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Frugalware Linux
Linux distribution
Ubuntu Netbook Edition
Linux distribution based on Ubuntu for netbook devices
Garuda OS
Linux distribution
Foresight Linux
Linux distribution
SystemRescue
SystemRescue (Previously known as "SystemRescueCD") is a Linux distribution for x86-64 and IA-32 computers. The primary purpose of SystemRescue is to repair unbootable or otherwise damaged computer systems after a system crash. SystemRescue is not intended to be used as a permanent operating system. It runs from a Live CD, a USB flash drive or any type of hard drive. It was designed by a team led by François Dupoux, and is based on Arch Linux since version 6.0. Starting with version 6.0, it has systemd as its init system.
Kylin
Chinese computer operating system

Mythbuntu
Mythbuntu is a discontinued media center operating system based on Ubuntu, which integrated the MythTV media center software as its main function, and did not install with all of the programs included with Ubuntu.
Pentoo
Pentoo is a Live CD and Live USB designed for penetration testing and security assessment. Based on Gentoo Linux, Pentoo is provided both as 32 and 64-bit installable live CD. Pentoo is also available as an overlay for an existing Gentoo installation. It features packet injection patched Wi-Fi drivers, GPGPU cracking software, and many tools for penetration testing and security assessment. The Pentoo kernel includes grsecurity and PAX hardening and extra patches - with binaries compiled from a hardened toolchain with the latest nightly versions of some tools available.
Sabily
Sabily (, , My Way) is a discontinued Linux distribution based on Ubuntu, designed by and with the intent to be used by followers of Islam.
Originally named Ubuntu Muslim Edition (presented as UbuntuME), development for Sabily was active from 2007 to 2011.
KaOS
KaOS is an independent Linux distribution built around the latest version of the KDE Plasma desktop environment. It includes LibreOffice and other popular software applications based on the Qt software development toolkit.
EasyPeasy
EasyPeasy (formerly named Ubuntu Eee) was a Linux-based operating system for netbooks. EasyPeasy was built upon Debian and Ubuntu, but was customized for low-powered computers and access to web applications. EasyPeasy is maintained as an open source project, though it primarily uses popular web applications or proprietary software over free and open source software alternatives (e.g. Skype over Ekiga) when the functionality offered is deemed better by its users.
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PureOS
PureOS is a Linux distribution focusing on privacy and security, using the GNOME or KDE Plasma desktop environment. It is maintained by Purism for use in the company's Librem laptop computers as well as the Librem 5 and Liberty Phone smartphones.
ALT Linux
Linux distribution

Turbolinux
Turbolinux is a discontinued Japanese Linux distribution targeting Asian users.
Bharat Operating System Solutions
Linux distribution
Parted Magic
Linux distribution for disk partitioning
Kanotix
Kanotix, also referred to as KANOTIX, is an operating system based on Debian, with advanced hardware detection. It can run from an optical disc drive or other media i.e. USB-stick without using a hard disk drive.
OpenMandriva
Linux distribution
Musix GNU/Linux
Linux distribution
AUSTRUMI Linux
Linux distribution
Linux for PlayStation 2
Linux distribution for the PlayStation 2

FreedomBox
alt=Screenshot of the front page of FreedomBox|thumb|Front page of the FreedomBox user interface with most of the applications installed.
FreedomBox is a free software home server operating system based on Debian, backed by the FreedomBox Foundation.
Parsix
Parsix GNU/Linux was a live-CD Linux distribution based on Debian. The Parsix project's goal was to provide a ready-to-use, easy-to-install, desktop and laptop-optimized operating system based on Debian's testing branch and the latest stable release of GNOME. It was possible to install extra software packages from the project's own APT repositories.
MkLinux
MkLinux (Microkernel Linux) is a discontinued open-source experimental operating system for PowerPC Macintosh computers. It was launched in 1995 as a collaboration between the Open Software Foundation (OSF) and Apple Computer, as a critical pivot in Apple's technical and social history. MkLinux became Apple's first official free and open-source software community project, and the debut of Linux on the first Power Macintosh.
Q4OS
Q4OS is a light-weight Linux distribution based on Debian, targeted as a replacement for operating systems that are no longer supported on outdated hardware. The distribution is known for an addon called XPQ4, which adds themes intended to replicate the look and feel of Windows 2000, XP, 7, 8 and 10.
CalyxOS

