掌握企业级Bash脚本：解锁Linux shell编程力量

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"《Mastering Linux Shell Scripting》是一本专为Linux用户设计的权威指南，它深入浅出地讲解了在Linux系统中使用shell脚本编程的各个方面。作者Andrew Mallett针对Bash shell编程的复杂性，提供了全面且实用的教程，帮助读者掌握从基础到高级的技能。本书首先引导读者了解如何创建和运行简单的脚本，包括在正常模式和调试模式下操作。通过学习各种条件语句和代码片段，读者能够轻松处理文本处理和系统管理任务中的自动化需求。章节中还着重讲解了循环和重复在脚本中的应用，使读者能高效地解决问题。除了基本的Bash Shell，书中还涉及到了Stream Editor（sed、awk等）在编辑文件中的运用，以及Perl和Python这两种强大的编程语言在shell脚本中的结合。此外，作者并未止步于此，还涵盖了其他脚本语言的选择和使用，确保读者能根据项目的具体需求，灵活选择最适合的工具。版权方面，这本书受2015年Packt Publishing出版，所有内容未经书面许可，不得复制、存储或传播。尽管作者和出版社努力保证信息的准确性，但书中的信息不提供任何形式的保证，也不承担因使用本书内容而产生的直接或间接损失的责任。同时，Packt Publishing在提及商标时尽力做到规范，但不能保证所有信息的准确性。《Mastering Linux Shell Scripting》是一本实用的参考书籍，无论你是初学者还是经验丰富的系统管理员，都能从中提升shell编程技巧，进一步增强在企业环境中利用Linux的强大能力。通过学习本书，你将能解锁shell的无穷潜力，并为你的项目开发带来高效和便捷。"

Preface

[ ix ]

What you need for this book

Using any Linux distribution with the bash shell should be sufcient to complete

this book. In the book we use examples that are produced using the Raspbian

distribution on a Raspberry Pi; however, Linux distribution should be sufcient. If

you have access to the command line in OS X on Apple systems, then you should be

able to carry out most of the exercises without Linux.

Who this book is for

Mastering Linux Shell Scripting has been written for Linux administrators who want

to automate tasks in their daily lives, saving time and effort. You need to have

command-line experience and be familiar with the tasks that you need to automate.

A basic knowledge of scripting is expected.

Conventions

In this book, you will nd a number of text styles that distinguish between different

kinds of information. Here are some examples of these styles and an explanation of

their meaning.

Code words in text, database table names, folder names, lenames, le extensions,

pathnames, dummy URLs, user input, and Twitter handles are shown as follows:

"We again see that the basename is evaluated rst, but we do not see the more

detailed steps involved in running that command."

A block of code is set as follows:

#!/bin/bash

echo "You are using $0"

echo "Hello $*"

exit 0

When we wish to draw your attention to a particular part of a code block,

the relevant lines or items are set in bold:

#!/bin/bash

echo "You are using $0"

echo "Hello $*"

exit 0

www.it-ebooks.info

Preface

[ xi ]

Downloading the color images of this book

We also provide you with a PDF le that has color images of the screenshots/

diagrams used in this book. The color images will help you better understand the

changes in the output. You can download this le from: http://www.packtpub.

com/sites/default/files/downloads/MasteringLinuxShellScripting_

ColorImages.pdf.

Errata

Although we have taken every care to ensure the accuracy of our content, mistakes

do happen. If you nd a mistake in one of our books—maybe a mistake in the text or

the code—we would be grateful if you could report this to us. By doing so, you can

save other readers from frustration and help us improve subsequent versions of this

book. If you nd any errata, please report them by visiting http://www.packtpub.

com/submit-errata, selecting your book, clicking on the Errata Submission Form

link, and entering the details of your errata. Once your errata are veried, your

submission will be accepted and the errata will be uploaded to our website or

added to any list of existing errata under the Errata section of that title.

To view the previously submitted errata, go to https://www.packtpub.com/books/

content/support and enter the name of the book in the search eld. The required

information will appear under the Errata section.

Piracy

Piracy of copyrighted material on the Internet is an ongoing problem across all

media. At Packt, we take the protection of our copyright and licenses very seriously.

If you come across any illegal copies of our works in any form on the Internet, please

provide us with the location address or website name immediately so that we can

pursue a remedy.

Please contact us at copyright@packtpub.com with a link to the suspected

pirated material.

We appreciate your help in protecting our authors and our ability to bring you

valuable content.

Questions

If you have a problem with any aspect of this book, you can contact us at

questions@packtpub.com, and we will do our best to address the problem.

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掌握企业级Bash脚本：解锁Linux shell编程力量

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