《Linux Shell脚本攻略》通过细致剖析实际应用中的110多个案例，使许多看似复杂的Linux shell脚本任务迎刃而解。《Linux Shell脚本攻略》会帮助读者利用少量命令的组合完成诸如文本处理、文件管理、备份等复杂的数据管理工作。它将告诉你如何利用shell命令快速开发常规任务，综合应用grep、find、sed和awk等常用命令，凭借短短几个命令行从Web挖掘数据的shell脚本，利用归档工具运行并自动化各种任务，诸如自动备份和存储；帮助你理解文件系统、文件类型以及文件管理；用shell创建以及维护文件或目录归档、压缩格式和加密技术；通过srlell脚本设置以太网和无线LAN；使用登录技术监控网络上的各种动态。

《Linux Shell脚本攻略》通过细致剖析实际应用中的110多个案例，使许多看似复杂的Linux shell脚本任务迎刃而解。《Linux Shell脚本攻略》会帮助读者利用少量命令的组合完成诸如文本处理、文件管理、备份等复杂的数据管理工作。它将告诉你如何利用shell命令快速开发常规任务，综合应用grep、find、sed和awk等常用命令，凭借短短几个命令行从Web挖掘数据的shell脚本，利用归档工具运行并自动化各种任务，诸如自动备份和存储；帮助你理解文件系统、文件类型以及文件管理；用shell创建以及维护文件或目录归档、压缩格式和加密技术；通过srlell脚本设置以太网和无线LAN；使用登录技术监控网络上的各种动态。

This refreshed edition serves as the most valuable guide yet to the bash shell. It's full of practical examples of shell commands and programs guaranteed to make everyday use of Linux that much easier. Includes information on key bindings, command line editing and processing, integrated programming features, signal handling, and much more! 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

This refreshed edition serves as the most valuable guide yet to the bash shell. It's full of practical examples of shell commands and programs guaranteed to make everyday use of Linux that much easier. Includes information on key bindings, command line editing and processing, integrated programming features, signal handling, and much more! 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

本书在一开始就给出一个概述和指南，论述了从grep到sed再到awk不断改进的功能。sed和awk具有相同的命令行语法，以脚本的形式接收用户的命令。因为所有这三个程序都使用UNIX正则表达式，因此书中用一章的篇幅来介绍UNIX的正则表达式语法。 然后，本书介绍如何编写sed脚本。从编写几行简单的脚本开始，学习进行手工编辑操作的其他基本命令和高级命令，以及由此引入的简单程序结构。这些高级命令包括用于处理保持空间、即一个等量齐观时缓冲区的命令。

《Shell脚本学习指南》将告诉你这些有关UNIX主流工具的知识。除此之外，《Shell脚本学习指南》还会帮助你解决UNIX命令与标准的差异。 作者熟知UNIx程序使用的基本技巧与操作上细微的差异。他们不但会告诉你如何构建一个绝佳的脚本，还会教你如何避免落入让你功亏一篑的陷阱。有了《Shell脚本学习指南》，你可以节省很多力气。 我们要学习的不只是如何写出有用的Shell脚本，你还得了解如何迅速、确实地定制Shell，让程序的可移植性达到最佳状态，脱离对特定系统的依赖。这些技巧对任何操作与维护UNIX及Linux系统的人而言都很重要。《Shell脚本学习指南》所提供的知识，将可以帮助你掌握基本的Shell脚本编写技巧。Shell脚本编程(scripting)的技巧永远不会过时：它们可以让UNIX充分发挥其真实的潜能。对uNIx的用户与系统管理者而言，编写shell脚本是必须的工作，它可以让你快速地控制与定制任何UNIX系统的强大功能。有了Shell脚本，你可以结合基本的UNIX文本与文件处理命令来消化数据，以及自动化重复的工作。一旦你对Shell脚本的编写掌控自如，在接下来的几年，这些技巧将对你相当有帮助。 编写shell脚本所需要的不只是对shell语言的认识，还必须熟知单个的uNIx程序：你必须知道每个程序为什么会放在那儿，以及如何使用该程序或如何将其与其他程序结合。