Hi,

Is there a simple way to synchronize my system clock, say, on startup? My
laptop unfortunately has a broken battery, and everytime I disconnect the
power cable, the clock freezes... only to resume activity at the next
boot... which always makes me travel back in time )

Cheers,

Niki
--
Whereof one cannot speak, thereof one frequently goes ranting on and on
at ball-breaking length. -- Ludwig Wittgenstein, Tractatus logico-
philosophicus, first draft.

On Fri, 15 Dec 2006 11:59:10 +0100, Niki Kovacs wrote:

> Hi,
>
> Is there a simple way to synchronize my system clock, say, on startup? My
> laptop unfortunately has a broken battery, and everytime I disconnect the
> power cable, the clock freezes... only to resume activity at the next
> boot... which always makes me travel back in time )
>
> Cheers,
>
> Niki

put this is /etc/rc.d/rc.local :

/usr/sbin/ntpdate de.pool.ntp.org
/sbin/hwclock -w

you can change ntp server, here is the list:
http://ntp.isc.org/bin/view/Servers/WebHome

--
i.

Thelonious Monk lived in an eleven-dimensional house.
On Saturday 16 Dec 2006 15:28 Ivan Rajkovic, wrote:

> On Fri, 15 Dec 2006 11:59:10 +0100, Niki Kovacs wrote:
>
>> Hi,
>>
>> Is there a simple way to synchronize my system clock, say, on
>> startup?
>
> put this is /etc/rc.d/rc.local :
>
> /usr/sbin/ntpdate de.pool.ntp.org
> /sbin/hwclock -w

Does this set the clock? I thought it needed "-s" to set.
e.g. /usr/sbin/ntpdate -s de.pool.ntp.org

--
del 8-)

Le Sat, 16 Dec 2006 16:28:39 +0100, Ivan Rajkovic a écrit*:

> put this is /etc/rc.d/rc.local :
>
> /usr/sbin/ntpdate de.pool.ntp.org
> /sbin/hwclock -w

Thanks very much! Worked like a charm!

Niki
--
Whereof one cannot speak, thereof one frequently goes ranting on and on
at ball-breaking length. -- Ludwig Wittgenstein, Tractatus logico-
philosophicus, first draft.

On Fri, 15 Dec 2006 11:59:10 +0100, Niki Kovacs wrote:

> Hi,
>
> Is there a simple way to synchronize my system clock, say, on startup? My
> laptop unfortunately has a broken battery, and everytime I disconnect the
> power cable, the clock freezes... only to resume activity at the next
> boot... which always makes me travel back in time )
>
> Cheers,
>
> Niki
>
Some dhcpd servers send the ntp clock information. The script below does
some simple parsing to get the name of the server. Make the script
executable and add a section in rc.local to start rc.ntpd if it is
executable.

#!/bin/bash
#
# file: /etc/rc.d/rc.ntpd
# http://www.gnu.org/licenses/gpl.txt
# Douglas D. Mayne (c) 2006
#
NTPDATE=$(which ntpdate)
NTPD=$(which ntpd)
preferred_clock() {
cat /etc/ntp.conf | grep -v "^#" | grep -v 127\. \
| grep "^server " | head -1 | sed 's/^server //'
}
set_clock() {
CLOCK=$(preferred_clock)
echo Preferred Clock is $CLOCK
[ ! -x $NTPDATE ] && exit 1
ping -c 1 $CLOCK || exit 1
killall ntpd
sleep 4
echo "Setting the clock..."
$NTPDATE -b $CLOCK
sleep 2
}
case "$1" in
'start')
set_clock && $NTPD
;;
'stop')
killall ntpd
;;
'status')
ntpq -c peers
;;
*)
echo "usage $0 start|stop|status"
esac
# end rc.ntpd

--
Douglas Mayne

On 2006-12-16, Niki Kovacs <mickey@mouse.com> wrote:

>> /usr/sbin/ntpdate de.pool.ntp.org
>> /sbin/hwclock -w
>
> Thanks very much! Worked like a charm!

Now, put it in one of your crons and you'll never be more than a
couple nanoseconds off time.

nb

> Thelonious Monk lived in an eleven-dimensional house.
> On Saturday 16 Dec 2006 15:28 Ivan Rajkovic, wrote:
>
> > On Fri, 15 Dec 2006 11:59:10 +0100, Niki Kovacs wrote:
> >
> >> Hi,
> >>
> >> Is there a simple way to synchronize my system clock, say, on
> >> startup?
> >
> > put this is /etc/rc.d/rc.local :
> >
> > /usr/sbin/ntpdate de.pool.ntp.org
> > /sbin/hwclock -w
>
> Does this set the clock? I thought it needed "-s" to set.
> e.g. /usr/sbin/ntpdate -s de.pool.ntp.org
>

no it works fine without -s ... why there is no man/info pages ?

> On 2006-12-16, Niki Kovacs <mickey@mouse.com> wrote:
>
> >> /usr/sbin/ntpdate de.pool.ntp.org
> >> /sbin/hwclock -w
> >
> > Thanks very much! Worked like a charm!
>
> Now, put it in one of your crons and you'll never be more than a
> couple nanoseconds off time.
>
> nb

hoo my god /o\

you'll never put that in cron !!! What append if, a the same
millisecond, all the billion of pc go and connect to ntpd server ?

Read the online doc, I ve got ressource in french if you want. It is
better to run ntpd instead of using ntpudate in crontab job.

notbob <notbob@nothome.com> wrote in news:gdudneqZY-
1VghnYnZ2dnUVZ_qWdnZ2d@comcast.com:

> On 2006-12-16, Niki Kovacs <mickey@mouse.com> wrote:
> Now, put it in one of your crons and you'll never be more than a
> couple nanoseconds off time.

For clarity's sake, the "it" above is ntpdate.

I wrote an rc.ntpd with status|start|stop|restart with logging and a
logrotate configuration. I posted it for comment to the Slackware forum of
http://www.linuxquestions.org. There was some feedback with suggestions.
http://www.linuxquestions.org/questi...d.php?t=471465
should take you right to it (if you're interested, of course).

Ivan Rajkovic <ivan@iep.physik.uni-essen.de> wrote:
> On Fri, 15 Dec 2006 11:59:10 +0100, Niki Kovacs wrote:
>
>> Hi,
>>
>> Is there a simple way to synchronize my system clock, say, on startup? My
>> laptop unfortunately has a broken battery, and everytime I disconnect the
>> power cable, the clock freezes... only to resume activity at the next
>> boot... which always makes me travel back in time )
>>
>> Cheers,
>>
>> Niki
>
> put this is /etc/rc.d/rc.local :
>
> /usr/sbin/ntpdate de.pool.ntp.org
> /sbin/hwclock -w
>
> you can change ntp server, here is the list:
> http://ntp.isc.org/bin/view/Servers/WebHome

We still use rdate. We include the following in rc.local:

/usr/bin/rdate -s 129.6.15.29

Is there a reason to use ntpd over rdate?

cordially, as always,

rm