untu intsallation cd are provided free of cost by Canonical. Ubuntu is an OS based on the popular open source distribution called Debian and is promoted by the South African multimillionaire Mark Shuttleworth. Click here to get your copy of free ubuntu installation cd. You will have your FREE Ubuntu installation CD at home within weeks.
enjoy 🙂  

You can also avail the GNU/Linux distribution of choice at a nominal rate. Click here for further information. The list of choices include the entire repositories of Ubuntu 7.10,Ubuntu 8.04 and Ubuntu 8.10 and almost all major GNU/Linux distributions.