The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like operating system. Our efforts emphasize portability, standardization, correctness, proactive security and integrated …

The OpenBSD installer uses a special ramdisk kernel (bsd.rd) that spawns a live environment running entirely in memory. It contains the install script and a small number of utilities needed to perform a …

Oct 22, 2025 · This FAQ is supplemental documentation to the man pages, which are available both in the installed system and online. It covers the latest release of OpenBSD. There are likely new …

OpenBSD is a full-featured UNIX-like operating system available in source and binary form at no charge. OpenBSD integrates cutting-edge security technology suitable for building firewalls and private …

What's New This is a partial list of new features and systems included in OpenBSD 7.5. For a comprehensive list, see the changelog leading to 7.5. Various kernel improvements: Added bt (5) …

Explore supported hardware platforms for OpenBSD with detailed information on compatibility and system requirements.

To ensure that novice users of OpenBSD do not need to become security experts overnight (a viewpoint which other vendors seem to have), we ship the operating system in a Secure by Default mode.

To install, write install77.img or miniroot77.img to a USB stick, plug it into the machine and choose the OpenBSD install menu item in Petitboot. Refer to the instructions in INSTALL.powerpc64 for more …

Apr 13, 2025 · Official OpenBSD repository for accessing and downloading files related to the OpenBSD operating system.

Consult the installation guide for details. Choose a mirror near you from the following list of HTTP (s), FTP and rsync mirrors which provide OpenBSD. See below for the directory layout of mirrors and …