Shell script to change host name

[ites]

I need a shell script which will change the hostname , I need the script to prompt for a name if the name is localhost.localdomain.I am a newcomer in scripting. So please help

Thanks in advance

[RobinVossen]

Is this homework?
Well I am not going to give you the script since helping with homework is not allowed on the forums.
but I can advice you.
There is a file were you can find the hostname.
The System reads it for the hostname.
If you write a script to extract that line out of the file. To show the current hostname and then change it.
Its really easy. Id do this with Perl if Id were you.
You'll need to read the file line by line. Till its the right string you are looking for

Hope I helped you without betraying something