I think what you have to do is:
Go on a terminal and do an su
then you will the file /etc/hosts
In this file you should have:
127.0.0.1 localhost
192.168.0.1 NAME
where NAME=the name you wanna give to the machine
then do a
/etc/rc.d/init.d/network restart (I am not sure if you have to reboot or this command will change it for you? I am newbie as well
)
but u can check your host name using the command:
hostname
Simple
Good luck