Tom’s Hardware has a review of an interesting product, the Ubuntu H2. It’s a 3 GB USB microdrive that comes with a bootable DVD to install Ubuntu onto it, for the purpose of booting Ubuntu off the USB device.
Once Linux is ready to go, you need to make the computer boot from the H2 Micro USB Drive. Usually computers will either boot from a CD/DVD, a floppy disc or the system hard drive. However, as we want to use the Ubuntu H2 as a portable operating system, we need to get the system to boot from USB.