I installed Ubuntu 11.04 (Natty Narwhal) on a ThinkPad X220, model 42902GW. I have since upgraded to Ubuntu 11.10 (Oneiric Ocelot) and have updated some of the information below accordingly. Netboot As a source of network installation files I made use of another GNU/Linux computer on my home LAN which is connected to the Internet through a familiar ADSL-modem/gateway/router/caching nameserver/DHCP