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FreeBSD maintains a complete system, delivering a kernel, device drivers, userland utilities, and documentation, as opposed to Linux only delivering a kernel and drivers, and relying on third-parties such as GNU for system software. [7] The FreeBSD source code is generally released under a permissive BSD license, as opposed to the copyleft GPL ...
The FreeBSD Ports collection is a package management system for the FreeBSD operating system. Ports in the collection vary with contributed software. There were 38,487 ports available in February 2020 [1] and 36,504 in September 2024. [2] It has also been adopted by NetBSD as the basis of its pkgsrc system.
TrueNAS/FreeNAS – a network-attached storage (NAS) operating system based on FreeBSD. FuryBSD – a FreeBSD-based operating system, founded after Project Trident decided to build on Void Linux instead of TrueOS. Discontinued in October 2020. [6] GhostBSD – a FreeBSD-based operating system with OpenRC and OS packages.
The PlayStation 4 operating system Zrouter: FreeBSD based firmware for embedded devices ULBSD: ULBSD is a Unix-like, desktop-oriented operating system based on FreeBSD. It aims to be easy to install and ready-to-use immediately by providing pre-installed graphical KDE5 user desktop environment. ravynOS (formerly airyxOS)
IronPort AsyncOS is based on a FreeBSD kernel [16] Isilon Systems' OneFS, the operating system used on Isilon IQ-series clustered storage systems [17] Juniper Networks Junos [18] Junos prior to 5.0 was based on FreeBSD 2.2.6; Junos between 5.0 and 7.2 (inclusive) is based on FreeBSD 4.2; Junos 7.3 and higher is based on FreeBSD 4.10
The kernel of Darwin is XNU, a hybrid kernel which uses OSFMK 7.3 [14] (Open Software Foundation Mach Kernel) from the OSF, various elements of FreeBSD (including the process model, network stack, and virtual file system), [15] and an object-oriented device driver API called I/O Kit. [16]
KGDB was implemented as part of the NetBSD kernel in 1997, [1] and FreeBSD in version 2.2. The concept and existing remote gdb protocol were later adapted as a patch to the Linux kernel. A scaled-down version of the Linux patch was integrated into the official Linux kernel in version 2.6.26.
The jail mechanism is an implementation of FreeBSD's OS-level virtualisation that allows system administrators to partition a FreeBSD-derived computer system into several independent mini-systems called jails, all sharing the same kernel, with very little overhead [1].