|USB Flash Drive|
If you already have Ubuntu Linux (v.11.04) installed then simply boot up your computer and from the main menu (of the Classic Desktop) select System -> Administration -> Startup Disk Creator. If you don't have Linux installed, then insert the Ubuntu Linux DVD, restart your computer and run Ubuntu from the DVD (don't install Linux, just "try Linux"). Once Linux has booted then select Startup Disk Creator by clicking on the Ubuntu icon in the
top left (of the Unity Desktop) and typing in "Startup" in the search box to find the application.
Plug in the USB flash drive that you want to install Linux onto. It should be shown in the Startup Disk Creator dialog box. Click the Erase Disk button to erase the disk. Then, with your Linux install DVD inserted and mounted (this is already done if you booted from the Linux install DVD), click the Make Startup Disk button. In a few minutes, you will have a USB Flash Drive that you can use to boot into a Linux installation. You can even save files back to the USB Flash Drive that you work on in Linux.