Learning the bash Shell, 2nd Edition

O'Reilly's bestselling book on Linux's bash shell is at it again. Now that Linux is an established player both as a server and on the desktop Learning the bash Shell has been updated and refreshed to account for all the latest changes. Indeed, this third edition serves as the most valuable guide yet to the bash shell. As any good programmer knows, the first thing users of the Linux operating system come face to face with is the shell the UNIX term for a user interface to the system. In other words, it's what lets you communicate with the computer via the keyboard and display. Mastering the bash shell might sound fairly simple but it isn't. In truth, there are many complexities that need careful explanation, which is just what Learning the bash Shell provides. If you are new to shell programming, the book provides an excellent introduction, covering everything from the most basic to the most advanced features. And if you've been writing shell scripts for years, it offers a great way to find out what the new shell offers. Learning the bash Shell is also full of practical examples of shell commands and programs that will make everyday use of Linux that much easier. With this book, programmers will learn: How to install bash as your login shell The basics of interactive shell use, including UNIX file and directory structures, standard I/O, and background jobs Command line editing, history substitution, and key bindings How to customize your shell environment without programming The nuts and bolts of basic shell programming, flow control structures, command-line options and typed variables Process handling, from job control to processes, coroutines and subshells Debugging techniques, such as trace and verbose modes Techniques for implementing system-wide shell customization and features related to system security Learning the bash Shell, Third Edition, is the definitive guide to bash, the Free Software Foundation's "Bourne Again Shell." It's a freely available replacement for the UNIX Bourne shell, and is the shell of choice for users of Linux, Mac OS X, BSD, and other UNIX systems.

You'll find this guide valuable whether you're interested in bash as a user interface or for its powerful programming capabilities. This book will teach you how to use bash's advanced command-line features, such as command history, command-line editing, and command completion.

This book also introduces shell programming, a skill no UNIX or Linux user should be without. The book demonstrates what you can do with bash's programming features. You'll learn about flow control, signal handling, and command-line processing and I/O. There is also a chapter on debugging your bash programs. Finally, Learning the bash Shell, Third Edition, shows you how to acquire, install, configure, and customize bash, and gives advice to system administrators managing bash for their user communities.

This Third Edition covers all of the features of bash Version 3.0, while still applying to Versions 1.x and 2.x. It includes a debugger for the bash shell, both as an extended example and as a useful piece of working code. Since shell scripts are a significant part of many software projects, the book also discusses how to write maintainable shell scripts. And, of course, it discusses the many features that have been introduced to bash over the years: one-dimensional arrays, parameter expansion, pattern-matching operations, new commands, and security improvements. Unfailingly practical and packed with examples and questions for future study, Learning the bash Shell, Third Edition, is a valuable asset for Linux and other UNIX users.

This is the definitive guide to the "Bourne Again Shell" (bash). Bash is a modern general purpose UNIX and LINUX shell that incorporates elements of the C and Korn shells. It covers the new commands and features of bash version 2.0, and emphasizes POSIX compliance in POSIX 2.0 mode. This publication is designed for those who have just starting shell programming. The authors guide you from bash installation and command line editing through customization, flow control, process handling and debugging. Along the way, you learn about shell scripts, I/O and command line processing, positional parameters, properties and shell administration. The new features for bash v2.0 are command line editing, bindings, arrays, dynamic loading and integrated programming.

Learning the bash Shell, Third Edition, is the definitive guide to bash, the Free Software Foundation's "Bourne Again Shell." It's a freely available replacement for the UNIX Bourne shell, and is the shell of choice for users of Linux, Mac OS X, BSD, and other UNIX systems. You'll find this guide valuable whether you're interested in bash as a user interface or for its powerful programming capabilities. This book will teach you how to use bash's advanced command-line features, such as command history, command-line editing, and command completion. This book also introduces shell programming,a skill no UNIX or Linus user should be without. The book demonstrates what you can do with bash's programming features. You'll learn about flow control, signal handling, and command-line processing and I/O. There is also a chapter on debugging your bash programs. Finally, Learning the bash Shell, Third Edition, shows you how to acquire, install, configure, and customize bash, and gives advice to system administrators managing bash for their user communities. This Third Edition covers all of the features of bash Version 3.0, while still applying to Versions 1.x and 2.x. It includes a debugger for the bash shell, both as an extended example and as a useful piece of working code. Since shell scripts are a significant part of many software projects, the book also discusses how to write maintainable shell scripts. And, of course, it discusses the many features that have been introduced to bash over the years: one-dimensional arrays, parameter expansion, pattern-matching operations, new commands, and security improvements. Unfailingly practical and packed with examples and questions for future study, Learning the bash Shell Third Edition is a valuable asset for Linux and other UNIX users. --back cover "Learning the bash Shell, Second Edition, is the definitive guide to bash, the Free Software Foundation's "Bourne Again Shell." It's a freely available replacement for the popular UNIX Bourne shell, and is also the shell of choice for Linux users around the world." "You'll find this guide valuable whether you're interested in bash as a user interface or for its powerful programming capabilities. It will teach you how to use bash's advanced command-line features, like command history, command-line editing, and command completion." "This book also introduces shell programming, a skill no UNIX or Linux user should be without. The book demonstrates what you can do with bash's programming features. You'll learn about flow control, signal handling, and command-line processing and I/O. There is also a chapter on debugging your bash programs." "Finally, Learning the bash Shell, Second Edition, shows you how to acquire, install, configure, and customize bash, and gives advice to system administrators managing bash for their user community."--Jacket The 2nd edition of "Learning the Bash Shell" is backwards compatible with version 1.X but now covers version 2.0 and offers a sensible path for those wishing to update their programming skills with the version.