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bash Cookbook: Solutions and Examples for bash Users

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Every modern operating system has at least one shell and some have many. Some shells are command-line oriented, such as the shell discussed in this book. Others are graphical, like Windows Explorer or the Macintosh Finder. Some users will interact with the shell only long enough to launch their favorite application, and then never emerge from that until they log off. But most users spend a significant amount of time using the shell. The more you know about your shell, the faster and more productive you can be.

Whether you are a system administrator, a programmer, or an end user, there are certainly occasions where a simple (or perhaps not so simple) shell script can save you time and effort, or facilitate consistency and repeatability for some important task. Even using an alias to change or shorten the name of a command you use often can have a significant effect. We’ll cover this and much more.

As with any general programming language, there is more than one way to do a given task. In some cases, there is only one best way, but in most cases there are at least two or three equally effective and efficient ways to write a solution. Which way you choose depends on your personal style, creativity, and familiarity with different commands and techniques. This is as true for us as authors as it is for you as the reader. In most cases we will choose a single method and implement it. In a few cases we may choose a particular method and explain why we think it’s the best. We may also occasionally show more than one equivalent solution so you can choose the one that best fits your needs and environment.

There is also sometimes a choice between a clever way to write some code, and a readable way. We will choose the readable way every time because experience has taught us that no matter how transparent you think your clever code is now, six or eighteen months and 10 projects from now, you will be scratching your head asking yourself what you were thinking. Trust us, write clear code, and document it—you’ll thank yourself (and us) later.

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Streetsmart Financial Basics for Nonprofit Managers
Streetsmart Financial Basics for Nonprofit Managers

Praise for Streetsmart Financial Basics for Nonprofit Managers, Third Edition

"Tom McLaughlin is a proven master at making the daunting concepts of nonprofit financial management clear and engaging. This book is a superb introduction for new nonprofit executives, board members, and students. It is also an...

Adobe InDesign CS2 Official JavaScript Reference
Adobe InDesign CS2 Official JavaScript Reference
Do you spend too much time doing repetitive production tasks such as placing and replacing images, correcting errors in text, cutting and pasting, and preparing files for printing, instead of being creative? Do you use Adobe InDesign CS2 and have a strong working knowledge of JavaScript? Then you're in luck. Since Adobe Creative Suite 2 was...
The Digital Photographer's Software Guide
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"The Digital Photographer's Software Guide" is your comprehensive guide to the full range of photographic software and plug-ins available to assist in digital photography editing and output. Written for digital photography enthusiasts of all levels, from the novice to the serious hobbyist, and to accommodate any budget, the book...


MATLAB Linear Algebra
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MATLAB is a high-level language and environment for numerical computation, visualization, and programming. Using MATLAB, you can analyze data, develop algorithms, and create models and applications. The language, tools, and built-in math functions enable you to explore multiple approaches and reach a solution faster than with spreadsheets or...

A Computational Model of Natural Language Communication: Interpretation, Inference, and Production in Database Semantics
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Everyday life would be easier if we could simply talk with machines instead of having to program them. Before such talking robots can be built, however, there must be a theory of how communicating with natural language works. This requires not only a grammatical analysis of the language signs, but also a model of the cognitive agent, with...
Computer Network Time Synchronization: The Network Time Protocol on Earth and in Space, Second Edition
Computer Network Time Synchronization: The Network Time Protocol on Earth and in Space, Second Edition

This book is all about wrangling a herd of network computers so that all display the correct time. This may seem like a really narrow business, but the issues go far beyond winding the clock on your display taskbar. Carefully coordinated, reliable, and accurate time is vital for traffic control in the air and on the ground, buying and...

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