|Written in||Various (notably C and assembly language)|
|Source model||Free software|
|Marketing target||Personal computers, mobile devices, embedded devices, servers, mainframes, supercomputers|
|Platforms||IA-32 (with Hurd kernel only) and Alpha, ARC, ARM, AVR32, Blackfin, C6x, ETRAX CRIS, FR-V, H8/300, Hexagon, Itanium, M32R, m68k, META, MicroBlaze, MIPS, MN103, OpenRISC, PA-RISC, PowerPC, s390, S+core, SuperH, SPARC, TILE64, Unicore32, x86, Xtensa (with Linux-libre kernel only)|
|Kernel type||Microkernel (GNU Hurd) or Monolithic kernel (GNU Linux-libre, fork of Linux)|
|License||GNU GPL, GNU LGPL, GNU AGPL, GNU FDL, GNU FSDG|
GNU (// (listen)) is a project to create an operating system, consisting of an extensive collection of wholly free software. The use of the completed GNU tools led to the family of operating systems popularly known as Linux. Since GNU's own kernel never left the early stages of development, the GNU operating system is still considered not ready for production use. Most of GNU is licensed under the GNU Project's own General Public License (GPL).
GNU is also the project within which the free software concept originated. Richard Stallman, the founder of the project, views GNU as a "technical means to a social end". Relatedly, Lawrence Lessig states in his introduction to the second edition of Stallman's book Free Software, Free Society that in it Stallman has written about "the social aspects of software and how Free Software can create community and social justice".
Development of the GNU operating system was initiated by Richard Stallman while he worked at MIT Artificial Intelligence Laboratory. It was called the GNU Project, and was publicly announced on September 27, 1983, on the net.unix-wizards and net.usoft newsgroups by Stallman. Software development began on January 5, 1984, when Stallman quit his job at the Lab so that they could not claim ownership or interfere with distributing GNU components as free software. Richard Stallman chose the name by using various plays on words, including the song The Gnu.(00:45:30)
The goal was to bring a completely free software operating system into existence. Stallman wanted computer users to be free to study the source code of the software they use, share software with other people, modify the behavior of software, and publish their modified versions of the software. This philosophy was later published as the GNU Manifesto in March 1985.
Richard Stallman's experience with the Incompatible Timesharing System (ITS), an early operating system written in assembly language that became obsolete due to discontinuation of PDP-10, the computer architecture for which ITS was written, led to a decision that a portable system was necessary.(00:40:52) It was thus decided that the development would be started using C and Lisp as system programming languages, and that GNU would be compatible with Unix. At the time, Unix was already a popular proprietary operating system. The design of Unix was modular, so it could be reimplemented piece by piece.
Much of the needed software had to be written from scratch, but existing compatible third-party free software components were also used such as the TeX typesetting system, the X Window System, and the Mach microkernel that forms the basis of the GNU Mach core of GNU Hurd (the official kernel of GNU). With the exception of the aforementioned third-party components, most of GNU has been written by volunteers; some in their spare time, some paid by companies, educational institutions, and other non-profit organizations. In October 1985, Stallman set up the Free Software Foundation (FSF). In the late 1980s and 1990s, the FSF hired software developers to write the software needed for GNU.
As GNU gained prominence, interested businesses began contributing to development or selling GNU software and technical support. The most prominent and successful of these was Cygnus Solutions, now part of Red Hat.
The system's basic components include the GNU Compiler Collection (GCC), the GNU C library (glibc), and GNU Core Utilities (coreutils), but also the GNU Debugger (GDB), GNU Binary Utilities (binutils), the GNU Bash shell. GNU developers have contributed to Linux ports of GNU applications and utilities, which are now also widely used on other operating systems such as BSD variants, Solaris and macOS.[better source needed]
Many GNU programs have been ported to other operating systems, including proprietary platforms such as Microsoft Windows and macOS. GNU programs have been shown to be more reliable than their proprietary Unix counterparts.
As of November 2015, there are a total of 466 GNU packages (including decommissioned, 383 excluding) hosted on the official GNU development site.
GNU as an operating system
GNU is an operating system. In its original meaning, and one still common in hardware engineering, the operating system is a basic set of functions to control the hardware and manage things like task scheduling and system calls. In modern terminology used by software developers, the collection of these functions is usually referred to as a kernel. The GNU project does develop and include such kernels and, therefore, GNU is a proper operating system.
