Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By : Brenton J.W. Blawat
Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By: Brenton J.W. Blawat

Overview of this book

PowerShell scripts offer a handy way to automate various chores. Working with these scripts effectively can be a difficult task. This comprehensive guide starts from scratch and covers advanced-level topics to make you a PowerShell expert. The first module, PowerShell Fundamentals, begins with new features, installing PowerShell on Linux, working with parameters and objects, and also how you can work with .NET classes from within PowerShell. In the next module, you’ll see how to efficiently manage large amounts of data and interact with other services using PowerShell. You’ll be able to make the most of PowerShell’s powerful automation feature, where you will have different methods to parse and manipulate data, regular expressions, and WMI. After automation, you will enter the Extending PowerShell module, which covers topics such as asynchronous processing and, creating modules. The final step is to secure your PowerShell, so you will land in the last module, Securing and Debugging PowerShell, which covers PowerShell execution policies, error handling techniques, and testing. By the end of the book, you will be an expert in using the PowerShell language.
Table of Contents (24 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

XML


eXtensible Markup Language (XML), is a plain text format used to store structured data. XML is written to be both human and machine readable.

XML documents often begin with a declaration, as shown here:

<?xml version="1.0"?>

The declaration has three possible attributes. The version attribute is mandatory when a declaration is included:

  • version: The XML version, 1.0 or 1.1
  • encoding: The file encoding, most frequently utf-8 or utf-16
  • standalone: Whether or not the XML file uses an internal or external Document Type Definition (DTD), permissible values are yes or no

Elements and attributes

XML is similar in appearance to HTML. Elements begin and end with a tag name. The tag name describes the name of an element. For example:

<?xml version="1.0"?> 
<rootElement>value</rootElement>

An XML document can only have one root element, but an element may have many descendants:

<?xml version="1.0"?> 
<rootElement> 
<firstChild>1</firstChild> 
<secondChild...