Most of the Linux distributions come with ISO images. It's a bootable disc. You can burn it into a CD or DVD and it then you can boot it to install or using it as Linux live CD. But after a while you will have many old CD in your drawer since the new version keep coming. To save all your CD you can use USB Flash drive instead using UneetBootin.UneetBootin is an open source program developed by Geza Kovacs that allows you to create bootable Live USB drives for Ubuntu, Fedora, and other Linux … Read more...