This is the debian-installer build system, which produces the Debian installation media. The debian-installer build system is Copyright 2001-2009 by Joey Hess and the d-i team, and is licensed under the terms of the GNU GPL 2 or any later version, which can be found in /usr/share/common-licenses/GPL-2 on Debian systems. The install media built by the debian-installer build system contain a wide variety of free software, including the GNU C library, busybox, linux kernel, newt, etc. It also includes much of the rest of the debian-installer: main-menu, udpkg, anna, cdebconf, rootskel and di-utils. The sources to all of the software included in the install media, and the details about its copyright can be found in the Debian archive. The open use Debian logo is used in some boot screens. It is copyright (c) 1999 Software in the Public Interest. This logo or a modified version may be used by anyone to refer to the Debian project, but does not indicate endorsement by the project. http://www.debian.org/logos/ The joy theme images (list of files below) have been designed from the joy theme (© 2012 Adrien Aubourg, GPLv2) but use the klowner layout and a rebuilt-from-scratch "debian" word. build/boot/hurd/pics/joy-hurd.svg build/boot/kfreebsd/pics/joy-kbsd.svg build/boot/x86/pics/joy.svg The Lines theme images (list of files below) have been designed from the Lines theme (© 2014 Juliette Taka BELIN, GPLv2+) but use the klowner layout. build/boot/hurd/pics/lines-hurd.svg build/boot/kfreebsd/pics/lines-kbsd.svg build/boot/x86/pics/lines.svg The Soft Waves theme images (list of files below) are © 2016 Juliette Taka BELIN, GPLv2+. build/boot/hurd/pics/softwaves-hurd.svg build/boot/kfreebsd/pics/softwaves-kbsd.svg build/boot/x86/pics/softwaves.svg The futurePrototype theme images (list of files below) are © 2018 Alex Makastheme, published under GPLv2+. build/boot/x86/pics/futurePrototype.svg The homeworld theme images (list of files below) are © 2020-2021 Juliette Taka BELIN, GPLv2+. build/boot/artwork/11-homeworld/homeworld.svg build/boot/artwork/11-homeworld/homeworld.png The gen-hd-image tool, used to build bootable partitioned disk images, is Copyright 2014,2015 Karsten Merker and is dual-licensed. It is provided under the terms of the GNU GPL version 2 or any later version, or alternatively under the terms of the X11 license.