Terminal not showing machine's name. Why?

Hi,
Terminal not showing machine's name. Why?
Before I used to have "Martin Parris’s iMac:" on the prompt. Now, I always have this "unknown..." line. Anybody know why and how to fix it?
Cheers
MPAC

The default PS1 prompt variable ha \h in it which the bash shell substitutes the hostname, however, bash determines the hostname by first taking you IP nn.nn.nn.nn address and doing a reverse DNS lookup. If bash gets a value back, no matter what it is, even unknown, bash uses that value. If the Mac OS X lookup does not get a response from the DNS servers, Mac OS X will use your System Preferences -> Sharing -> Computer name.
In your cast, it appears a DNS server is returning unknown
You can set your PS1 prompt to whatever you want. See "man bash" and look for 'prompt'
You could also search the forums for 'PS1' and find similar discussings on the Terminal and your prompt.

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