Debian GNU/Linux was first announced in 1993. Its founder, Ian Murdock, envisaged the creation of a completely non-commercial project developed by hundreds of volunteer developers in their spare time. With sceptics far outnumbering optimists at the time, it was destined to disintegrate and collapse, but the reality was very different. Debian not only survived, it thrived and, in less than a decade, it became the largest Linux distribution and possibly the largest collaborative software project ever created!
The success of Debian GNU/Linux can be illustrated by the following numbers. It is developed by over 1,000 volunteer developers, its software repositories contain more than 20,000 packages (compiled for 11 processor architectures), and it is responsible for inspiring over 120 Debian-based distributions and live CDs. These figures are unmatched by any other Linux-based operating system. The actual development of Debian takes place in three main branches (or four if one includes the bleeding-edge “experimental” branch) of increasing levels of stability: “unstable” (also known as “sid”), “testing” and “stable”. This progressive integration and stabilisation of packages and features, together with the project’s well-established quality control mechanisms, has earned Debian its reputation of being one of the best-tested and most bug-free distributions available today.
However, this lengthy and complex development style also has some drawbacks: the stable releases of Debian are not particularly up-to-date and they age rapidly, especially since new stable releases are only published once every 1 – 3 years. Those users who prefer the latest packages and technologies are forced to use the potentially buggy Debian testing or unstable branches. The highly democratic structures of Debian have led to controversial decisions and gave rise to infighting among the developers. This has contributed to stagnation and reluctance to make radical decisions that would take the project forward.

Debian 4.0 Screenshot
Although Fedora was formally unveiled only in September 2004, its origins effectively date back to 1995 when it was launched by two Linux visionaries — Bob Young and Marc Ewing — under the name of Red Hat Linux. The company’s first product, Red Hat Linux 1.0 “Mother’s Day”, was released in the same year and was quickly followed by several bug-fix updates. In 1997, Red Hat introduced its revolutionary RPM package management system with dependency resolution and other advanced features which greatly contributed to the distribution’s rapid rise in popularity and its overtaking of Slackware Linux as the most widely-used Linux distribution in the world. In later years, Red Hat standardised on a regular, 6-month release schedule.
The beginnings of openSUSE date back to 1992 when four German Linux enthusiasts — Roland Dyroff, Thomas Fehr, Hubert Mantel and Burchard Steinbild — launched the project under the name of SuSE (Software und System Entwicklung) Linux. In the early days, the young company sold sets of floppy disks containing a German edition of Slackware Linux, but it wasn’t long before SuSE Linux became an independent distribution with the launch of version 4.2 in May 1996. In the following years, the developers adopted the RPM package management format and introduced YaST, an easy-to-use graphical system administration tool. Frequent releases, excellent printed documentation, and easy availability of SuSE Linux in stores across Europe and North America resulted in growing popularity of the distribution.
The launch of Ubuntu was first announced in September 2004. Although a relative newcomer to the Linux distribution scene, the project took off like no other before, with its mailing lists soon filled in with discussions by eager users and enthusiastic developers. In the few years that followed, Ubuntu has grown to become the most popular desktop Linux distribution and has greatly contributed towards developing an easy-to-use and free desktop operating system that can compete well with any proprietary ones available on the market.