NetBSD Operating System

NetBSD is a free, secure, and highly portable Unix-like operating system based on BSD, renowned for its clean design and extraordinary portability across diverse hardware architectures. Forked from 386BSD in 1993 by Chris Demetriou, Theo de Raadt, Adam Glass, and Charles Hannum, NetBSD is famous for its motto of course it runs NetBSD. Key features: extraordinary portability supporting over 50 hardware architectures including x86, x86_64, ARM, ARM64, MIPS, PowerPC, SPARC, VAX, Amiga, HP300, and embedded systems, making it the most portable operating system in the world. pkgsrc package manager (Package Source) for cross-platform package management, also portable to Linux, macOS, Solaris, and Illumos with over 20,000 packages. Clean and well-documented source code emphasizing correctness and simplicity. UVM virtual memory system for efficient memory management. NPF firewall (NetBSD Packet Filter) for modern network security with NAT, normalization, and connection tracking. Verified exec for secure process execution. Veriexec file integrity subsystem for detecting unauthorized modifications. Wedge GEOM-like system for disk partition management. Rump kernel architecture for running kernel drivers in userspace for testing and development. Strong cryptographic framework. Cross-compilation support out of the box for all supported architectures. Wireless networking including hostap mode for access point functionality. Xen dom0 and domU support. Used in spacecraft (NASA), embedded devices, routers, and research environments. Open development model with public source via CVS and Git mirrors.