You can also store personal data on the second partition. We will make two partitions, one for the actual Ubuntu OS, and another to automatically save your changes and settings back to the flash drive and restore them on each boot.
Now that you're in Ubuntu, it is time to format the flash drive. *This process is no longer needed as of Ubuntu 8.10 because a USB Ubuntu Creator is built in. Just make sure to follow each step carefully. I'm not liable for any damage done to your computer and/or flash drive. It was to hard to document each little step for each step. You will have a whole, powerful operating system in your pocket! You can run Ubuntu will all your settings and files, even if you don't have your own computer with you. You will be able to automatically save your changes and settings back to the flash drive and restore them on each boot using a second partition. This Instructable will show you how to install, boot, and run the popular Linux distro, Ubuntu from your flash drive. You can recover your data from a hard drive and copy it to an external hard drive if that computer won't boot up or scan that computer for viruses and so on. Running an operating system, like Windows, off of your flash drive can be very useful sometimes.