Freespire
Freespire is a community-driven Linux distribution currently owned by PC/Open Systems LLC. It is derived from Linspire and is composed mostly of free, open source software, while providing users the choice of including proprietary software including multimedia codecs, device drivers and application software.
Clear Linux OS
Linux distribution
LiMux
LiMux was a project launched by the city of Munich in 2004 in order to replace the software on its desktop computers, migrating from Microsoft Windows to free software based on Linux. By 2012, the city had migrated 12,600 of its 15,500 desktops to LiMux. In November 2017 Munich City Council resolved to reverse the migration and return to Microsoft Windows-based software by 2020. In May 2020, it was reported that the newly elected politicians in Munich, while not going back to the original plan of migrating to LiMux wholesale, will prefer Free Software for future endeavours.
Dynebolic
dyne:bolic GNU/Linux is a Live CD/DVD distribution based on the Linux kernel. It is shaped by the needs of media activists, artists and creators to be a practical tool with a focus on multimedia production, that delivers a large assortment of applications. It allows manipulation and broadcast of both sound and video with tools to record, edit, encode, and stream. In addition to multimedia specific programs, dyne:bolic also provides word processors and common desktop computing tools.
Canaima
Linux distribution
UNICOS
UNICOS is a range of Unix and later Linux operating system (OS) variants developed by Cray for its supercomputers. UNICOS is the successor of the Cray Operating System (COS). It provides network clustering and source code compatibility layers for some other Unixes. UNICOS was originally introduced in 1985 with the Cray-2 system and later ported to other Cray models. The original UNICOS was based on UNIX System V Release 2, and had many Berkeley Software Distribution (BSD) features (e.g., computer networking and file system enhancements) added to it.
Source Mage
Open Source Operating System

Asianux
Asianux was a Linux distribution based on Red Hat Enterprise Linux (RHEL) and jointly developed by companies in Japan, China, South Korea, Vietnam, Thailand and Sri Lanka. This project was dissolved in September 2015. The Asianux trademark is held by companies in each country.
ClearOS
ClearOS (also known as the ClearOS System, formerly ClarkConnect) was a Linux distribution by ClearFoundation, with network gateway, file, print, mail, and messaging services.
Artix Linux
Linux distribution

BackBox
BackBox is a penetration test and security assessment oriented Ubuntu-based Linux distribution providing a network and informatic systems analysis toolkit. It includes a complete set of tools required for ethical hacking and security testing.

Fuduntu
Fuduntu Linux was a Fedora-based Linux distribution created by Andrew Wyatt. It was actively developed between 2010 and 2013. It was designed to fit in somewhere between Fedora and Ubuntu. It was notable for providing a 'classic' desktop experience. Although it was optimized for netbooks and other portable computers, it is still a general-purpose OS.
Mobilinux
Mobilinux is a discontinued Linux distribution by MontaVista. It was announced on April 25, 2005.
Unity Operating System
Linux distribution
GeeXboX
GeeXboX (stylized as GEExBox) is a free Linux distribution providing a media center software suite for personal computers. GeeXboX 2.0 and later uses XBMC for media playback and is implemented as Live USB and Live CD options. As such, the system does not need to be permanently installed to a hard drive, as most modern operating systems would. Instead, the computer can be booted with the GeeXboX CD when media playback is desired. It is based on the Debian distribution of Linux.

Finnix
thumb|Finnix 102 default startup on an x86_64 system
Finnix is a Debian-based Live CD operating system, developed by Ryan Finnie and intended for system administrators for tasks such as filesystem recovery, network monitoring and OS installation. Finnix is a relatively small distribution, with an ISO download size of approximately 500 MiB, and is available for the X86-64 architecture. Finnix can be run off a bootable CD, a USB flash drive, a hard drive, or network boot (PXE).

Grml
Grml is a Linux distribution based on Debian. It is designed to run mainly from a live CD, but can be made to run from a USB flash drive. Grml aims to be well-suited to system administrators (sysadmin) and other users of text tools. It includes an X Window System server and a few minimalist window managers such as wmii, Fluxbox, and openbox to use the graphical programs like Mozilla Firefox which are included in the distribution.
Familiar Linux
Linux distribution for iPAQ machines and other PDAs
IPFire
IPFire is a hardened open source Linux distribution that primarily performs as a router and a firewall; a standalone firewall system with a web-based management console for configuration.
ROSA Linux
Russian Linux distribution
Calculate Linux
Linux distribution

Azure Linux
Microsoft open source operating system
Vyatta
Vyatta is a software-based virtual router, virtual firewall and VPN product for Internet Protocol networks (IPv4 and IPv6). A free download of Vyatta has been available since March 2006. The system is a specialized Debian-based Linux distribution with networking applications such as Quagga, OpenVPN, and many others. A standardized management console, similar to Juniper JUNOS or Cisco IOS, in addition to a web-based GUI and traditional Linux system commands, provides configuration of the system and applications. In recent versions of Vyatta, web-based management interface is supplied only in th

Ubuntu Unity
Ubuntu-based Linux distribution
Korora
Linux distribution

LXLE Linux
lightweight Linux distribution
Libranet
Libranet was an operating system based on Debian.

Pinguy OS
Linux distribution
SmoothWall
Smoothwall (formerly styled as SmoothWall) is a Linux distribution designed to be used as an open source firewall. Smoothwall is configured via a web-based GUI and requires little or no knowledge of Linux to install or use.
Openmoko Linux
mobile operating system developed by the Openmoko project
Open Enterprise Server
computing platform for delivery of shared network services
Porteus
Linux distribution
Mer
open-source system software that provides essential OS features, but not a kernel or GUI
Dragora GNU/Linux-libre
Linux distribution