Parabola GNU/Linux-libre Installler
|Initial release||October 26, 2009|
|Latest release||(Rolling release) / Installation medium 2015.08.01|
|Kernel type||Monolithic (Linux-libre)|
|Default user interface||ZSH|
|License||Exclusively free licenses per GNU Free System Distribution Guidelines (GNU FSDG) adopted in Parabola GNU/Linux-libre Social Contract|
Parabola (officially known as Parabola GNU/Linux-libre) is a computer operating system for the i686 and x86-64 architectures based on the Arch Linux distribution, but using only free software. It includes the GNU OS tools and the Linux-libre kernel instead of the generic Linux kernel. The development focuses on simplicity, community involvement and use of the latest free software packages. Parabola GNU/Linux-libre is listed by the Free Software Foundation as a completely free operating system.
Parabola GNU/Linux-libre uses a rolling release model, such that a regular system update is all that is needed to obtain the latest software.
Parabola was originally proposed by members of the gNewSense IRC channel in 2009. Members of different Arch Linux communities, especially Spanish-speaking members, started the development and maintenance of the project software and documentation.
Parabola had a MIPS port in the past to provide support for running it on the Chinese Loongson processor. Lack of developer resources has resulted in its discontinuation and the final commit to the MIPS repository took place in July 2014. 
In February 2012 Dmitrij D. Czarkoff reviewed Parabola for OSNews. Czarkoff reported that on his test computer a number of hardware problems surfaced, due to lack of free firmware. He said "That effectively means that many devices are not supported in Parabola. Eg., after installing it on my Acer Aspire One 531h netbook I couldn't use my Broadcom bluetooth module and Intel's WiFi/WiMax Link 5150 adapter. (I still could use my HTC Magic with a custom Gingerbread ROM as a USB 3G/WiFi modem, though having something always connected to USB port is pretty annoying on laptop and specifically on netbook.)" Czarkoff also criticized the lack of documentation available for Parabola. He concluded "The overall impression of the Parabola GNU/Linux user experience exactly matches the one of Arch: a system with easy and flexible installation and configuration process and good choice of free software packages. Though the lack of documentation spoils the user experience, the Arch Linux resources can be used to further configure and extend the distribution. If my hardware would allow, I would probably stick with Parabola."
Until version 4.0.0, Parabola's package manager lacked support for signed packages. Signed packages and metadata were not verified for authenticity by pacman during the download-install process. Without package authentication checking, tampered-with or malicious repository mirrors can compromise the integrity of a system. Pacman 4 allowed verification of the package database and as of April 2012 every package is signed.
Differences from Arch Linux
The project uses only 100% free software from the official Arch Linux repositories for the i686 and x86-64 architectures. It uses free replacements when possible, such as the Linux-libre kernel instead of the generic Linux kernel.
Parabola has established a system distribution commitment, Parabola GNU/Linux-libre Social Contract commits the project to the free software community, democracy, to view itself as only competing against nonfree software and to respect Arch Linux's philosophy of simplicity. The contract have adopted GNU Free System Distribution Guidelines which made Parabola to a qualified free distribution.
- GNU/Linux naming controversy
- List of Linux distributions based on Arch
- List of Pacman-based Linux distributions
- Parabola Hackers development team,
- "Get Parabola". parabola.nu.
- "List of Free GNU/Linux Distributions". Free Software Foundation. 21 December 2011.
- "Parabola GNU/Linux". DistroWatch. 1 November 2011. Retrieved 12 January 2012.
- "Parabola support for mips64el discontinued - Parabola GNU/Linux-Libre Wiki". Wiki.parabola.nu. 2015-06-17. Retrieved 2015-07-01.
- Smith, Brett (20 May 2011). "Parabola GNU/Linux joins the FSF list of free distributions". Free Software Foundation.
- Czarkoff, Dmitrij D. (2 February 2012). "Parabola GNU/Linux: Freedom Packaged". OSNews. Retrieved 14 February 2012.
- "Attacks on Package Managers". cs.arizona.edu. 2008-07-10. Archived from the original on 5 September 2010. Retrieved 2010-09-14.
- "blacklist.git - Unfree packages found in ArchLinux repos". Parabola GNU/Linux.
- "Parabola/GNU Linux Social Contract". Parabola GNU/Linux. 30 August 2011. Retrieved 12 January 2012.
- "Download Parabola GNU/Linux". Parabola GNU/Linux.
- "Liberate Arch Linux with Parabola GNU/Linux". Parabola GNU/Linux. 16 September 2011.
- Official website
- Parabola GNU/Linux appears on news section on SOLAR website (Software Libre Argentina)