Chapter 3. Installation System

Table of Contents

3.1. What's new in the installation system?
3.1.1. Automated installation

The Debian Installer is the official installation system for Debian. It offers a variety of installation methods. Which methods are available to install your system depends on your architecture.

Images of the installer for bullseye can be found together with the Installation Guide on the Debian website.

The Installation Guide is also included on the first media of the official Debian DVD (CD/blu-ray) sets, at:


You may also want to check the errata for debian-installer for a list of known issues.

3.1. What's new in the installation system?

There has been a lot of development on the Debian Installer since its previous official release with Debian 10, resulting in improved hardware support and some exciting new features or improvements.

Most notably there is the initial support for UEFI Secure Boot (see ???), which has been added to the installation images.

If you are interested in an overview of the detailed changes since buster, please check the release announcements for the bullseye beta and RC releases available from the Debian Installer's news history.

3.1.1. Automated installation

Some changes mentioned in the previous section also imply changes in the support in the installer for automated installation using preconfiguration files. This means that if you have existing preconfiguration files that worked with the buster installer, you cannot expect these to work with the new installer without modification.

The Installation Guide has an updated separate appendix with extensive documentation on using preconfiguration.