Monday, June 20, 2011

FREE SOFTWARE COMMUNITY

Free software movement

The free software movement is a social movement[1] with the goal of obtaining and guaranteeing certain freedoms for software users, namely the freedom to run the software, to study and change the software, and to redistribute copies with or without changes. Although drawing on traditions and philosophies among members of the 1970s hacker culture, Richard Stallman formally founded the movement in 1983 by launching the GNU Project.[2]
Stallman founded the Free Software Foundation in 1985 to support the movement.

Philosophy[edit]

The philosophy of the movement is that the use of computers should not lead to people being prevented from cooperating with each other. In practice, this means rejecting "proprietary software", which imposes such restrictions, and promoting free software,[3] with the ultimate goal of liberating everyone "in cyberspace"[4] – that is, every computer user. Stallman notes that this action will promote rather than hinder the progression of technology, since "it means that much wasteful duplication of system programming effort will be avoided. This effort can go instead into advancing the state of the art".[5]
Members of the free software movement believe that all users of software should have the freedoms listed in The Free Software Definition. Many of them hold that it is immoral to prohibit or prevent people from exercising these freedoms and that these freedoms are required to create a decent society where software users can help each other, and to have control over their computers.[6]
Some adherents to the free software movement do not believe that proprietary software is strictly immoral.[7]
"While social change may occur as an unintended by-product of technological change, advocates of new technologies often have promoted them as instruments of positive social change." This quote by San Jose State professor Joel West explains much of the philosophy, or the reason that the free source movement is alive. If it is assumed that social change is not only affected, but in some points of view, directed by the advancement of technology, is it ethical to hold these technologies from certain people? If not to make a direct change, this movement is in place to raise awareness about the effects that take place because of the physical things around us. A computer, for instance, allows us so many more freedoms than we have without a computer, but should these technological mediums be implied freedoms, or selective privileges? The debate over the morality of both sides to the free software movement is a difficult topic to compromise respective opposition.[8]
The Free Software Foundation also believes all software needs free documentation, in particular because conscientious programmers should be able to update manuals to reflect modification that they made to the software, but deems the freedom to modify less important for other types of written works.[9] Within the free software movement, the Floss manuals foundation specialises on the goal of providing such documentation. Members of the free software movement advocate that works which serve a practical purpose should also be free.[10]

Actions[edit]

Writing and spreading free software[edit]

The core work of the free software movement focused on software development. The free software movement also rejects proprietary software, refusing to install software that does not give them the freedoms of free software. According to Stallman, "The only thing in the software field that is worse than an unauthorised copy of a proprietary program, is an authorised copy of the proprietary program because this does the same harm to its whole community of users, and in addition, usually the developer, the perpetrator of this evil, profits from it."[11]

Building awareness[edit]

Some supporters of the free software movement take up public speaking, or host a stall at software-related conferences to raise awareness of software freedom. This is seen as important since people who receive free software, but who are not aware that it is free software, will later accept a non-free replacement or will add software that is not free software.[12]

Ethical Equality[edit]

Margaret S. Elliot, a researcher in the Institute for Software at the University of California Irvine, not only outlines many benefits that could come from a free software movement, she claims that it is inherently necessary to give every person equal opportunity to utilize the Internet, assuming that the computer is globally accessible. Since the world has become more based in the framework of technology and its advancement, creating a selective internet that allows only some to surf the web freely is nonsensical according to Elliot. If there is a desire to live in a more coexistent world that is benefited by communication and global assistance, then globally free software should be a position to strive for, according to many scholars who promote awareness about the free software movement. The ideas sparked by the GNU associates are an attempt to promote a "cooperative environment" that understands the benefits of having a local community and a global community.[13]

Legislation[edit]

A lot of lobbying work has been done against software patents and expansions of copyright law. Other lobbying focusses directly on use of free software by government agencies and government-funded projects.
The Venezuelan government implemented a free software law in January 2006. Decree No. 3,390 mandated all government agencies to migrate to free software over a two-year period.[14]
Congressmen Edgar David Villanueva and Jacques Rodrich Ackerman have been instrumental in introducing in Republic of Peru bill 1609 on "Free Software in Public Administration".[15] The incident immediately invited the attention of Microsoft Inc, Peru, whose General Manager wrote a letter to Dr Edgar David Villanueva. Dr Villanueva's response received worldwide attention and is still seen as a classical piece of argumentation favouring use of free software in Governments.[16]
In the USA, there have been efforts to pass legislation at the state level encouraging use of free software by state government agencies.[17]

Subgroups and schisms[edit]

Like many social movements, the free software movement has ongoing internal conflict between personalities and between supporters of compromise versus strict adherence to values.

