Book Image

Mastering PowerShell Scripting - Fourth Edition

By : Chris Dent
5 (1)
Book Image

Mastering PowerShell Scripting - Fourth Edition

5 (1)
By: Chris Dent

Overview of this book

PowerShell scripts offer a convenient way to automate various tasks, but working with them can be daunting. Mastering PowerShell Scripting takes away the fear and helps you navigate through PowerShell's capabilities.This extensively revised edition includes new chapters on debugging and troubleshooting and creating GUIs (online chapter). Learn the new features of PowerShell 7.1 by working with parameters, objects, and .NET classes from within PowerShell 7.1. This comprehensive guide starts with the basics before moving on to advanced topics, including asynchronous processing, desired state configuration, using more complex scripts and filters, debugging issues, and error-handling techniques. Explore how to efficiently manage substantial amounts of data and interact with other services using PowerShell 7.1. This book will help you to make the most of PowerShell's automation features, using different methods to parse data, manipulate regular expressions, and work with Windows Management Instrumentation (WMI).
Table of Contents (26 chapters)
24
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25
Index

Redirection operators

Chapter 3, Working with Objects in PowerShell, started exploring the different output streams PowerShell utilizes.

Information from a command may be redirected using the redirection operator, >. Information may be sent to another stream or a file.

For example, the output from a command can be directed to a file. The file contains the output as it would have been displayed in the console:

PS> Get-Process -Id $pid > process.txt
PS> Get-Content process.txt 
NPM(K)    PM(M)      WS(M)     CPU(s)      Id  SI ProcessName
 ------    -----      -----     ------      --  -- -----------
     78   144.69     186.91      12.69   15284   1 pwsh 

Each of the streams in PowerShell has a number associated with it. These are shown in the following table:

Stream name

Stream number

Standard...