They called this modified version "Berkeley Unix" or " Berkeley Software Distribution" (BSD), implementing features such as TCP/IP, virtual memory, and the Berkeley Fast File System. Supported by funding from DARPA, the Computer Systems Research Group started to modify and improve AT&T Research Unix. In 1974, Professor Bob Fabry of the University of California, Berkeley, acquired a Unix source license from AT&T. Main article: FreeBSD version history Background The other BSD systems ( OpenBSD, NetBSD, and DragonFly BSD) also contain a large amount of FreeBSD code, and vice-versa. Much of FreeBSD's codebase has become an integral part of other operating systems such as Darwin (the basis for macOS, iOS, iPadOS, watchOS, and tvOS), TrueNAS (an open-source NAS/ SAN operating system), and the system software for the PlayStation 3 and PlayStation 4 game consoles. A wide range of additional third-party applications may be installed from binary packages using the pkg package management system or from source via FreeBSD Ports, or by manually compiling source code. The FreeBSD project includes a security team overseeing all software shipped in the base distribution. the project delivers a kernel, device drivers, userland utilities, and documentation, as opposed to Linux only delivering a kernel and drivers, and relying on third-parties for system software FreeBSD source code is generally released under a permissive BSD license, as opposed to the copyleft GPL used by Linux. įreeBSD has similarities with Linux, with two major differences in scope and licensing: FreeBSD maintains a complete system, i.e. In 2005, FreeBSD was the most popular open-source BSD operating system, accounting for more than three-quarters of all installed and permissively licensed BSD systems. The first version of FreeBSD was released in 1993. Unix shells: sh or tcsh (user-selectable)įreeBSD License, FreeBSD Documentation LicenseįreeBSD is a free and open-source Unix-like operating system descended from the Berkeley Software Distribution (BSD). Monolithic with dynamically loadable modules Servers, workstations, embedded systems, network firewalls
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