Open source[edit]

In 1998, some companies[who?] met to create a marketing campaign for free software which would focus on technology rather than ethics[citation needed]. After this Eric Raymond and Bruce Perens founded the Open Source Initiative (OSI), to promote the term "open-source software" as an alternative term for free software. OSI did not agree with the free software movement's position that non-free software is a social problem or that it is unethical,[18] arguing instead that open-source is a superior model for software development.[19]
By 2005, Richard Glass considered the differences to be a "serious fracture" but "vitally important to those on both sides of the fracture" and "of little importance to anyone else studying the movement from a software engineering perspective" since they have had "little effect on the field".[20]
Some free software advocates use the term free and open source software (FOSS) as an inclusive compromise, drawing on both philosophies to bring both free software advocates and open source software advocates together to work on projects with more cohesion. Some users believe that a compromise term encompassing both aspects is ideal, to promote both the user's freedom with the software and also to promote the perceived superiority of an open source development model.
While some people prefer to link the two ideas of "open source software" and "free software" together, it is important to understand the difference because they offer two separate ideas and values. This ambiguity began in 1998 when people started to use the term "open source software" rather than "free software". People in the community of free software used these separate terms as a way to differentiate what they did. The Open Source movement addresses software being open as a practical question as opposed to an ethical dilemma. In other words, it focuses more on the development. The open source movement ultimately determines that non-free software is not the solution of best interest.
On the other hand, the free software movement views non-free software as a social issue and free software as the solution to the problem. Those who work within the free software community have searched for less ambiguous terms in efforts to refine their definition so there is no confusion, but struggle to find words that do not yield vagueness. Although the movements have separate values and goals, people in both the open source community and free software community collaborate when it comes to practical projects.[21]
The switch from the free software movement to the open source movement has had negative effects on the progression of community,according to Christopher Kelty who dedicates a scholarly chapter to the free software movements in "Theorizing Media and Practice". The open source movement denies that selectivity and the privatization of software is unethical. Although the open source movement is working towards the same social benefits as the free software movement, Kelty claims that by disregarding this fundamental belief of the free software advocates, one is destroying the overall argument. If it can be claimed that it is ethical to limit the internet and other technology to only users who have the means to utilize these software, then there is no argument against the way things are at the moment; there is no need to complain if all morality is in affect.[22]

Stallman and Torvalds[edit]

The two most prominent people attached to the movement, Richard Stallman and Linus Torvalds, may be seen as representatives of the value based versus apolitical philosophies, as well as the GNU versus Linux coding styles. Paradoxically as it seems, it is the symbiosisof their works that make up a complete operating system known as GNU/Linux, or just Linux. In the GNU/Linux naming controversy the FSF argues for the term GNU/Linux because GNU was a longstanding project to develop a free operating system, of which they say the kernel was the last missing piece.[23]

Measures of progress[edit]

Ohloh, a web service founded in 2004 and launched in 2006, monitors the development activity in the free software community, providing detailed metrics and quantitative analyses on the growth and popularity of projects and programming languages.

