To make changes to the network on a Linux box, open terminal session.
Then type in SETUP<enter> and it opens up the Text Mode Setup Utility
Then arrow down to Network Config>Edit DNS Config and you will be able to change the Host Name of the PC
You can also arrow down to Network Config>Edit Devices and choose the eth0 (usually the network card) and manually change the IP Address, Subnet Mask & Gateway of the card
Once done follow screen and save and exit
Next you will need to type: service network restart at root prompt