UNIX for Dummies Questions & Answers

I have a VirtualBox w2008r2 Domain Controller running on a Solaris 10 server. I have the time on the Virtual machine set to Default time sync (bios clock) and the Solaris server set to sync to

Code:

0 8,20 * * * /usr/sbin/ntpdate tick.usno.navy.mil tock.usno.navy.mil >> /tmp/ntp.log

My problem is after a few hours the time one my DC will start to drift and after a few days it is a minute or 2 slow. How do I keep this from happening

Is there a reason that this is set as a cron job twice a day? If it's just convenient and you could increase the frequency, then you might consider using the deamon ntpd or xntpd

You can code up /etc/ntp.conf and start the deamon at system boot. It should then keep in step all the time, drifting the clock a few milliseconds either side of your time source.

See the man page for ntpd or xntpd and ntp.conf on how to set this up for your installation.


If it is the Windows clock that is going out, then that is another issue. I'm not sure how you set that to have a reference clock.



I hope that this helps
Robin
liverpool/Blackburn
UK

Yes the problem is with the Windows Virtual DC running on the Solaris box. I have installed Guest Additions for VirtualBox. Hopefully that will fix the problem.