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Absolute OpenBSD: Unix for the Practical Paranoid par [Lucas, Michael W.]
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Descriptions du produit

Présentation de l'éditeur

The definitive guide to OpenBSD

Foreword by Henning Brauer, OpenBSD PF Developer

OpenBSD, the elegant, highly secure Unix-like operating system, is widely used as the basis for critical DNS servers, routers, firewalls, and more. This long-awaited second edition of Absolute OpenBSD maintains author Michael Lucas's trademark straightforward and practical approach that readers have enjoyed for years. You'll learn the intricacies of the platform, the technical details behind certain design decisions, and best practices, with bits of humor sprinkled throughout. This edition has been completely updated for OpenBSD 5.3, including new coverage of OpenBSD's boot system, security features like W^X and ProPolice, and advanced networking techniques.

You'll learn how to:

  • Manage network traffic with VLANs, trunks, IPv6, and the PF packet filter
  • Make software management quick and effective using the ports and packages system
  • Give users only the access they need with groups, sudo, and chroots
  • Configure OpenBSD's secure implementations of SNMP, DHCP, NTP, hardware sensors, and more
  • Customize the installation and upgrade processes for your network and hardware, or build a custom OpenBSD release

Whether you're a new user looking for a complete introduction to OpenBSD or an experienced sysadmin looking for a refresher, Absolute OpenBSD, 2nd Edition will give you everything you need to master the intricacies of the world's most secure operating system.

"The definitive book on OpenBSD gets a long-overdue refresh."

-Theo de Raadt, OpenBSD Founder


Détails sur le produit

  • Format : Format Kindle
  • Taille du fichier : 1130 KB
  • Nombre de pages de l'édition imprimée : 536 pages
  • Utilisation simultanée de l'appareil : Illimité
  • Editeur : No Starch Press; Édition : 2 (22 avril 2013)
  • Vendu par : Amazon Media EU S.à r.l.
  • Langue : Anglais
  • ASIN: B00CH96VB4
  • Synthèse vocale : Activée
  • X-Ray :
  • Word Wise: Non activé
  • Composition améliorée: Non activé
  • Moyenne des commentaires client : 5.0 étoiles sur 5 2 commentaires client
  • Classement des meilleures ventes d'Amazon: n°289.821 dans la Boutique Kindle (Voir le Top 100 dans la Boutique Kindle)
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Format: Broché Achat vérifié
Ce livre décrit par le menu tout ce qui est utile de connaître sur OpenBsd pour bien débuter. L'auteur a un vrai talent pédagogique et fait régulièrement des remarques humoristiques qui rendent la lecture attrayante.

Progressivement, il vous emmène dans les méandres du système de fichiers unixiens, de manière tout à fait plaisante. Néanmoins, ce n'est pas un livre théorique et vous devez avoir une machine sous OpenBsd qui tourne à côté de vous. Sans ça, point de salut car vous ne pourrez mettre en pratique les conseils et ne comprendrez probablement pas pourquoi on a besoin de cet ouvrage quand on débute.

OpenBSD, OS encore très confidentiel, n'est pas comme Linux. Comme la plupart des BSD "pur race", vous débutez à la fin de l'installation avec un login à taper et hop! vous êtes propulsé dans l'univers de la ligne de commande. Pas d'interface graphique, pas de gadget, pas de souris : juste un curseur qui clignote en guise d'accueil.Ensuite, il faudra monter votre système en fonction de vos besoins, pas à pas, étape par étape. C'est exactement ce que vous apprend cet ouvrage.

Ainsi, si vous avez déjà un système OpenBSD opérationnel, ou que vous venez de FreeBSD ou de NetBSD, vous passerez probablement votre chemin. Tout ce que vous voulez apprendre sur OpenBSD n'est pas dans cet ouvrage qui reste généraliste et tourné vers l'utilisateur débutant.

Si vous venez du monde Linux et souhaitez découvrir un BSD, OpenBSD est peut-être le bon choix. L'ouvrage est alors indispensable.
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Remarque sur ce commentaire 2 personnes ont trouvé cela utile. Avez-vous trouvé ce commentaire utile ? Oui Non Commentaire en cours d'envoi...
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Par Clément J. le 8 décembre 2015
Format: Broché Achat vérifié
à acheter d'urgence si vous aimez ce système, je le connaissais déja bien avant de l'acheter mais j'avais envie d'encourager financièrement l'auteur et le projet. n'hésitez pas une seconde si vous découvrez ou redécouvrez OpenBSD, un must have ;-)
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Commentaires client les plus utiles sur Amazon.com (beta)

Amazon.com: 4.9 étoiles sur 5 31 commentaires
18 internautes sur 18 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 the only openbsd book worth any money 4 mai 2013
Par Anonymous - Publié sur Amazon.com
Format: Broché
Good humor, excellent content.

