Re: [SLE] ntp update frequency

On 31/10/06 02:32, John Andersen wrote:
On Monday 30 October 2006 23:29, Darryl Gregorash wrote:

Umm, John... if /var/log/ntp exists on his system, then the daemon
probably *is* already running :-)


Maybe, but does it not also log there when run via cron
and at boot up?


I doubt if too many run the ntp daemon in a cron, unless it's run with
the -q option; once it starts, it requires at least a kill -TERM to stop
it. With the -q option, the daemon sets the time once, then exits (in
which case, it makes far more sense to use ntpdate -- I doubt if that
will ever be retired, no matter what the ntp documentation says). When
the daemon is started from the boot script /etc/init.d/xntp, the initial
output goes to syslog, as follows:

Oct 19 15:23:06 static24-89-67-198 ntpdate[6770]: step time server
142.3.100.15 offset -0.491011 sec
Oct 19 15:23:06 static24-89-67-198 ntpd[6775]: ntpd 4.2.0a@xxxxxxxx Sat
Mar 19 19:20:10 UTC 2005 (1)
Oct 19 15:23:06 static24-89-67-198 ntpd[6775]: precision = 3.000 usec
Oct 19 15:23:06 static24-89-67-198 ntpd[6775]: Listening on interface
wildcard, 0.0.0.0#123
Oct 19 15:23:06 static24-89-67-198 ntpd[6775]: Listening on interface
wildcard, ::#123
Oct 19 15:23:06 static24-89-67-198 ntpd[6775]: Listening on interface
lo, 127.0.0.1#123
Oct 19 15:23:06 static24-89-67-198 ntpd[6775]: Listening on interface
eth0, 192.168.1.1#123
Oct 19 15:23:06 static24-89-67-198 ntpd[6775]: Listening on interface
eth1, 24.89.67.198#123
Oct 19 15:23:06 static24-89-67-198 ntpd[6775]: kernel time sync status 0040
Oct 19 15:23:07 static24-89-67-198 ntpd[6775]: frequency initialized
81.206 PPM from /var/lib/ntp/drift/ntp.drift

The very first line logged to /var/log/ntp is an "event_restart", as
follows:

19 Oct 15:23:07 ntpd[6775]: system event 'event_restart' (0x01) status
'sync_alarm, sync_unspec, 1 event, event_unspec' (0xc010)

after which everything goes to /var/log/ntp (well, this assumes use of
the "logfile" directive; otherwise, the syslog facility is used).

Still, the way Hylton phrased his query strongly suggests a running
daemon: "... I see that the ntp daemon only checks at certain intervals..."


--
Check the headers for your unsubscription address
For additional commands send e-mail to suse-linux-e-help@xxxxxxxx
Also check the archives at http://lists.suse.com
Please read the FAQs: suse-linux-e-faq@xxxxxxxx

Relevant Pages

  • RE: run perl as service
    ... Agreed but the problem with a daemon is you need to keep checking its ... write an overcomplicated daemon which monitors its state but if cron ... Any opinion expressed in this e-mail is personal to the sender ... monitoring for operational reasons or for lawful business practices. ...
    (perl.beginners)
  • Re: daily cron jobs: setting time of day, how?
    ... Which cron daemon are you running? ... Vixie cron - this runs jobs at the scheduled hour. ... Vixie and fcron are for computers that are running 24 hours a day, ...
    (alt.os.linux.suse)
  • Re: [SLE] SuSE Services(daemons)
    ... Starts the udev daemon. ... Binds the raw devices you have configured to be bound on boot ... Even if you're not using a local mail server ... After an automatic installation, this runs any scripts configured to run on ...
    (SuSE)
  • Re: RSYNC & SSH
    ... Install rsync as a daemon on B. Set up /etc/xinetd.d/rsync on B to enable ... Set teh cron file on A to run rsync when needed ... Since it is run on cron it will mail the output of this command (files ...
    (comp.os.linux.security)
  • Re: Newbie IMAP
    ... > why I recommend using cron for the task. ... I used cron for a while, too, but the daemon mode should work without ... The command line is the front line. ...
    (alt.os.linux.suse)