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The FreeBSD source code is generally released under a permissive BSD license, as opposed to the copyleft GPL used by Linux. The project includes a security team overseeing all software shipped in the base distribution. Third-party applications may be installed using the pkg package management system or from source via FreeBSD Ports. [8]
NetBSD is a freely redistributable, open source version of the Unix-derivative Berkeley Software Distribution (BSD) computer operating system. It was the second open source BSD descendant to be formally released, after 386BSD, and continues to be actively developed.
The BSD license is a simple license that merely requires that all code retain the BSD license notice if redistributed in source code format, or reproduce the notice if redistributed in binary format. The BSD license (unlike some other licenses e.g. GPL) does not require that source code be distributed at all.
The various open source BSD projects generally develop the kernel and userland programs and libraries together, the source code being managed using a single central source repository. In the past, BSD was also used as a basis for several proprietary versions of UNIX, such as Sun 's SunOS , Sequent 's Dynix , NeXT 's NeXTSTEP , DEC 's Ultrix and ...
OpenBSD is a security-focused, free software, Unix-like operating system based on the Berkeley Software Distribution (BSD). Theo de Raadt created OpenBSD in 1995 by forking NetBSD 1.0. [4]
The NetBSD source code repository was established on 21 March 1993 and the first official release, NetBSD 0.8, was made on 19 April 1993. [13] This was derived from 386BSD 0.1 plus the version 0.2.2 unofficial patchkit, with several programs from the Net/2 release missing from 386BSD re-integrated, and various other improvements.
ClonOS – FreeBSD based distro for virtual hosting platform and appliance. Darwin – The UNIX-based, open-source foundation of macOS, [1] iOS, iPadOS, watchOS, tvOS, visionOS, and bridgeOS, includes code from FreeBSD and the Mach kernel from Carnegie Mellon; DesktopBSD – [defunct] KDE-based desktop-oriented distribution
It previously existed as an independent open-source operating system, first released by Apple Inc. in 2000. It is composed of code derived from NeXTSTEP, FreeBSD, [3] other BSD operating systems, [6] Mach, and other free software projects' code, as well as code developed by Apple. Darwin's official mascot is Hexley the Platypus.