Arnold Robbins – författare

It's simple: if you want to interact deeply with Mac OS X, Linux, and other Unix-like systems, you need to know how to work with the Bash shell. This concise little book puts all of the essential information about Bash right at your fingertips. You'll quickly find answers to the annoying questions that generally come up when you're writing shell scripts: What characters do you need to quote? How do you get variable substitution to do exactly what you want? How do you use arrays? Updated for Bash version 4.4, this book has the answers to these and other problems in a format that makes browsing quick and easy. Topics include: Invoking the shell Syntax Functions and variables Arithmetic expressions Command history Programmable completion Job control Shell options Command execution Coprocesses Restricted shells Built-in commands

Unlock the secrets of Linux system programming and take your coding skills to the next level

Do you use Linux, but not really understand it? Have you ever wondered how ls -l knows everything it does? Could you explain to a coworker why ls and find can be external commands but cd and umask must be built into the shell?

The answers to these questions, and more, are in Linux Application Development by Example, Second Edition! This book tells you exactly what you need to know--no more and no less--about the fundamental Linux system programming APIs.

Following the latest POSIX standard, author Arnold Robbins explains how the basic file, process, IPC and networking APIs work. When possible, he demonstrates the use of the APIs with code drawn from real programs (V7 Unix, BSD Unix, and GNU), and when that's not possible, he provides small, clearly documented and annotated, standalone example programs of his own. All code presented in the book is available for download, so you can compile, run, and modify the programs yourself.

Robbins focuses on both high-level principles and "under the hood" techniques. Along the way, he carefully addresses real-world issues like performance, portability, and robustness.

Each chapter closes with exercises, ranging from coding problems to thought experiments, to help you cement your understanding of the material covered, and all chapters have been thoroughly revised and updated for this edition, along with two chapters new in this edition.

Memory management File I/O File metadata Processes, Users and groups Sorting and searching Argument parsing Extended interfaces Signals Internationalization Basic Networking Debugging And more!

Just learning to program? Switching from Windows or macOS? Already developing with Linux but interested in exploring the system call interface further? No matter which, quickly and directly, this book will help you master the fundamentals needed to build serious Linux software.

"It's rare that I read a programming book and find myself enjoying it. I enjoyed going through this manuscript, to the point where I would be surprised that a couple hours would go by while I was absorbed in the topics.... It deserves to sit on my shelf alongside other classics."--Matthew Helmke, Linux author and consultant

With a Foreword by Chet Ramey, maintainer of the Bash shell

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This is a reference guide to the information presented in the larger volumes. It presents a concise summary of regular expressions and pattern matching, and summaries of Sed and Awk. This edition has expanded coverage of Gawk (GNU Awk), and includes sections on: an overview of Sed and Awk's command line syntax; alphabetical summaries of commands, including Nawk and Gawk; profiling with PGawk; coprocesses and sockets with Gawk; internationalization with Gawk; and a listing of resources for Sed and Awk users.

Shell scripting skills never go out of style. It's the shell that unlocks the real potential of Unix. Shell scripting is essential for Unix users and system administrators-a way to quickly harness and customize the full power of any Unix system. With shell scripts, you can combine the fundamental Unix text and file processing commands to crunch data and automate repetitive tasks. But beneath this simple promise lies a treacherous ocean of variations in Unix commands and standards. Classic Shell Scripting is written to help you reliably navigate these tricky waters. Writing shell scripts requires more than just a knowledge of the shell language, it also requires familiarity with the individual Unix programs: why each one is there, how to use them by themselves, and in combination with the other programs. The authors are intimately familiar with the tips and tricks that can be used to create excellent scripts, as well as the traps that can make your best effort a bad shell script. With Classic Shell Scripting you'll avoid hours of wasted effort. You'll learn not only write useful shell scripts, but how to do it properly and portably.The ability to program and customize the shell quickly, reliably, and portably to get the best out of any individual system is an important skill for anyone operating and maintaining Unix or Linux systems. Classic Shell Scripting gives you everything you need to master these essential skills.

