Recommended by OpenBSD Public

The first sentence of this book is "This is a book about building the network you need." Taking it from there, Peter walks you through the whys and the hows of building the high performance, low maintenance network you need, using OpenBSD tools.

A guide to what you need to know about SSH. This book will help you eliminate passwords on your network, tunnel unencrypted protocols through secure channels, build VPNs with OpenSSH, and more. Focuses on the OpenSSH server, the OpenSSH client, and the PuTTY client.

Michael W. Lucas brings us the long anticipated second edition of his wildly successful book about using OpenBSD. This book covers all aspects of the OpenBSD system for new UNIX and BSD users alike.

At 549 pages plus an index, this book must be considered comprehensive. McKusick, Bostic and Karels are well known as prime movers at Berkeley CSRG (Computer Systems Research Group) during the 4.3/4.4BSD period.

This book is now in its third edition. It discusses hundreds of neat tricks, little-known techniques, and add-on utilities. Be aware that many of the utilities are either included with OpenBSD or, more commonly, are already available as ports or packages.

This is an excellent book on Unix system administration.

This book covers many fundamental tasks in system administration. It includes examples for a wide range of Unix operating systems, including BSD.

This book leads its reader through all the low-level kernel models for multi-processing architectures.

Although the UNIX described in this book is to BSD as a Model T Ford is to a 70's Mustang or Thunderbird, UNIX inventor Ken Thompson claims that "After 20 years, this is still the best exposition of the workings of a 'real' operating system."

Brian Kernighan had a hand in two other books which we recommend even though they're not UNIX specific, but are useful to programmers on UNIX and elsewhere. This book covers practical programming considerations for C, C++ and Java. Highly recommended.

This book is similar to The Practice of Programming, but older. The examples are given in Fortran and PL/I.

This is a clear and concise guide to the C programming language, perhaps the only one you will ever need. It focuses strictly on the C language, not how to use your compiler or anything else.

Covers code auditing, design and operational review, types of vulnerabilities, privilege models, signals, interprocess communication, synchronization, networking and more. Lots of examples and real world code snippets.

DNS is one of the oldest protocols on the Internet, and was designed for a network without hostile users. Anyone who wants to break into a network starts by investigating the target's Domain Name Service.

The Definitive Guide. OpenSSH is covered in detail.