Unsure what a Linux distribution is? Read the Linux Distribution Guide
PicUntu is an Ubuntu based unix environment, created to run on RK3066 chipset devices.
Pinguy OS is based on Ubuntu 10.04 LTS and is built to have more eye-candy (CoverGloobus, Gloobus Preview, GNOME Do, Docky) than Ubuntu and to be a little bit more user friendly.
Pioneer Linux is a derivative of Ubuntu. Pioneer Linux is targeted at new Linux users as well as experienced Linux users, and provides compatibility with many existing, proprietary applications
Pisi Linux is a Linux distribution based on the old Pardus Linux with its famous PISI package system.
Point Linux aims to combine the power of Debian GNU/Linux with the productivity of MATE, the Gnome 2 desktop environment fork. Point Linux provides an easy to set up and use distribution for users, looking for a fast, stable and predictable desktop.
Proxmox Virtual Environment is an easy to use Open Source virtualization platform for running Virtual Appliances and Virtual Machines.
Qubes is an open source operating system designed to provide strong security for desktop computing. Qubes is based on Xen, X Window System, and Linux.
Quelitu is a Linux operating system based on Lubuntu/Bodhi Linux.
RapidDisk LX is an open source iSCSI Target Linux distribution.
RebeccaBlackOS is a Linux distro using Wayland.
ROCK is a Distribution Build Kit. You can configure your personal build of ROCK and easily build your own distribution (see the screenshots). It is software for managing operating environments. In a way it is a software development toolkit for building OS solutions.
The ROCK/UML Project aims to create a ROCK sub-distribution who can be installed, primarily, under ROCK - providing tools to quickly and easily set up virtual servers.
Rocks Cluster Distribution
Rocks Cluster Distribution is an Open Source High Performance Linux Cluster Solution.
ROOT Linux is an advanced GNU/Linux operating system originally based on Slackware Linux 7.1. It aims to be fast, stable and flexible.
SL is a Linux release put together by various labs and universities around the world. It's primary purpose is to reduce duplicated effort of the labs, and to have a common install base for the various experimentors. The base SL distribution is basically Enterprise Linux, recompiled from source. Our main goal for the base distribution is to have everything compatible with Enterprise, with only a few minor additions or changes. An example of of items that were added are Pine, and OpenAFS.
Scientific Linux CERN 4
A CERN customized version of Scientific Linux which is assembled from freely available Red Hat Enterprise Linux 4 sources.
Sflack Linux is an unofficial port of Slackware to the x86_64 architecture.
SGI ProPack for Linux provides HPC libraries and other system level software to complement and extend a Linux OS distribution to help meet customer demand for solutions to HPC, Storage, and Visualization problems. SGI ProPack is designed and required to be used with SGI Advanced Linux® Environment, which is based on Red Hat Enterprise Linux Advanced Server* for providing the base OS and common system software.
Shilosh OS provides a secure and stable OS, based on highly modified Linux Kernel, own package system, like "BSD Ports". Compatible with x86, Power PC. Easy to use of any level users. Complete Documentantion in many languages. 99% compatible with Windows.
Siduction is a desktop-oriented operating system and live medium based on the "unstable" branch of Debian. The distro was forked from aptosid in late 2011.
Simple Rescue CD
This package is a small Linux rescue CD, suitable for booting systems that have become unbootable due to filesystem corruption or whatever. As an added bonus, everything is loaded into RAM - once the machine has booted, you can remove the CD from the drive.
Simply GNUstep is aimed at providing a OpenStep feeling from bootup on. This is a stripped down distribution than most, so as to provide ease of use.
SME Server is a leading distribution for small and medium enterprises. It stands apart from the competition by shipping with most common functionality preconfigured and features a number of popular additional enhancements in the form of downloadable 'contributions'.
Server optimized Linux: independent from other Linux distributions, it was built from the original source packages and is optimized for heavy-duty server work. It contains all common server applications, and features XML boot and script technology that makes it easy to configure and make the server work
SolusOS is a modern Linux operating system based on the hugely popular Debian Linux distribution.
SolydX and SolydK are Debian based distributions with the Xfce and KDE desktop.SolydXK aims to be simple to use, providing an environment that is both stable and secure.
Sonar is an accessible distribution using assistive technology built from Ubuntu.
Sorcerer is a source-based Linux distribution for system administrators. The sources are downloaded directly from software authors' homepages and mirrors. Then, they are compiled with the architecture and optimizations that the system administrator specifies. Finally, it is installed, tracked, and archived for easy removal and upgrades. Sorcerer has both command line and menu driven source mangement programs.
Source Mage is a source-based GNU/Linux distribution based on a sorcerous metaphor of "casting" and "dispelling" packages, which we refer to as "spells".
SparkyLinux is a lightweight, fast and simple Linux distribution disigned for both old and new computers featuring customized Enlightenment and LXDE desktops. It has been built on Debian GNU/Linux testing.
Speakimage is a rescue CD based on Linux 2.4.19 with ext3, ReiserFS, XFS, JFS, BeFS, and speakup for the blind. It provides everything required for partitionning and formatting hard disks and making backups of system partitions
Specifix has built a Linux distributions around the Conary system to both showcase the abilities Conary provides and to provide a starting point for customization. This disitribution is still immature, but we encourage anyone interested in Conary and flexible Open Source solutions to give it a try.
