Book Image

Learn PowerShell Core 6.0

By : David das Neves, Jan-Hendrik Peters
Book Image

Learn PowerShell Core 6.0

By: David das Neves, Jan-Hendrik Peters

Overview of this book

Beginning with an overview of the different versions of PowerShell, Learn PowerShell Core 6.0 introduces you to VSCode and then dives into helping you understand the basic techniques in PowerShell scripting. You will cover advanced coding techniques, learn how to write reusable code as well as store and load data with PowerShell. This book will help you understand PowerShell security and Just Enough Administration, enabling you to create your own PowerShell repository. The last set of chapters will guide you in setting up, configuring, and working with Release Pipelines in VSCode and VSTS, and help you understand PowerShell DSC. In addition to this, you will learn how to use PowerShell with Windows, Azure, Microsoft Online Services, SCCM, and SQL Server. The final chapter will provide you with some use cases and pro tips. By the end of this book, you will be able to create professional reusable code using security insight and knowledge of working with PowerShell Core 6.0 and its most important capabilities.
Table of Contents (26 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

Error handling


Error handling is an important part of scripting. There is nothing worse than a script ruining your infrastructure, just because of one unhandled exception. It is also important to note that PowerShell does not work with integer-based exit codes like other shells do. PowerShell always returns objects, or it returns $null. Through different exceptions, cmdlets communicate any errors that have occurred.

Non-terminating

Exceptions in PowerShell are, by default, non-terminating. This behavior can be overridden per cmdlet or by setting the built-in $ErrorActionPreference variable. All errors that occurr during your session are recorded in the built-in $error variable, which is a list with a capacity of 256 errors.

Terminating errors

Terminating errors can be generated on demand, or by setting the ErrorActionPreference for the entire session to Stop. Terminating errors need to be handled in your code; otherwise, they will also terminate your script. Hence, the name. The usual error...