Beginning Portable Shell Scripting: From Novice to Professional (Expert's Voice in Open Source)

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Portable shell scripting is the future of modern Linux, OS X, and Unix command?line access. Beginning Portable Shell Scripting: From Novice to Professional teaches shell scripting by using the common core of most shells and expands those principles to all of scripting. You will learn about portable scripting and how to use the same syntax and design principles for all shells. You?ll discover about the interaction between shells and other scriptinglanguages like Ruby and Python, and everything you learn will be shown in context for Linux, OS X, bash, and AppleScript. What you?ll learnThis book will prime you on not just shell scripting, but also the modern context of portable shell scripting. You will learn The core Linux/OS X shell constructs from a portability point of view How to write scripts that write other scripts, and how to write macros and debug them How to write and design shell script portably from the ground up How to use programmable utilities and their inherent portability to your advantage, while pinpointing potential traps Pulling everything together, how to engineer scripts that play well with Python and Ruby, and even run on embedded systems Who this book is for This book is for system administrators, programmers, and testers working across Linux, OS X, and the Unix command line. Table of Contents Introduction to Shell Scripting Patterns and Regular Expressions Basic Shell Scripting Core Shell Features Explained Shells Within Shells Invocation and Execution Shell Language Portability Utility Portability Bringing It All Together Shell Script Design Mixing and Matching

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Peter Seebach has been using Unix since he needed to sit on a phone book to reach the keyboard. He's been writing professionally about Unix for mass audiences since the last millennium. He is currently employed as a senior software engineer at Wind River Systems and continues to write prolifically on a freelance basis.