SprezzOS is a Debian-based Linux distribution for people who enjoy experimentation, change and a deep understanding of their tools.
Stampede Linux aims to be designed to both perform tasks and maintain speed and reliability. It is no longer being developed.
StartCom Enterprise Linux
StartCom Enterprise Linux, which is based on the RedHat AS-3 source code, is the ultimate solution for middle sized servers to large data centers. The current version AS-3.0.1 (AS stands for Advanced Server) supports the largest commodity-architecture servers with up to 16 CPUs and 64GB (on X86 systems) of main memory, Global File System - for highly scalable, high performance data sharing in multi-system configurations. Included in this distribution are a comprehensive collection of open source server applications like Mail, File (SMB/NFS), DNS, Web, FTP and a complete desktop environment.
StartCom Linux Developer Edition
StartCom Developer Edition incorporates the best of Enterprise Linux, with addition of the Eclipse IDE. Eclipse provides a fully featured Integrated Development Environment (IDE) based on the open source Eclipse project for application developers.
StartCom Linux MultiMedia Edition
Specially designed for the demanding home user, the MultiMedia Edition lets you easily communicate with your friends and family members over the Internet, browse the news or watching the latest DVD movie you just bought.
StartCom Linux Office Edition
The Office Edition uses the same strong base as the Enterprise Linux, however geared specially for day-to-day office use.
Sun Java Desktop System
The Sun Java Desktop System is a secure, comprehensive, and affordable enterprise desktop software solution that combines the best of open source innovation with significant contributions from Sun. Initially provided with a Linux OS, Java Desktop System is now also integrated with the Solaris 10 Operating System.
SymphonyOS is based on an advanced GNU/Linux base system. Symphony provides Linux?s renowned stability and immunity to Windows viruses along with what we consider to be the easiest to use interface out there, our Mezzo Desktop Environment.
SystemRescueCd is a Linux system on a bootable cdrom for repairing your system and your data after a crash. It also aims to provide an easy way to carry out admin tasks on your computer, such as creating and editing the partitions of the hard disk. It contains a lot of system utilities (parted, partimage, fstools, ...) and basic ones (editors, midnight commander, network tools). It aims to be very easy to use: just boot from the cdrom, and you can do everything. The kernel of the system supports most important file systems (ext2/ext3, reiserfs, xfs, jfs, vfat, ntfs, iso9660), and network ones (samba and nfs). Read more
T2 SDE is not just a Linux distribution - it is a flexible Open Source System Development Environment or Distribution Build Kit (some might even name it Meta Distribution ...). T2 allows the creation of custom distributions with bleeding edge technology, up-to-date packages and integrated support for cross compilation. Currently the Linux kernel is normally used - but we are expanding to Minix, Hurd, OpenDarwin and OpenBSD - more to come.
Tao Linux (pronounced 'dow' Linux) is one of several projects to build a free Linux distribution from the sources used in the Red Hat Enterprise product line.
ThinLinc Client Operating System
TLCOS (ThinLinc Client Operating System) is a Linux Distribution which is adapted for the ThinLinc Client. It can be used to remake an old computer to a dedicated thin client. TLCOS is based on RedHat 7.3.
Tin Hat is a distribution derived from hardened Gentoo. It aims to provide a very secure, stable, and fast desktop environment that lives purely in RAM. Tin Hat boots from CD, or optionally USB pen drive, but it is not a LiveCD in that it does not mount any file system from the boot device. Rather, Tin Hat employs a massive squashfs image which expands into tmpfs upon booting. This makes for long boot times, but remarkable speeds during human-computer interaction.
Singapore based Tomahawk Computers was launched in April 2005 with the goal of creating a modular operating system, in which most components are open source packages
Topologilinux is a free Linux distribution to be run on top or inside your existing windows system. The main thing with Topologilinux is that it does not require any partitioning at all. It uses a single file as a Linux root system.
Turbolinux 10 F... is the latest desktop operating solution from Turbolinux that brings Multimedia to your fingertips. 10 F extends functionality to support a variety of streaming video, audio and multimedia content delivered over broadband. Turbolinux is the Turbolinux was the first Linux distribution company to partner with CyberLink to offer PowerDVD for Linux. Watch DVDs encrypted with CSS (Content Scrambling System) legally.
Turbolinux for AMD64
Turbolinux for AMD64 is a 64-bit Linux operating system specially designed for the AMD Opteron? and AMD Athlon 64? processor families, designed by Advanced Micro Devices (AMD). Turbolinux for AMD64 integrates a variety of powerful and user-friendly features currently available in our Turbolinux operating systems designed for x86-based systems, while fully utilizing the advantages of open source technologies.
Turbolinux Server is a second-generation Linux operating system, incorporating the latest advances available in the 2.6 kernel, and aims to meet your mid-to-high-range server needs. 10S offers speed, security, as well as a suite of carefully selected open source and commercial software to offer users a portfolio of solutions.
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