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How Linux Works, 2nd Edition: What Every Superuser Should Know

Download Ebook How Linux Works, 2nd Edition: What Every Superuser Should Know

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About the Author

Brian Ward has been working with Linux since 1993. He is the author of The Linux Kernel-HOWTO, The Book of VMware (No Starch Press), and The Linux Problem Solver (No Starch Press).

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Product details

Paperback: 392 pages

Publisher: No Starch Press; Second edition (November 14, 2014)

Language: English

ISBN-10: 1593275676

ISBN-13: 978-1593275679

Product Dimensions:

7.1 x 0.9 x 9.4 inches

Shipping Weight: 1.6 pounds (View shipping rates and policies)

Average Customer Review:

4.7 out of 5 stars

195 customer reviews

Amazon Best Sellers Rank:

#14,173 in Books (See Top 100 in Books)

I've read reviews all over the web of Brian's new edition, and I'm frankly confused. The range of opinions go from "This is very basic, don't bother if you're advanced" to "Don't bother if you're a beginner, way too much detail on the inner workings than you need." 3 bears? Just right for... who? Part of the problem might be the subtitle: "What every superuser should know." In Brian's usual dry sense of humor, this refers to the $ vs. # prompt difference between user and "superuser" (kernel access) at the command prompt. It does NOT mean (goodness no) that you have to be some kind of superuser in the programming sense to understand or greatly enjoy this book.In one fell swoop Ward does a number of things with the specialized term in unix/linux (superuser is simply what Windows folk would call a sysop or administrator, or hackers would look at with rootkits/kernels as privilege escalation): 1. Letting casual users know they will be using the command line rather than graphic interface 2. Demonstrating the major update from the first edition: this book is a LOT more about the kernel than the first edition, thankfully so!This is a TOTAL update, so even though I frequently advise going back to a previous edition for unethical publishers and authors that do a cosmetic update and call it a new edition, this is NOT the case here-- Brian has totally reworked the book to bring it up to date with many features Linux was missing (especially in Ubuntu dists) when the first edition was written. This new edition is a MUST, as 10 years has been a lifetime in the Linux world-- frankly the first edition is a paperweight now. And, since this edition includes numerous detailed steps for playing along with your own IDE/SDK throughout as well as complete code on the site, it is now dist independent as much as possible. I've tried the code with Ubuntu, Debian, Fedora and RHEI so far, and found ZERO problems with only teensy adjustments. That is unusual for a newly released title, but not for No Starch, who have technical editors who actually TRY the code, unlike a lot of publishers out there in this field.If you're a beginner, there is no better introduction to operating systems than this book, period. Brian takes the time to explain in painstaking detail the INTUITIVE workings of nearly every o/s-- things you must know to go forward in any kind of programming. In my areas of robotics, embedded and security, many new candidates (some with Masters degrees in IT) flunk the interview because of lack of basic "what's really going on?" answers. These talented candidates know how to program, but when asked very basic questions like "What's the kernel doing here?" or "What does object oriented vs. functional or imperative mean at this level of system call?" their eyes glaze over.This is why, unlike some other reviewers, I strongly advise reading this book for BOTH beginners and advanced programmers. You do not have to have an objective of designing compilers either! Even basic security and hacking, when using tools like IDA Pro, require you to be able to look at the command line and "see" what state the kernel is in, what it is doing and calling, and what certain interrupt/resume sequences really mean regardless of sequential, parallel or virtual memory paradigms. It is not enough to "let the legacy software" (or in the case of sploits, the rootkit) do the work anymore-- even basic scripters are now modifying vm's and rootkits with Python, and the typical sploit, whether pen, hack, forensics or just system admin, involves sophisticated user/kernel interactions by malware that can now not only inject sequences, but also install entire new o/s donuts around your kernel and control the entire o/s!Finally, this book is radically fun if you have any interest in computers, at any level, including high school AND grad school, as well as seasoned practicing programmers. At over 350 pages and extremely up to date, Ward packs each page with SO much information and detailed knowledge, with deeply intuitive examples, that you can either study every sentence numerous times like a text, looking up details in his many external resources, or just read casually and get a "gist" that is rare as an overview of what's really going on between kernel and user abstraction levels (or in the operational sense, interfaces).The information in this book is pertinent for both Geek Squad repair folk and MIT PhD malware designers. I guarantee, as an old professor who teaches Kali Linux to hackers and pen testers at both of these levels, and in assembly reverse engineering detail including memory forensics, that there is something delightful for everyone in this new edition... highly recommended.

Let's face it, if you are mostly a casual computer user doing email and surfing the web, then what operating system you are using is going to matter very little. Linux desktop, MS Windows, Max OS X, and Android are all going to do those tasks pretty much in the same way, and you may not really care about what's under the hood. You can go years using Linux and never see the command line. On the other hand, if you are a technoid as I am, then you are going to be curious about how your operating system works. The net result of this curiosity is gaining an order of magnitude in usability and control over your computer by understanding how it works. I have a number of books about Linux, especially Linux server administration, but none of them make the workings of Linux accessible like this book does. Mr. Ward has put together a wealth of key information about what's going on under the hood and more importantly, how to use it, and done so in easy to understand language.But let me warn you - this is not a book full of dry, passive pages; this is a lively tutorial! Mr. Ward suggests having a Linux system in front of you and trying the various explorations as you go through the book. I cannot recommend that highly enough. I also recommend having a notebook next to you and taking notes. Above all - do not fear the command line. Mr. Ward's explanations and examples are well done. You have no more excuses for not rolling up your sleeves and getting your hands dirty. I think you are going to find that this book becomes the most used of those sitting on your computer bookshelf.Lastly, thanks, Mr. Ward, for writing this book!!

I've worked in software and systems for thirty plus years, and have used multiple flavors of Unix and Linux, both as a developer and user; I've installed and configured pretty much every operating system from MS-DOS to WIndows to OSX to Ubuntu / Red Hat / VxWorks / etc - this book is the resource I wish I had all along. I learned a dozen things in the first two (review) chapters that fundamentally changed my understanding of Linux and how to use it, and I've gained a much more fundamental understanding of operating systems in general. Mr Ward is an outstanding writer who informs and covers the basics without talking down to the reader. He takes pains to point out what material is fundamental and what is provided for depth and can be skimmed or skipped by a casual reader; he also goes to the trouble of identifying other books that can go even deeper should you wish to do so.This book is probably too detailed for a novice linux user, but if you have some understanding as a user and a curiosity about how things work under the hood - do not hesitate. Whatever your focus - application development, system security, hardware configuration and development ... you will learn something useful here. I can't rate this highly enough - one of the best technical books I have read.

PROS: Easy to read and understand, excellent coverage of the ins and outs of Linux.CONS: Just one: The spine of the book is not firmly attached to the pages; mediocre binding.***UPDATE (2/24/16): I decided to update my review because, after buying another book from No Starch Press, I discovered that their books are bound unattached to the spine on purpose. Apparently, this style of binding helps preserve the spine of their books and prevent it from cracking. Since nothing bad happened to my copy of this book (e.g., it didn't fall apart), and it's a good book, I also decided to bump up my rating from 4 to 5 stars.

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