UNetbootin allows you to create bootable Live USB drives for Ubuntu,
Fedora, and other Linux distributions without burning a CD. It runs on
Windows, Linux, and Mac OS X. You can either let UNetbootin download one
of the many distributions supported out-of-the-box for you, or supply
your own Linux .iso file if you've already downloaded one or your
preferred distribution isn't on the list.
UNetbootin can create a bootable Live USB drive, or it can make a
"frugal install" on your local hard disk if you don't have a USB drive.
It loads distributions either by downloading a ISO (CD image) files for
you, or by using an ISO file you've already downloaded.