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 cryptography .

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 complete installation.

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 network services in a distributed environment.

We are pleased to announce the official release of OpenBSD 7.5. This is our 56th release. We remain proud of OpenBSD's record of more than twenty years with only two remote holes in the default install.

We are pleased to announce the official release of OpenBSD 7.6. This is our 57th release. We remain proud of OpenBSD's record of more than twenty years with only two remote holes in the default install. As in our previous releases, 7.6 provides significant improvements, including new features, in nearly all areas of the system.

2024年10月7日 · Introduction to OpenBSD. About OpenBSD; Hardware Support; Manual Pages; Mailing Lists; Migrating to OpenBSD; Reporting Bugs; Supporting the Project. Installation Guide. Overview of the Installation Procedure; Pre-Installation Checklist; Downloading OpenBSD; Creating Install Media; Performing a Simple Install; File Sets; Disk Partitioning ...

2024年5月2日 · This is a partial list of new features and systems included in OpenBSD 7.6. For a comprehensive list, see the changelog leading to 7.6. With this release all files that existed in the first commit in the OpenBSD source repository have been updated, modified or replaced at some point in time, reaching OpenBSD of Theseus.

OpenBSD believes in strong security. Our aspiration is to be NUMBER ONE in the industry for security (if we are not already there). Our open software development model permits us to take a more uncompromising view towards increased security than most vendors are able to.

OpenBSD is officially supported on the following platforms. Official support means that the release install media is known to work, that the architecture can self-compile itself, and that most of the basic tools exist on the architecture.

Quick installer information for people familiar with OpenBSD, and the use of the "disklabel-E" command. If you are at all confused when installing OpenBSD, read the relevant INSTALL.* file as listed above!