Date: Thu, 12 Oct 2006 14:51:21 +0100 From: Alex Zbyslaw <xfb52@dial.pipex.com> To: Zbigniew Szalbot <zbyszek@szalbot.homedns.org> Cc: freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: ntpd with flags in rc.conf Message-ID: <452E4859.6000705@dial.pipex.com> In-Reply-To: <20061011235218.I13509@192.168.11.51> References: <20061011192435.N4855@192.168.11.51> <452D326A.2030304@dial.pipex.com> <20061011201811.O7568@192.168.11.51> <452D4D77.6010704@dial.pipex.com> <20061011235218.I13509@192.168.11.51>
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Zbigniew Szalbot wrote:
> I have a question about ntpd. HOw is the time adjusted? Gradually over
> time? Because I can see 30-second difference between my pc and FBSD
> machine. Will it be minimized in the longer run? Thanks!
You're best off directing followup questions back to freebsd-questions
as you may well get answers quicker than if you just ask me!
ntpd adjusts time slowly, but the -g option should make it set the time
correctly when it starts from when it should keep in sync. Set --g in
your ntpd_flags and then as root run
sh /etc/rc.d/ntpd restart
With -g it can still take a while (several minutes) before ntpd trusts
its servers enough to set the time, Many people, I believe, use ntpdate
to set the time once at startup and then use ntpd to keep it in sync.
(Ignore the comment on the manual page for ntpdate about it being
deprecated. It has said that for a long time and shows no sign of going
away). I believe ntpdate will pick up servers from your ntpd.conf.
The man page for ntpd has more info on how ntpd keeps the time, and also
check out ntpdc which can show you what ntpd is doing (which servers
it's using and stuff).
When you say the time on your PC is 30 seconds different, do you mean a
Windows pc? Maybe it's the one that's wrong, or maybe your local ntpd
isn't finding any servers.
As root: ntpdc -c dmpeers
should get you a list of the servers ntpd is polling and a * shows the
one it is currently trusting, if i recall.
--Alex
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