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System installer for Debian

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The language select screen of the Debian Installer
Original author(s)	Debian Project
Developer(s)	Debian Install System Team
Initial release	June 6, 2005; 19 years ago (2005-06-06)

Stable release	12.7 (Bookworm) / June 10, 2023; 18 months ago (2023-06-10)

Written in	C
Operating system	Microcosm of Debian, made of udebs (loading from Windows is supported via win32-loader)
Available in	87 languages
Type	System installer
License	GPL
Website	www.debian.org/devel/debian-installer/

Debian-Installer is a system installer for Debian and its derivatives. It originally appeared in Skolelinux (Debian-Edu) 1.0, released in June 2004, but is now used as the official installation system since Debian 3.1 (Sarge), which was released on June 6, 2005.

Features

Debian-Installer consists of two modes: a text mode and a graphical mode. Multiple components of the installer exists to configure various aspects of the installed system, and configuration of some components may require user input.

Regardless of which mode is selected, the installer first prompts the user for a language selection. Some of the tasks the installer performs after a language selection is as follows:

Detects hardware
Detect installation media
Configure the network
Configure APT/select mirrors
Set up user accounts
Detect other operating systems

Win32-loader

win32-loader (officially Debian-Installer Loader) is a component of the Debian Linux distribution that runs on Windows and has the ability to load the actual Debian installer either from the network (as in the version in an official website) or from CD-ROM media (as in the version included in Jessie CD images).