With kernels maintained by GNU and FSF
With the April 30, 2015 release of the Debian GNU/Hurd 2015 distro, GNU now provides all required components to assemble an operating system that users can install and use on a computer.
With non-GNU kernels
Because of the development status of Hurd, GNU is usually paired with other kernels such as Linux or FreeBSD. Whether the combination of GNU libraries with external kernels is a GNU operating system with a kernel (e.g. GNU with Linux), because the GNU collection renders the kernel into a usable operating system as understood in modern software development, or whether the kernel is an operating system unto itself with a GNU layer on top (i.e. Linux with GNU), because the kernel can operate a machine without GNU, is a matter of ongoing debate. The FSF maintains that an operating system built using the Linux kernel and GNU tools and utilities should be considered a variant of GNU, and promotes the term GNU/Linux for such systems (leading to the GNU/Linux naming controversy). The GNU Project has endorsed Linux distributions, such as gNewSense, Trisquel and Parabola GNU/Linux-libre.
Copyright, GNU licenses, and stewardship
The GNU Project recommends that contributors assign the copyright for GNU packages to the Free Software Foundation, though the Free Software Foundation considers it acceptable to release small changes to an existing project to the public domain. However, this is not required; package maintainers may retain copyright to the GNU packages they maintain, though since only the copyright holder may enforce the license used (such as the GNU GPL), the copyright holder in this case enforces it rather than the Free Software Foundation.
For the development of needed software, Stallman wrote a license called the GNU General Public License (first called Emacs General Public License), with the goal to guarantee users freedom to share and change free software. Stallman wrote this license after his experience with James Gosling and a program called UniPress, over a controversy around software code use in the GNU Emacs program. For most of the 80s, each GNU package had its own license: the Emacs General Public License, the GCC General Public License, etc. In 1989, FSF published a single license they could use for all their software, and which could be used by non-GNU projects: the GNU General Public License (GPL).
This license is now used by most of GNU software, as well as a large number of free software programs that are not part of the GNU Project; it also historically has been the most commonly used free software license (though recently challenged by the MIT license). It gives all recipients of a program the right to run, copy, modify and distribute it, while forbidding them from imposing further restrictions on any copies they distribute. This idea is often referred to as copyleft.
In 1991, the GNU Lesser General Public License (LGPL), then known as the Library General Public License, was written for the GNU C Library to allow it to be linked with proprietary software. 1991 also saw the release of version 2 of the GNU GPL. The GNU Free Documentation License (FDL), for documentation, followed in 2000. The GPL and LGPL were revised to version 3 in 2007, adding clauses to protect users against hardware restrictions that prevent users from running modified software on their own devices.
Besides GNU's packages, the GNU Project's licenses are used by many unrelated projects, such as the Linux kernel, often used with GNU software. A minority of the software used by most of Linux distributions, such as the X Window System, is licensed under permissive free software licenses.
The logo for GNU is a gnu head. Originally drawn by Etienne Suvasa, a bolder and simpler version designed by Aurelio Heckert is now preferred. It appears in GNU software and in printed and electronic documentation for the GNU Project, and is also used in Free Software Foundation materials.
- Access to Knowledge movement
- Free-culture movement
- Free software movement
- History of free and open-source software
- List of computing mascots
- Category:Computing mascots
- "GNU Licenses".
- "GNU FSDG".
- "What is GNU?". The GNU Operating System. Free Software Foundation. September 4, 2009. Retrieved October 9, 2009.
The name ‘GNU’ is a recursive acronym for ‘GNU's Not Unix‘; it is pronounced g-noo, as one syllable with no vowel sound between the g and the n.
- Stallman, Richard (March 9, 2006). The Free Software Movement and the Future of Freedom. Zagreb, Croatia: FSF Europe. Retrieved February 20, 2007. Lay summary.
- St. Amant, Kirk; Still, Brian (2007). Handbook of Research on Open Source Software: Technological, Economic, and Social Perspectives. ISBN 978-1-59140999-1.
- "GNU Manifesto". GNU project. FSF. Retrieved July 27, 2011.
- Raymond, Eric (February 1, 2001). The Cathedral & the Bazaar: Musings on Linux and Open Source by an Accidental Revolutionary. "O'Reilly Media, Inc.". pp. 10–12. ISBN 978-0-59600108-7.
- "1.2. What is GNU/Linux?". www.debian.org. Retrieved August 24, 2020.
- Stallman, Richard (1986), "KTH", Philosophy (speech), GNU, Stockholm, Sweden: FSF.
