LinuxBSDos.com posted a tutorial about installing Ubuntu 13.10 using a USB key from Window or another Linux distribution

A USB key or thumb drive or USB stick is the best device to use in installing your favorite Linux distribution. It’s not just because it’s reusable forever (unless you mess it up), but the system runs much faster than if you used a CD or DVD disc for installation.

This short tutorial shows how to load Ubuntu 13.10 on a USB key from Windows 7 or 8 or any Linux distribution, and use it to install the distribution on any computer. Before you start, the first thing to do is download an installation ISO image of Ubuntu 13.10 from here. The next thing is to insert the USB key you wish to use in a free USB port on the computer.

Now, we can start.

  Install Ubuntu 13.10 using a USB key from Window or another Linux distribution