LinuxSA Mailing list archives

  From: Alex Garner <alex@netcraft.com.au>
  To  : <akenning@topology.org>
  Date: Thu, 24 May 2001 13:44:14 +0930 (CST)

Re: Time synchronisation.

> > > What do other people use to synchronise the system clock?
> > > 
> > > I use rdate, but I find when the machine is rebooted it does not
> > > keep the synchronised time.
> > 
> > rdate -s rdate.host
> > hwclock --systohc
> > 
> 
> That's what I used to use approximately on my old RH machines.
> But on SuSE machines, rdate is just not there.
> So I use this in my root cron file:
> 
> 29 2,8,14,20 * * * /usr/sbin/ntpdate -s -t 2 ntp.adelaide.edu.au >/dev/null 2>&1
> 30 2,8,14,20 * * * /sbin/hwclock --utc --systohc
> 
> It's a good idea to use --utc, of course, and also to specify the
> -u in the appropriate config file so that the boot software
> knows what the clock is set to.

If you are running RedHat, just use 'setclock' instead of hwclock.

This will read in your time zone and UTC settings from
/etc/sysconfig/clock and supply the arguments to hwclock
automatically. This file is used by the startup scripts to set the
system clock at boot.

/usr/bin/rdate -s
/usr/sbin/setclock

...is a bit neater. Not sure what other distributions have like this,
but this is the 'redhat approved' method.

Cheers

Alex!

-- 

Alex Garner <alex@netcraft.com.au>

NetCraft Australia
Phone (08) 8338 0888
http://www.netcraft.com.au

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