Many Linux and Unix developers are familiar with the GNU debugger (GBD), the invaluable open source tool for testing, fixing, and retesting software. And since GDB can be ported to Windows, Microsoft developers and others who use this platform can also take advantage of this amazing free software that allows you to see exactly what's going on inside of a program as it's executing. This new pocket guide gives you a convenient quick reference for using the debugger with several different programming languages, including C, C++, Java, Fortran and Assembly. The GNU debugger is the most useful tool during the testing phase of the software development cycle because it helps you catch bugs in the act. You can see what a program was doing at the moment it crashed, and then readily pinpoint and correct problem code. With the GDB Pocket Reference on hand, the process is quick and painless. The book covers the essentials of using GBD is a testing environment, including how to specify a target for debugging and how to make a program stop on specified conditions.This handy guide also provides details on using the debugger to examine the stack, source files and data to find the cause of program failure-and then explains ways to use GBD to make quick changes to the program for further testing and debugging. The ability to spot a bug in real time with GDB can save you hours of frustration, and having a quick way to refer to GBD's essential functions is key to making the process work. Once you get your hands on the GDB Pocket Reference, you'll never let go!

As an open operating system, Unix can be improved on by anyone and everyone: individuals, companies, universities, and more. As a result, the very nature of Unix has been altered over the years by numerous extensions formulated in an assortment of versions. Today, Unix encompasses everything from Sun's Solaris to Apple's Mac OS X and more varieties of Linux than you can easily name. The latest edition of this bestselling reference brings Unix into the 21st century. It's been reworked to keep current with the broader state of Unix in today's world and highlight the strengths of this operating system in all its various flavors. Detailing all Unix commands and options, the informative guide provides generous descriptions and examples that put those commands in context.Here are some of the new features you'll find in Unix in a Nutshell, Fourth Edition: * Solaris 10, the latest version of the SVR4-based operating system, GNU/Linux, and Mac OS X * Bash shell (along with the 1988 and 1993 versions of ksh) * tsch shell (instead of the original Berkeley csh) * Package management programs, used for program installation on popular GNU/Linux systems, Solaris and Mac OS X * GNU Emacs Version 21 * Introduction to source code management systems * Concurrent versions system * Subversion version control system * GDB debugger As Unix has progressed, certain commands that were once critical have fallen into disuse. To that end, the book has also dropped material that is no longer relevant, keeping it taut and current. If you're a Unix user or programmer, you'll recognize the value of this complete, up-to-date Unix reference. With chapter overviews, specific examples, and detailed command.

vi and Vim are immensely powerful tools for anyone working with Unix, Linux, or Mac OS X, but there are far too many commands for anyone to remember. Author Arnold Robbins (vi and Vim Editors in a Nutshell) has chosen the most important and valuable commands for vi, Vim, and their main clones -- vile, elvis, and nvi -- and packed them into this convenient pocket reference. Fully updated and with greatly expanded Vim coverage, this handy little book puts all of the essential information about vi and Vim at your fingertips, in a format that makes browsing easy. You'll find commands to help you program, fix important system files, work on articles and other texts that use mark-up, and do any other kind of text editing. vi and Vim Editors Pocket Reference includes: * Command-line options * Command mode commands * Ex commands and options * Regular expressions * Other pertinent information for using vi and Vim * Additional features in vile, elvis, and nvi

When processing text files, the awk language is ideal for handling data extraction, reporting, and data-reformatting jobs. This practical guide serves as both a reference and tutorial for POSIX-standard awk and for the GNU implementation, called gawk. This book is useful for novices and awk experts alike. In this thoroughly revised edition, author and gawk lead developer Arnold Robbins describes the awk language and gawk program in detail, shows you how to use awk and gawk for problem solving, and then dives into specific features of gawk. System administrators, programmers, webmasters, and other power users will find everything they need to know about awk and gawk. You will learn how to: Format text and use regular expressions in awk and gawk Process data using awk's operators and built-in functions Manage data relationships using associative arrays Define your own functions "Think in awk" with two full chapters of sample functions and programs Take advantage of gawk's many advanced features Debug awk programs with the gawk built-in debugger Extend gawk by writing new functions in C or C++ This book is published under the terms of the GNU Free Documentation License.You have the freedom to copy and modify this GNU manual. Royalties from the sales of this book go to the Free Software Foundation and to the author.