- Stallman, Richard M.; Gay, Joshua (December 2009). Free Software, Free Society: Selected Essays Of Richard M. Stallman. www.openisbn.com. ISBN 9781441436856. Retrieved March 24, 2016.
- "GNU's Not Unix". The free dictionary. Retrieved September 22, 2012.
- "The GNU Operating system". GNU project. FSF. Retrieved August 18, 2008.
- Marshall, Rosalie (November 17, 2008). "Q&A: Richard Stallman, founder of the GNU Project and the Free Software Foundation". AU: PC & Tech Authority. Retrieved September 22, 2012.
- Stallman, Richard (September 27, 1983). "new UNIX implementation". Newsgroup: net.unix-wizards. Usenet: 771@mit-eddie.UUCP. Retrieved August 18, 2008.
- Holmevik, Jan Rune; Bogost, Ian; Ulmer, Gregory (March 2012). Inter/vention: Free Play in the Age of Electracy. MIT Press. pp. 69–71. ISBN 978-0-262-01705-3.
- Stallman, Richard (March 1985). "Dr. Dobb's Journal". 10 (3): 30. Retrieved October 18, 2011. Cite journal requires
- DiBona, Chris; Stone, Mark; Cooper, Danese (October 2005). Open Sources 2.0: The Continuing Evolution. "O'Reilly Media, Inc.". pp. 38–40. ISBN 9780596008024.
- "Timeline of GNU/Linux and Unix".
Both C and Lisp will be available as system programming languages.
- Seebach, Peter (November 2008). Beginning Portable Shell Scripting: From Novice to Professional (Expert's Voice in Open Source). pp. 177–178. ISBN 9781430210436.
- Kerrisk, Michael (October 2010). The Linux Programming Interface: A Linux and UNIX System Programming Handbook. pp. 5–6. ISBN 9781593272203.
- Open Sources: Voices from the Open Source Revolution. O'Reilly & Associates, Inc. January 1999. ISBN 978-1-56592-582-3.
- Buxmann, Peter; Diefenbach, Heiner; Hess, Thomas (September 30, 2012). The Software Industry. pp. 187–196. ISBN 9783642315091.
- Practical UNIX and Internet Security, 3rd Edition. O'Reilly & Associates, Inc. February 2003. p. 18. ISBN 9781449310127.
- Stephen Shankland (November 15, 1999). "Red Hat buys software firm, shuffles CEO". CNET. CBS Interactive. Retrieved March 5, 2016.
- "GCC & GNU Toolchains – AMD". Developer.amd.com. Archived from the original on March 16, 2015. Retrieved September 2, 2015.
- Matthew, Neil; Stones, Richard (April 22, 2011). "The GNU Project and the Free Software Foundation". Beginning Linux Programming. ISBN 9781118058619.
- Sowe, Sulayman K; Stamelos, Ioannis G; Samoladas, Ioannis M (May 2007). Emerging Free and Open Source Software Practices. pp. 262–264. ISBN 9781599042107.
- "Linux: History and Introduction". Buzzle.com. August 25, 1991. Archived from the original on December 11, 2017. Retrieved September 22, 2012.
- McCune, Mike (December 2000). Integrating Linux and Windows. p. 30. ISBN 9780130306708.
- Sobell, Mark G; Seebach, Peter (2005). A Practical Guide To Unix For Mac Os X Users. p. 4. ISBN 9780131863330.
- Fuzz Revisited: A Re-examination of the Reliability of UNIX Utilities and Services – October 1995 – Computer Sciences Department,University of Wisconsin
- "An Inquiry into the Stability and Reliability of UNIX Utilities" (PDF).
- "Software – GNU Project – Free Software Foundation". Free Software Foundation, Inc. January 13, 2016. Retrieved January 13, 2016.
- Snom Technology. "Source Code & GPL Open Source". www.snom.com. Retrieved April 8, 2018.
Variants of the GNU operating system, which use the kernel Linux, are now widely used; though these systems are often referred to as "Linux", they are more accurately called "GNU/Linux systems".
- "GNU Operating System – CCM FAQ". CCM. Retrieved April 8, 2018.
GNU is an operating system that offers a set of free open source programs.
- Vaughan-Nichols, Steven J. "Opinion: The top 10 operating system stinkers", Computerworld, April 9, 2009: "... after more than 25 years in development, GNU remains incomplete: its kernel, Hurd, has never really made it out of the starting blocks. ... Almost no one has actually been able to use the OS; it's really more a set of ideas than an operating system."
