Absolute OpenBSD: UNIX for the Practical Paranoid (2nd by Michael W. Lucas

By Michael W. Lucas

retail quality

The definitive advisor to OpenBSD

Foreword by means of Henning Brauer, OpenBSD PF Developer

OpenBSD, the dependent, hugely safe Unix-like working process, is ordinary because the foundation for serious DNS servers, routers, firewalls, and extra. This long-awaited moment version of Absolute OpenBSD keeps writer Michael Lucas's trademark undemanding and sensible strategy that readers have loved for years. You'll examine the intricacies of the platform, the technical info at the back of definite layout judgements, and most sensible practices, with bits of humor sprinkled all through. This variation has been thoroughly up-to-date for OpenBSD 5.3, together with new insurance of OpenBSD's boot method, security measures like W^X and ProPolice, and complicated networking techniques.

You'll learn the way to:
* deal with community site visitors with VLANs, trunks, IPv6, and the PF packet filter
* Make software program administration quickly and powerful utilizing the ports and programs system
* supply clients in simple terms the entry they want with teams, sudo, and chroots
* Configure OpenBSD's safe implementations of SNMP, DHCP, NTP, sensors, and more
* customise the deploy and improve techniques in your community and undefined, or construct a customized OpenBSD release

Whether you're a brand new person trying to find an entire advent to OpenBSD or an skilled sysadmin trying to find a refresher, Absolute OpenBSD, second Edition provides you with every little thing you must grasp the intricacies of the world's safest working system.

"The definitive ebook on OpenBSD will get a long-overdue refresh."

-Theo de Raadt, OpenBSD Founder

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Additional info for Absolute OpenBSD: UNIX for the Practical Paranoid (2nd Edition)

Example text

I wanted this book to come out in 2010. Life happened. It happens. Then life kept happening, apparently with malice aforethought, for four years. My fans waited. The publisher waited. The OpenBSD folks waited. And my long-suffering wife has waited—specifically, for me to quit grum­ bling that I had to take time away from the crisis du jour and finish this dang book. Thanks to everyone for your patience and support. There’s a certain rightness in having this second edition come out almost exactly ten years to the day after the first edition.

OpenBSD is an interrelated whole, and every command has ties to other commands. In an ideal world, you would read every man page and be able to hold an integrated image of the system in your head. Because most of us can’t do this, this section directs you to related man pages. org/ and its various online mirrors. One of the interesting things about the web-based man pages is that you can look at them for both previous releases and for other architectures. Do you want to know if there’s a difference between the sysctl command for i386 and Loongson hardware?

Oddly enough, the lawsuit promoted BSD to thousands of people who never would have heard of it otherwise, spawning open source BSD variants such as 386BSD, FreeBSD, and NetBSD. xxxii Introduction In 1994, after two years of legal wrangling, the University of California lawyers proved that the majority of AT&T UNIX was actually taken from BSD, rather than the other way around. To add insult to injury, AT&T had violated the BSD license by stripping the CSRG copyright from the files it had appropriated Only about a half-dozen files remained as the source of contention.

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