Overview

FreeBSD is a free and open-source Unix-like operating system descended from the Berkeley Software Distribution (BSD). First released in 1993, it is the most widely used BSD-derived OS. FreeBSD delivers a complete operating system — kernel, drivers, userland utilities, and documentation — all developed together as a single project, distinct from the Linux model where the kernel is separate from the system software.

Key Features

• ZFS Filesystem: Advanced, enterprise-grade filesystem with built-in compression, snapshots, replication, and data integrity checking
• Jails: Lightweight OS-level virtualisation that provides secure, isolated environments on a single FreeBSD host
• Ports Collection: Source-based package building system with over 30,000 applications, complemented by the pkg binary package manager
• Performance & Networking: Known for high-performance networking, TCP stack, and storage subsystems; powers major infrastructure components of Apple macOS, TrueNAS, and PlayStation consoles

Platforms

amd64, ARM64, i386, RISC-V, PowerPC (tier 1/2)

Licence

FreeBSD License (BSD 2-Clause), FreeBSD Documentation License

Website

freebsd.org