Criticism and controversy[edit]

Should principles be compromised?[edit]

Some, such as Eric Raymond, criticise the speed at which the free software movement is progressing, suggesting that temporary compromises should be made for long-term gains. Raymond argues that this could raise awareness of the software and thus increase the free software movement's influence on relevant standards and legislation.[24]
Others, such as Richard Stallman, see the current level of compromise to be the bigger worry.[25][26]

How will programmers get paid?[edit]

Stallman said that this is where people get the misconception of "free": there is no wrong in programmers' requesting payment for a proposed project. Restricting and controlling the user's decisions on use is the actual violation of freedom. Stallman defends that in some cases, monetary incentive is not necessary for motivation since the pleasure in expressing creativity is a reward in itself (such as music and art).[5]

Monday, June 13, 2011

LINUX

Linux

From Wikipedia, the free encyclopedia
Linux
Tux.svg
Tux the penguin, mascot of Linux[1]
Company / developerMany
Programmed inVarious (Notably Cand Assembly)
OS familyUnix-like
Working stateCurrent
Source modelFree and open source software
Initial release1991
Latest stable release3.9.5 (7 June 2013; 6 days ago) [±][2]
Latest unstable release3.10-rc5 (9 June 2013; 4 days ago) [±][3]
Marketing targetPersonal computers, mobile devices, embedded devices, servers, mainframes, supercomputers
Available language(s)Multilingual
Availableprogramming languages(s)Many
Supported platformsAlpha, 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
Kernel typeMonolithic
UserlandVarious
Default user interfaceMany
LicenseMany[4] ("Linux" trademark owned byLinus Torvalds[5] and administered by theLinux Mark Institute)
Linux (Listeni/ˈlɪnəks/ lin-əks[6][7] or /ˈlnʊks/ lee-nuuks)[8][9][10] is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of Linux is the Linux kernel,[11] an operating system kernel first released on 5 October 1991, by Linus Torvalds.[12][13] Since the C compiler that builds Linux and the main supporting user space system tools and libraries originated in the GNU Project, initiated in 1983 by Richard Stallman, the Free Software Foundation prefers the name GNU/Linux.[14][15]
Linux was originally developed as a free operating system for Intel x86-based personal computers. It has since been ported to more computer hardware platforms than any other operating system. It is a leading operating system on servers and other big iron systems such as mainframe computers and supercomputers:[16][17][18][19] more than 90% of today's 500 fastest supercomputers run some variant of Linux,[20] including the 10 fastest.[21] Linux also runs on embedded systems (devices where the operating system is typically built into the firmware and highly tailored to the system) such as mobile phones, tablet computers, network routers, building automation controls, televisions[22][23] and video game consoles; theAndroid system in wide use on mobile devices is built on the Linux kernel.
The development of Linux is one of the most prominent examples of free and open source software collaboration: the underlying source code may be used, modified, and distributed—commercially or non-commercially—by anyone under licenses such as the GNU General Public License. Typically Linux is packaged in a format known as a Linux distribution for desktop and server use. Some popular mainstream Linux distributions include Debian(and its derivatives such as Ubuntu and Linux Mint), Red Hat Enterprise Linux (and its derivatives such as Fedora and CentOS), Mandriva/Mageia,openSUSE (and its commercial derivative SUSE Linux Enterprise Server), and Arch Linux. Linux distributions include the Linux kernel, supportingutilities and libraries and usually a large amount of application software to fulfill the distribution's intended use.
A distribution oriented toward desktop use will typically include the X Window System and an accompanying desktop environment such as GNOMEor KDE Plasma. Some such distributions may include a less resource intensive desktop such as LXDE or Xfce for use on older or less powerful computers. A distribution intended to run as a server may omit all graphical environments from the standard install and instead include other software such as the Apache HTTP Server and an SSH server such as OpenSSH. Because Linux is freely redistributable, anyone may create a distribution for any intended use. Applications commonly used with desktop Linux systems include the Mozilla Firefox web browser, the LibreOffice office application suite, and the GIMP image editor.

Antecedents[edit]

Andrew S. Tanenbaum (left), author of the MINIXoperating system, and Linus Torvalds (right), principal author of the Linux kernel

Unix[edit]

The Unix operating system was conceived and implemented in 1969 at AT&T's Bell Laboratories in the United States by Ken Thompson,Dennis Ritchie, Douglas McIlroy, and Joe Ossanna. It was first released in 1971 and was initially entirely written in assembly language, a common practice at the time. Later, in a key pioneering approach in 1973, Unix was re-written in the programming language C by Dennis Ritchie (with exceptions to the kernel and I/O). The availability of an operating system written in a high-level language allowed easierportability to different computer platforms. With a legal glitch forcing AT&T to license the operating system's source code to anyone who asked,[24] Unix quickly grew and became widely adopted by academic institutions and businesses. In 1984, AT&T divested itself of Bell Labs. Free of the legal glitch requiring free licensing, Bell Labs began selling Unix as a proprietary product.

