Ubuntu is distributed on four types of images described below.
The desktop CD allows you to try Ubuntu without changing your computer at all, and at your option to install it permanently later. This type of CD is what most people will want to use. You will need at least 256MB of RAM to install from this CD.
There are three images available, each for a different type of computer:
The server install CD allows you to install Ubuntu permanently on a computer for use as a server. It will not install a graphical user interface.
There are six images available, each for a different type of computer:
The alternate install CD allows you to perform certain specialist installations of Ubuntu. It provides for the following situations:
In the event that you encounter a bug using the alternate installer, please file a bug on the debian-installer package.
There are five images available, each for a different type of computer:
There are three images available, each for a different type of computer:
A full list of available files, including BitTorrent files, can be found below.
If you need help burning these images to disk, see the CD Burning Guide.