate and ntpd and have found this:
> "Finally, since ntpdate does not discipline the host clock frequency as does ntpd, the accuracy using ntpdate is limited."
> Since both, ntpdate and ntpd used adjtime() kernel function to adjust system clock, what this phrase means? What is it intend to say ?
> Tanks
> Leandro P.
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ntpd "steers" the local clock much the way you would steer an automobile 
to stay in your lane on a highway.  At each poll interval, it compares 
the local clock to the servers clocks and makes corrections to the local 
clock frequency.

Ntpdate, OTOH, gets the time from a server, sets the local clock and exits.

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