GNU[edit]

Richard Stallman, founder of the GNU Project
The GNU Project, started in 1983 by Richard Stallman, had the goal of creating a "complete Unix-compatible software system" composed entirely of free software. Work began in 1984.[25] Later, in 1985, Stallman started the Free Software Foundation and wrote the GNU General Public License (GNU GPL) in 1989. By the early 1990s, many of the programs required in an operating system (such as libraries, compilers, text editors, a Unix shell, and a windowing system) were completed, although low-level elements such as device drivers, daemons, and the kernel were stalled and incomplete.[26]Linus Torvalds has said that if the GNU kernel had been available at the time (1991), he would not have decided to write his own.[27]

BSD[edit]

Although not released until 1992 due to legal complications, development of 386BSD, from which NetBSD, OpenBSD and FreeBSD descended, predated that of Linux. Linus Torvalds has said that if 386BSD had been available at the time, he probably would not have created Linux.[28]

MINIX[edit]

MINIX is an inexpensive minimal Unix-like operating system, designed for education in computer science, written by Andrew S. Tanenbaum. Starting with version 3 in 2005, MINIX became free and was redesigned for "serious" use.

Genesis[edit]

In 1991 while attending the University of Helsinki, Torvalds became curious about operating systems[29] and frustrated by the licensing of MINIX, which limited it to educational use only. He began to work on his own operating system which eventually became the Linux kernel.
Torvalds began the development of the Linux kernel on MINIX, and applications written for MINIX were also used on Linux. Later Linux matured and further Linux development took place on Linux systems.[30] GNU applications also replaced all MINIX components, because it was advantageous to use the freely available code from the GNU Project with the fledgling operating system. (Code licensed under the GNU GPL can be reused in other projects as long as they also are released under the same or a compatible license.) Torvalds initiated a switch from his original license, which prohibited commercial redistribution, to the GNU GPL.[31] Developers worked to integrate GNU components with Linux to make a fully functional and free operating system.[26]

Commercial and popular uptake[edit]

Ubuntu, a popular Linux distribution
Today, Linux systems are used in every domain, from embedded systems to supercomputers,[19][32] and have secured a place in server installations often using the popular LAMP application stack.[33] Use of Linux distributions in home and enterprise desktops has been growing.[34][35][36][37][38][39][40]They have also gained popularity with various local and national governments. The federal government of Brazil is well known for its support for Linux.[41][42] News of the Russian military creating its own Linux distribution has also surfaced, and has come to fruition as the G.H.ost Project.[43] The Indian state of Kerala has gone to the extent of mandating that all state high schools run Linux on their computers.[44][45] China uses Linux exclusively as the operating system for its Loongson processor family to achieve technology independence.[46] In Spain some regions have developed their own Linux distributions, which are widely used in education and official institutions, like gnuLinEx in Extremadura and Guadalinex in Andalusia. Portugal is also using its own Linux distribution Caixa Mágica, used in the Magalhães netbook[47] and the e-escola government program.[48] France and Germany have also taken steps toward the adoption of Linux.[49]
Linux distributions have also become popular in the netbook market, with many devices such as the ASUS Eee PC and Acer Aspire One shipping with customized Linux distributions installed.[50]

Current development[edit]

Torvalds continues to direct the development of the kernel.[51] Stallman heads the Free Software Foundation,[52] which in turn supports the GNU components.[53] Finally, individuals and corporations develop third-party non-GNU components. These third-party components comprise a vast body of work and may include both kernel modules and user applications and libraries. Linux vendors and communities combine and distribute the kernel, GNU components, and non-GNU components, with additional package management software in the form of Linux distributions.