GNU variants
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GNU variants

GNU variants (also called GNU distributions or distros for short[vague]) are operating systems based upon the GNU operating system (the Hurd kernel, the GNU C library, system libraries and application software like GNU coreutils, bash, the Guix package manager, etc). According to the GNU project and others, these also include most operating systems using the Linux kernel and a few others using BSD-based kernels.

GNU users usually obtain their operating system by downloading GNU distributions, which are available for a wide variety of systems ranging from embedded devices (for example, LibreCMC) and personal computers (for example, Debian GNU/Hurd) to powerful supercomputers (for example, Rocks Cluster Distribution).

Hurd is one of two official kernels developed for the GNU system, and was the exclusive official kernel before Linux-libre also became an official GNU package. Debian GNU/Hurd was discussed for a release as technology preview with Debian 7.0 Wheezy, however these plans were discarded due to the immature state of the system. However the maintainers of Debian GNU/Hurd decided to publish an unofficial release on the release date of Debian 7.0. Debian GNU/Hurd is not considered yet to provide the performance and stability expected from a production system. Among the open issues are incomplete implementation of Java and X.org graphical user interfaces and limited hardware driver support. About two thirds of the Debian packages have been ported to Hurd.

Arch Hurd is a derivative work of Arch Linux, porting it to the GNU Hurd system with packages optimised for the Intel P6 architecture. Their goal is to provide an Arch-like user environment (BSD-style init scripts, pacman package manager, rolling releases, and a simple set up) on the GNU Hurd, which is stable enough for at least occasional use. Currently it provides a LiveCD for evaluation purposes and installation guides for LiveCD and conventional installation.

The term GNU/Linux or GNU+Linux is used by the FSF and its supporters to refer to an operating system where the Linux kernel is distributed with a GNU system software. Such distributions are the primary installed base of GNU packages and programs and also of Linux. The most notable official use of this term for a distribution is Debian GNU/Linux.

As of 2018, the only GNU variants recommended by the GNU Project for regular use are Linux distributions committed to the Free System Distribution Guidelines; most of which refer to themselves as "GNU/Linux" (like Debian), and actually use a deblobbed version of the Linux kernel (like the Linux-libre kernel) and not the mainline Linux kernel.

Debian GNU/kFreeBSD is an operating system for IA-32 and x86-64 computer architectures. It is a distribution of GNU with Debian package management and the kernel of FreeBSD. The k in kFreeBSD is an abbreviation for kernel of, and reflects the fact that only the kernel of the complete FreeBSD operating system is used. The operating system was officially released with Debian Squeeze (6.0) on February 6, 2011. One Debian GNU/kFreeBSD live CD is Ging, which is no longer maintained.

Debian GNU/NetBSD was an experimental port of GNU user-land applications to NetBSD kernel. No official release of this operating system was made; although work was conducted on ports for the IA-32 and DEC Alpha architectures, it has not seen active maintenance since 2002 and is no longer available for download.

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