On my bookshelf I have countless books on Python, C, Perl, you name it ... . But when it comes to BSD I only own two books: Absolute OpenBSD 1st edition and Absolute OpenBSD 2nd edition. This book is really outstanding and takes you from beginner to expert pretty quickly and painlessly. Now although this book is so excellent, I'd like to focus on the areas for improvement because I think people should have some realistic expectations of what's NOT covered.

My main criticism is that it doesn't cover real world interoperability with Windows, etc. I'd love to see some outline of how to integrate an OpenBSD, Windows, Linux, MacOS in a business environment. Specifically I'd love to see coverage of single sign on, integration with Windows shared drives, and using Exchange server for email from OpenBSD.

Another area where I found the book to be a little bit light was, ironically, chapter 10 which covers security. Given that most people coming to OpenBSD have likely become interested in the security aspects of this particular OS, I would have liked to have seen a more technical discussion of the details of the various security techniques. Each of the techniques also have known circumventions. It would have been nice to either mention those pitfalls or at least point to a research paper or two. As an example W^X is mentioned, but there is no mention of return oriented programming.

The final shortcoming in this book is too little time spent showing how to use OpenBSD for email (I feel like OpenSMTPD deserves a chapter), no discussion of webhosting (again, I feel like base apache and/or nginx deserve a chapter), or even using OpenBSD as a database server (obviously postgresql would be covered given the BSD license!) Yes, these are non-traditional uses for OpenBSD as it's strengths are usually on the networking side, but it is a fully capable system and people should see that that's the case.

Overall, if you're looking for a book that covers setup of the various network daemons, or the slight differences of a BSD environment vs a Linux environment for things like disk and/or user management. This is the book for you.

I'd go so far as to say that if you've ever read any of the Stevens networking books and liked them, then Michael Lucas is the Stevens of the BSD world.
13 internautes sur 13 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Your friendly guide in the "foreign land" of OpenBSD 31 mai 2013
Par Jack Woehr - Publié sur Amazon.com
Format: Format Kindle
For many of those who like to install and administer their own computer operating system, OpenBSD is a foreign land. In _Absolute OpenBSD_, Michael Lucas is your friendly hometown guide. If you are a new or recent adopter of OpenBSD, you'll be wasting time if you don't read this book entirely, not only your own time, but also the time of whomever you choose to pester with questions already answered in this book!

OpenBSD focuses on certain principles of system design, primarily simplicity as the foundation of security, reliability and easy administration. While OpenBSD is a distant cousin to Linux as an open source Unix-like operating system, it is determinedly retro: there are, for instance, no Linux-style optionally loadable device drivers in OpenBSD: to add devices, you recompile the OpenBSD monolithic kernel. The approach is minimalist, the community is spartan, and the user must gather his or her own straw for baking the bricks.

I have administered OpenBSD for about 14 years now. Learning all I needed to know in the pre-Lucas era was difficult. The OpenBSD documentation is complete and well organized but initiation into and assimilation of the context of the project, from which all else flows logically, can be, for many reasons which Lucas points out, a long and painful process. Lucas is a most excellent Virgil leading you through the gates and down through the circles of the OpenBSD context.

Lucas has removed a great deal of the pain from adopting OpenBSD. Lucas's style is conversational but to the point. The book is easy to read and to read through thoroughly. At the same time Lucas manages to shovel in a great deal of technical detail which can be reviewed at need. You can indeed learn the whole system, and Lucas proves it to you.

This book is the 2nd edition of Lucas's original masterwork, updated as OpenBSD progresses with the times without losing focus. It is accurate, reasonably complete, and so helpful that I shudder when I remember my own years of struggle when such a volume didn't exist

The Kindle edition contains fewer annoying formatting and typographical errors than usually encountered in the Kindle-ization of a print book. As a reader of many classic books which have become muddied and randomized by lazy publishers simply dumping them into Kindle format, my compliments to No Starch Press for what was obviously a labor of love.

Disclosure: the reviewer was a longtime contributing editor to Dr. Dobb's Journal and was forwarded a Kindle edition of the book by the publisher for unpaid review purposes.
8 internautes sur 8 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Don't run OpenBSD without it 5 mai 2013
Par Stephen Northcutt - Publié sur Amazon.com
Format: Broché
I love paper books so that I can write notes in the margins and bookmark hard to find info, but you may want to consider the Kindle edition in this case. This is a big book and having it searchable would be a big plus; there is just so much info. Also, want to do a shout out to the OpenBSD folks; what a resource. 2nd edition builds on a solid foundation to be a must have if you're running OpenBSD. I had never really thought about the concept of a "successful" installation, but the author's point is spot on that different uses will have different needs, so they invest 66 or so pages helping sysadmins get off to a good start.

Hip hip hooray for the well grounded discussion on sudo and especially the idea of hiding root with sudo. It makes me nervous to see an admin with a "#" prompt.

