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

Summary


In this chapter, we have taken a look at regular expressions and their use in PowerShell.

The Regex basics section introduce a number of heavily used characters. Anchors showing how the start and end of a string or a word boundary may be used to restrict the scope of an expression.

Character classes were introduced as a powerful form of alternation, providing a range of options for matching a single character. Alternation was demonstrated using different sets of expressions to be evaluated.

We looked at repetition using "*", +, ?, and curly braces and discussed the notion of greedy and lazy.

Grouping was introduced as a means of limiting the scope of alternation to repeat larger expressions or to capture strings.

Finally, a number of examples were included, bringing together the areas covered in this chapter to solve specific problems.

In Chapter 11, Files, Folders and the Registry, working with files, folders, and registry will be discussed.