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

The Import-Module command


PowerShell 3 and more will attempt to automatically load modules if a command from that module is used and the module is under one of the paths in the %PSMODULEPATH% environment variable.

For example, if PowerShell is started and the PSDesiredStateConfiguration module is not imported, running the Get-DscResource command will cause the module to be imported. This is shown in the following example:

PS> Get-Module PSDesiredStateConfiguration

PS> Get-DscResource

PS> Get-Module PSDesiredStateConfiguration

ModuleType Version Name                        ExportedCommands
---------- ------- ----                        ---------------- 
Manifest   1.1     PSDesiredStateConfiguration ...

In the previous example, the first time Get-Module is executed, the PSDesiredStateConfiguration module has not yet been loaded. After running Get-DscResource, a command from the PSDesiredStateConfiguration module, the module is loaded and the command is immediately executed. Once...