Terminal doesn't show computer name - just unknown0025004ad79e:~

It doesn't matter.. that is just the hostname associated with your DHCP IP address. It has no bearing on your computer unless people need to connect remotely to it.

i have this 'problem" too.
Not only in Terminal app but on all places the computer name shows.

All is working fine with the "unknown-00-morenumbers" name, but i would love to see just the simple name "iMac of Dirk"

f.e. trying out the EyeConnect app and connecting to my HDTV also shows the unknown-xxxxxx name.

Cant i just get the Simple name?

Go to system preferences | sharing

set your computer name there, click on edit and make sure 'use dynamic global hostname' is unchecked.

See if that helps?

Thanks for helping out,

but 'use dynamic global hostname' is already unchecked.

I was having some troubles too and couldn't figure out why my computer name seemed like it was changing. Check out this help page: http://reviews.cnet.com/8301-13727_7-10362633-263.html

You'll need to go into terminal to use that tip, though, but it'll show you how to force the host name to stay the same. So far so good on my side....