- Hillesley, Richard (June 30, 2010), "GNU HURD: Altered visions and lost promise", The H (online ed.), p. 3,
Nearly twenty years later the HURD has still to reach maturity, and has never achieved production quality. ... Some of us are still wishing and hoping for the real deal, a GNU operating system with a GNU kernel.
- Lessig, Lawrence (2001). The Future of Ideas: The Fate of the Commons in a Connected World. Random House. p. 54. ISBN 978-0-375-50578-2.
He had mixed all of the ingredients needed for an operating system to function, but he was missing the core.
- "Debian GNU/Hurd 2015 Released – Phoronix". www.phoronix.com. Retrieved March 24, 2016.
- "Debian GNU/Hurd 2015 released!". lists.debian.org. Retrieved March 24, 2016.
- "status". www.gnu.org. Retrieved March 24, 2016.
- "Debian – Debian GNU/Hurd". www.debian.org. Retrieved March 24, 2016.
- "Debian – Debian GNU/Hurd – Configuration". www.debian.org. Retrieved March 24, 2016.
- Status, Free Software Foundation, May 3, 2015, retrieved April 24, 2017
- "GNU Linux-libre". December 17, 2012. Retrieved February 9, 2013.
- "1.2 What is Linux?", Debian open book, O'Reilly, October 5, 1991, retrieved September 22, 2012
- "What is GNU/Linux?", Ubuntu Installation Guide, Ubuntu (12.4 ed.), Canonical, retrieved June 22, 2015
- Kavanagh, Paul (July 26, 2004). Open Source Software: Implementation and Management. p. 129. ISBN 978-1-55558320-0.
- Welsh, Matt (September 8, 1994). "Linux is a GNU system and the DWARF support". Newsgroup: comp.os.linux.misc. Retrieved February 3, 2008.
RMS's idea (which I have heard first-hand) is that Linux systems should be considered GNU systems with Linux as the kernel.
- Proffitt, Brian (July 12, 2012). "Debian GNU/Linux seeks alignment with Free Software Foundation". ITworld. Retrieved September 22, 2012.
- "1.1. Linux or GNU/Linux, that is the question". SAG. TLDP. Retrieved September 22, 2012.
- "List of Free GNU/Linux Distributions", GNU Project, Free Software Foundation (FSF).
- "Copyright Papers". Information For Maintainers of GNU Software. FSF. June 30, 2011. Retrieved July 27, 2011.
- "Why the FSF gets copyright assignments from contributors". GNU. FSF. July 15, 2011. Retrieved July 27, 2011.
- "How to choose a license for your own work". GNU. Free Software Foundation. Retrieved July 12, 2012.
- Raymond, Eric S (November 9, 2002). "Licensing HOWTO". CatB. Retrieved September 22, 2012.
- "GPL 1.0", Old licenses, GNU, FSF.
- Kelty, Christopher M (June 2008). "Writing Copyright Licenses". Two Bits: The Cultural Significance of Free Software. ISBN 978-0-82234264-9.
- The History of the GNU General Public License, Free Software.
- "GNU's flashes", GNU's Bulletin, GNU Project, Free Software Foundation (FSF), 1 (5), June 11, 1998.
- "Open Source License Data". Open Source Resource Center. Black Duck Software. Archived from the original on October 8, 2012. Retrieved September 24, 2012.
- "Top Open Source Licenses in 2020: Trends and predictions". WhiteSource Software. Archived from the original on February 19, 2020. Retrieved February 19, 2020.
- Chopra, Samir; Dexter, Scott (August 2007). Decoding Liberation: The Promise of Free and Open Source Software. pp. 46–52. ISBN 978-0-41597893-4.
- The origins of Linux and the LGPL, Free BSD.
- Goldman, Ron; Gabriel, Richard P (April 2005). Innovation Happens Elsewhere: Open Source as Business Strategy. pp. 133–34. ISBN 978-1-55860889-4.
- Smith, Roderick W (2012). "Free Software and the GPL". Linux Essentials. ISBN 978-1-11819739-4.
- "A GNU Head". Free Software Foundation (FSF). July 13, 2011. Retrieved July 27, 2011.
- "A Bold GNU Head". Free Software Foundation. July 13, 2011. Retrieved July 27, 2011.
- "GNU 30th Anniversary". Free Software Foundation. October 8, 2013. Retrieved December 15, 2014.
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