correct way to set timezone & clock/date?
Eric Shubert
ejs at shubes.net
Tue Aug 25 12:33:04 MST 2009
Here's what I get on a test server of mine:
[root at dellefield ~]# ntpdate -v -d dewey.lib.ci.phoenix.az.us ntp.drydog.com
25 Aug 12:28:28 ntpdate[6149]: ntpdate 4.2.2p1 at 1.1570-o Tue May 19
13:58:06 UTC 2009 (1)
Looking for host dewey.lib.ci.phoenix.az.us and service ntp
host found : dewey.lib.ci.phoenix.az.us
Looking for host ntp.drydog.com and service ntp
host found : rrcs-66-27-60-10.west.biz.rr.com
transmit(148.167.132.200)
receive(148.167.132.200)
transmit(148.167.132.200)
receive(148.167.132.200)
transmit(148.167.132.200)
transmit(66.27.60.10)
receive(148.167.132.200)
transmit(148.167.132.200)
receive(148.167.132.200)
transmit(148.167.132.200)
receive(66.27.60.10)
transmit(66.27.60.10)
receive(66.27.60.10)
transmit(66.27.60.10)
receive(66.27.60.10)
transmit(66.27.60.10)
receive(66.27.60.10)
transmit(66.27.60.10)
server 148.167.132.200, port 123
stratum 2, precision -20, leap 00, trust 000
refid [148.167.132.200], delay 0.09081, dispersion 0.01126
transmitted 4, in filter 4
reference time: ce3eb3eb.9159d1f0 Tue, Aug 25 2009 12:03:07.567
originate timestamp: ce3eb9de.49e55521 Tue, Aug 25 2009 12:28:30.288
transmit timestamp: ce3eb9de.43a0f909 Tue, Aug 25 2009 12:28:30.264
filter delay: 0.11383 0.13196 0.11774 0.09081
0.00000 0.00000 0.00000 0.00000
filter offset: 0.002299 0.012727 0.005610 -0.00813
0.000000 0.000000 0.000000 0.000000
delay 0.09081, dispersion 0.01126
offset -0.008137
server 66.27.60.10, port 123
stratum 2, precision -21, leap 00, trust 000
refid [66.27.60.10], delay 0.28584, dispersion 0.00227
transmitted 4, in filter 4
reference time: ce3eb980.f314d607 Tue, Aug 25 2009 12:26:56.949
originate timestamp: ce3eb9df.19c5555c Tue, Aug 25 2009 12:28:31.100
transmit timestamp: ce3eb9de.f711a543 Tue, Aug 25 2009 12:28:30.965
filter delay: 0.29257 0.28622 0.28584 0.30823
0.00000 0.00000 0.00000 0.00000
filter offset: 0.002869 0.004561 0.005198 -0.00578
0.000000 0.000000 0.000000 0.000000
delay 0.28584, dispersion 0.00227
offset 0.005198
25 Aug 12:28:31 ntpdate[6149]: adjust time server 148.167.132.200 offset
-0.008137 sec
[root at dellefield ~]#
So the ntp servers are ok. Are you in a position to stop the firewall
momentarily for a test to be sure that's where your blockage is?
Steven A. DuChene wrote:
> I ran the following:
>
> ntpdate -v -d dewey.lib.ci.phoenix.az.us ntp.drydog.com
>
> and it looked for and found both hosts but then just sits there with
> no other output.
> --
> Steve
>
>
> -----Original Message-----
> From: Eric Cope
> Sent: Aug 25, 2009 3:10 PM
> To: Main PLUG discussion list
> Subject: Re: correct way to set timezone & clock/date?
>
> You can force an update, instead of waiting on the incremental
> changes. But, as noted below, it may affect services.
> Eric
>
> On Tue, Aug 25, 2009 at 11:42 AM, Jon M. Hanson
> <jon at the-hansons-az.net <mailto:jon at the-hansons-az.net>> wrote:
>
> ntp also adjusts your clock gradually so it won't immediately
> jump to
> the correct time. This is to prevent problems with services
> (like cron
> and logging) that depend on a clock that doesn't suddenly change.
>
> Sent from my iPhone
>
> On Aug 25, 2009, at 11:33 AM, Alex Dean <alex at crackpot.org
> <mailto:alex at crackpot.org>> wrote:
>
> > Try tailing /var/log/messages (you said this was fedora, right?)
> > when you start up the ntp daemon. It can take a while (>1 minute
> > sometimes) for the time servers to synchronize, but you
> should see
> > some log activity during that time to show you that it's working.
> >
> > alex
> >
> > On Aug 25, 2009, at 1:27 PM, Steven A. DuChene wrote:
> >
> >> Hmm, so I did the following:
> >>
> >> # iptables -A input_ext -p tcp -m tcp --dport 123 -j ACCEPT
> >>
> >> and then tried starting ntp services again but it still
> seems to hang
> >> when trying to get the initial date and time. So adding a
> rule to the
> >> firewall for tcp access on port 123 seems to have made no
> difference
> >> to my problem.
> >>
> >> nuts...
> >> --
> >> Steve
> >>
> >> -----Original Message-----
> >>> From: "kitepilot at kitepilot.com
> <mailto:kitepilot at kitepilot.com>" <kitepilot at kitepilot.com
> <mailto:kitepilot at kitepilot.com>>
> >>> Sent: Aug 25, 2009 2:13 PM
> >>> To: "Steven A. DuChene" <linux-clusters at mindspring.com
> <mailto:linux-clusters at mindspring.com>>, Main PLUG
> >>> discussion list <plug-discuss at lists.plug.phoenix.az.us
> <mailto:plug-discuss at lists.plug.phoenix.az.us>>
> >>> Subject: Re: correct way to set timezone & clock/date?
> >>>
> >>> From /etc/services
> >>>
> >>> ntp 123/tcp
> >>> ntp 123/udp # Network Time
> >>> Protocol
> >>>
> >>> I would use "ntp" instead of "udp", and if it doesn't work,
> take a
> >>> dump...
> >>> :)
> >>> ET
> >>>
> >>
> >> ---------------------------------------------------
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> >>
> >
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>
>
> --
> Eric Cope
> http://cope-et-al.com
>
>
--
-Eric 'shubes'
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