Debian -- Getting Debian
debian.org/distribDownload an installation image. Depending on your Internet connection, you may download either of the following: A small installation image: can be downloaded quickly and should be recorded onto a removable disk. To use this, you will need a machine with an Internet connection. 64-bit PC netinst iso; 32-bit PC netinst iso
Downloading Debian CD/DVD images via HTTP/FTP
https://www.debian.org/CD/http-ftpTo install Debian on a machine without an Internet connection, it's possible to use CD images (700 MB each) or DVD images (4.7 GB each). Download the first CD or DVD image file, write it using a CD/DVD recorder (or a USB stick on i386 and amd64 ports), and then reboot from that. The first CD/DVD disk contains all the files necessary to install ...