Download How Linux Works: What Every Superuser Should Know (2nd by Brian Ward PDF

By Brian Ward

Filenote: sourced from ebrary as requested for on request as a result of one already upped no longer being the top of the range imprint

How Linux Works unearths the interior workings of the Linux process, with in-depth assurance of themes resembling equipment administration, the boot series, process administration fundamentals, and networking. writer Brian Ward combines history idea and real-world examples to teach you either "how" to manage Linux and "why" each one procedure works. This up to date variation of the vintage Linux reference explores the kernel in higher aspect, with insurance of approach calls, enter and output, and dossier systems.

With this crucial consultant, you'll examine every little thing you want to recognize to customise your method, remedy difficulties, and make your desktop be just right for you.

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Extra info for How Linux Works: What Every Superuser Should Know (2nd Edition)

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For example, the source of an input stream can be a file, a device, a terminal, or even the output stream from another process. To see an input stream at work, enter cat (with no filenames) and press enter. This time, you won’t get your shell prompt back because cat is still running. Now type anything and press enter at the end of each line. The cat command repeats any line that you type. Once you’re sufficiently bored, press ctrl -D on an empty line to terminate cat and return to the shell prompt.

The program tried to access a part of memory that it was not allowed to touch, and the operating system killed it. Similarly, a bus error means that the program tried to access some memory in a particular way that it shouldn’t. When you get one of these errors, you might be giving a program some input that it did not expect. 16 Listing and Manipulating Processes Recall from Chapter 1 that a process is a running program. Each process on the system has a numeric process ID (PID). For a quick listing of running processes, just run ps on the command line.

Isn’t this a book about how Linux works? It is, of course, but Linux is a Unix flavor at heart. You’ll see the word Unix in this chapter more than Linux because you can take what you learn straight over to Solaris, BSD, and other Unix-flavored systems. I’ve attempted to avoid covering too many Linux-specific user interface extensions, not only to give you a better background for using the other operating systems, but also because these extensions tend to be unstable. You’ll be able to adapt to new Linux releases much more quickly if you know the core commands.

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