Network settings
Network settings may differ with other Linux distributions. In this example we'll be using Ubuntu 8.10. Most distributions have a similar graphical network manager available.
Automatic settings are on by default in Ubuntu or can be separately chosen at installing phase of operation system. You can check that the DHCP is set to automatic from the networking settings. Right-click the networking icon (Right-up corner on your desktop) -> select edit connections. From the wired leaflet, choose your connection and press edit. A new window will pop-up. -> IPv4 settings. Check that method: is set to Automatic DHCP.

