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At work I can only connect to a specific ntp time-server. Under Ubuntu 10.10 I was able to add that server somewhere under time/date settings. Now under Ubuntu 11.04 I cannot find that option anymore.

I am sure that there is a config somewhere that I can edit to add the approved server.

Can you please give me some pointers?

Edit: I should probably mention that I use the classic desktop.

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up vote 8 down vote accepted

You'll have to do some manual editing using nano, or your editor of choice:

sudo nano /etc/default/ntpdate

and change the NTPSERVERS="ntp.[your-server-here]"

If you restart your computer this change will be made active. If you're feeling impatient and don't want to wait for the server to automatically update you can do it manually:

sudo ntpdate-debian

I can't see a GUI option for this, but I could be wrong.

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I rebooted afterwards, but do you know how long it would take, until the clock is set according to the time server? – bjoernz May 27 '11 at 10:18
you can force it do update manually: using sudo ntpdate-debian; i've just updated my answer to reflect this. – thomas michael wallace May 27 '11 at 10:28
Great, thanks, I will probably search for this after I install 11.10. Hopefully this will still work. – bjoernz May 27 '11 at 10:41

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