Linux: http://www.ubuntu.com/download/help/create-a-usb-stick-on-ubuntu
Mac OSX: http://www.ubuntu.com/download/help/create-a-usb-stick-on-mac-osx Windows: http://www.ubuntu.com/download/help/create-a-usb-stick-on-windows
Linux: http://www.ubuntu.com/download/help/create-a-usb-stick-on-ubuntu
Mac OSX: http://www.ubuntu.com/download/help/create-a-usb-stick-on-mac-osx Windows: http://www.ubuntu.com/download/help/create-a-usb-stick-on-windows