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|OS family||Unix (SVR4)|
|Source model||Open source with binary blobs|
|Platforms||IA-32, x86-64, SPARC, ARM (under development)|
|License||CDDL, BSD, MIT|
Illumos (stylized as illumos) is a partly free and open-source Unix operating system. It is based on OpenSolaris, which was based on System V Release 4 (SVR4) and the Berkeley Software Distribution (BSD). Illumos comprises a kernel, device drivers, system libraries, and utility software for system administration. This core is now the base for many different open-sourced Illumos distributions, in a similar way in which the Linux kernel is used in different Linux distributions.
Illumos was announced via webinar on Thursday, 3 August 2010, as a community effort of some core Solaris engineers to create a truly open source Solaris by swapping closed source bits of OpenSolaris with open implementations.
The original plan explicitly stated that Illumos would not be a distribution or a fork. However, after Oracle announced discontinuing OpenSolaris, plans were made to fork the final version of the Solaris ON kernel allowing Illumos to evolve into a kernel of its own.
As of 2010NFS lock manager, the crypto module, and many device drivers to create a Solaris-like OS with no closed, proprietary code. As of 2012 , development emphasis includes transitioning from the historical compiler, Studio, to GCC. The "userland" software is now built with GNU make and contains many GNU utilities such as GNU tar., efforts focused on libc, the
The Illumos Foundation has been incorporated in the State of California as a 501(c)6 trade association, with founding board members Jason Hoffman (formerly at Joyent), Evan Powell (Nexenta), and Garrett D'Amore. As of August 2012, the foundation was in the process of formalizing its by-laws and organizational development.
At OpenStorage Summit 2010, the new logo for Illumos was revealed, with official type and branding to follow over.
Its primary development project, illumos-gate, derives from OS/Net (aka ON), which is a Solaris kernel with the bulk of the drivers, core libraries, and basic utilities, similar to what is delivered by a BSD "src" tree. It was originally dependent on OpenSolaris OS/Net, but a fork was made after Oracle silently decided to close the development of Solaris and unofficially killed the OpenSolaris project.
Distributions, at illumos.org