Debian GNU/Linux is distributed freely over the Internet. If you simply want to install Debian, these are your options:
Buy a set of CDs
The easiest way to install Debian is with a set of CDs bought from a vendor. There is a list of CD vendors at http://www.debian.org/CD/vendors/
Download files over the Internet and make a CD set yourself
The biggest advantage of downloading the .iso files and burning them yourself is not having to wait for CDs to arrive. The full CD set can be downloaded in .iso format from [http://www.debian.org/CD/http-ftp/ one of the Debian mirrors], or better yet, using the [http://www.debian.org/CD/jigdo-cd/ jigdo] tool to do a distributed download of the images.
Note, although there are over 20 CDs (or 3 DVDs) in a full set, only the first CD is required to install Debian. The additional CDs are optional and include extra packages. See also ["DebianCDContents"] to find out what is on each CD.
If you do want to download one or more of the full 650 MB iso images, please use the ["jigdo"] tool which spreads out the load among various Debian servers, lightening their load as well as giving you a faster download.
Download the Network Install CD
For folks with broadband internet access, it's quite rare to download a full set of 650 MB iso images to install Debian. Instead, it's most common to just use a minimal network install CD instead. This network install iso (called "netinst") contains just enough packages to install a very basic Debian system. During the install procedure, it downloads the rest from the Internet as needed. A netinst iso image is around 180 MB. Also available is the so-called "businesscard" image that is around 40 MB. [http:DebianNetworkInstall read more: ]
There is also the possibility to boot from another computer without needing to use CD/floppy media at all. All you need is a TFTPD and a DHCPD running on the install-from computer. This is called installing via "netboot". See the installation manual for more info on netboot installation.
- ["iso image"]
DebianLive, a Live Debian that you can try in a CD-rom or install in your hard disk or usb stick.
[http://mirror.home-dn.net/d-i/ Backported Debian Installer Images Archive] This directory provides Debian GNU/Linux Stable installer ISO images with a modification by [http://kmuto.jp/ Kenshi Muto] to support newer hardware, mainly SATA and Ethernet devices.