Book Image

Mastering Windows PowerShell Scripting - Third Edition

By : Chris Dent
Book Image

Mastering Windows PowerShell Scripting - Third Edition

By: Chris Dent

Overview of this book

PowerShell scripts offer a handy way to automate various chores, however working effectively with these scripts can be a difficult task. This comprehensive guide starts with the fundamentals before moving on to advanced-level topics to help you become a PowerShell Core 6.0 expert. The first module, PowerShell Core 6.0 Fundamentals, begins with the new features of PowerShell Core 6.0, installing it on Linux, and working with parameters, objects and .NET classes from within PowerShell Core 6.0. As you make your way through the chapters, you'll see how to efficiently manage large amounts of data and interact with other services using PowerShell Core 6.0. You'll be able to make the most of PowerShell Core 6.0's powerful automation feature, where you will have different methods available to parse data and manipulate regular expressions and Windows Management Instrumentation (WMI). After having explored automation, you will enter the extending PowerShell Core 6.0 module, covering asynchronous processing and desired state configuration. In the last module, you will learn to extend PowerShell Core 6.0 using advanced scripts and filters, and also debug issues along with working on error handling techniques. By the end of this book, you will be an expert in scripting with PowerShell Core 6.0.
Table of Contents (27 chapters)
Free Chapter
1
Section 1: Exploring PowerShell Fundamentals
6
Section 2: Working with Data
16
Section 3: Automating with PowerShell
19
Section 4: Extending PowerShell

Asynchronous Processing

PowerShell prefers to run things synchronously, that is, sequentially, or one after another. However, it is frequently necessary to run many things simultaneously, without waiting for another command to complete. This is known as an asynchronous operation.

Operations of this nature may be local to the current machine, or might be used to run queries or code against remote systems.

PowerShell includes a number of different commands and classes that can be used to do more than one thing at a time. The most obvious of these are the job commands.

In addition to the job commands, PowerShell can react to .NET events, and can use Runspaces and Runspace pools.

This chapter explores the following topics:

  • Working with jobs
  • Reacting to events
  • Using Runspaces and Runspace pools