I have never played with softraid, but with the prices of HW RAID, it is attractive and the writing is so thorough I think I could pull it off.

Great discussion on the network from a systems perspective. Just a bit more on troubleshooting might be a nice touch if there is a 3rd edition. I think all the data is there, but it would be nice to have it as one checklist.

I am not qualified to comment on the packet filtering section and the advanced packet filtering section, SANS would never let me monkey with their perimeter, but while I didn't try any of it, it looks reasonable.

Very clear explanation of the kernel, I got so excited I put the book down for a minute to type "sudo dmesg", been a long time since I did that.
2 internautes sur 2 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 One of the best OS books available 3 juin 2014
Par Ward Hoelscher - Publié sur Amazon.com
Format: Broché Achat vérifié
This book is quite simply one of the finest books for anyone wanting to learn how to get into the basics (and a little bit of the mid-level stuff) of OpenBSD. Each of the BSDs, while coming from the same lineage, have for many years diverged - sometimes dramatically (FreeBSD's recent switch to a new package managing and ports system comes to mind). It's important to have close at hand a recent book with a solid overview of any high-to-mid-level OS functionality, suitable for quick reference, not so much for the "tl;dnr" crowd, but for those who have attempted to RTFM and found a slightly less abstruse approach to information would be helpful from time to time.

Granted, my experience with the BSDs came after about a year of light distro-hopping and settling on Slackware (with a simultaneous soft spot and wary eye on Mint- still can't trust something derived from Ubuntu), so I was already somewhat biased against man pages. Linux, as most users will tell you, has some fairly sloppy and vague documentation in the man pages. Going to the BSDs was a breath of fresh air (Examples? Known Bugs? Yes!) Even so, sometimes one needs that extra human touch. Michael Lucas' "Absolute OpenBSD" is precisely that.

Without this book, it would have taken me considerably longer to figure out how to set up a comfortable single-user environment for a hand-me-down laptop (HP G42 DX515.... don't ask), and certain questions about daemon control, among other things, just would not have occurred to me. This book is an excellent choice for those who are considering one of the BSDs but are not sure which one to use. Those who believe in OpenBSD's reputation as primarily a firewall or server OS would also be well-served by reading this book, which explains the basics of customizing the environment - X11, the shell, and the terrifying hinterland that is /etc.

I strongly recommend this book to anyone considering not only OpenBSD as an OS, but also for those who are looking into the other BSDs as an OS. There are, as I mentioned earlier, substantial differences between the BSDs, but they are reasonably close to each other, and this book allows you to learn more about the BSDs without getting lost in the man pages.
3 internautes sur 3 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 "I’d have no problem with it being another 500 pages" 24 juillet 2014
Par Stefan Pettersson - Publié sur Amazon.com
Format: Broché Achat vérifié
Absolute OpenBSD, second edition by Michael Lucas is a very good book if you are comfortable with other UNIX-like systems and want to learn how to take care of an OpenBSD machine properly. Like it says on the tin.

The book is well produced with a nice layout and few errors, as expected from No Starch. The writing style is simple, to the point and entertaining, as expected from Lucas.

The previous edition was released in 2003 and there have been many changes for the better. Deprecated information on, among other things, using modems to connect to the Internet and how to configure multiboot systems have been removed. The ordering of certain chapters has changed to the better as well. Why treat kernel building before talking about the package system? Of course, there are many new topics in the second edition.

It's a worthy second edition.

Lucas takes great care to explain where OpenBSD comes from and what makes it different from other operating systems. If you only have experience from Ubuntu or SuSE for example, I imagine this introduction will be very valuable. The culture surrounding OpenBSD is quite different. Lucas will help you to understand OpenBSD-people.

OpenBSD is generally a well documented operating system, the documentation is complete and accurate. Unfortunately it is also formal. Lucas makes it more approachable and fills in lots of small blanks.

The real value-adding feature is that he’s quite liberal in sharing his own experiences as a longtime sysadmin. This is the most important feature of the book and I want more. That’s probably the only clear thought when finishing the book: I’d have no problem with it being another 500 pages.

I’ve found one of the most common complaints about running OpenBSD to be the security patching process. (Disregarding the fact that security patches are pretty uncommon on a tight OpenBSD system.) A chapter on good ways to manage the errata patches would be very welcome. How to determine which systems are affected; how to download, patch, compile and install them (this was in the previous edition); and how to distribute them effectively. All this is hidden among the chapters but I would like an explicit treatment.

Also, I miss a description of assembling your own ports and packages. This, also, is somewhat hidden in the descriptions of packages and the ports system but a separate description would be nice.

Both of those topics would, IMHO, be more interesting than all the details of compiling custom kernels. Something that Lucas passionately advises you not to do.

This is the only modern printed text on managing OpenBSD. Thankfully, it’s really good.
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