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PowerShell Core for Linux Administrators Cookbook

You're reading from   PowerShell Core for Linux Administrators Cookbook Use PowerShell Core 6.x on Linux to automate complex, repetitive, and time-consuming tasks

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Product type Paperback
Published in Nov 2018
Publisher Packt
ISBN-13 9781789137231
Length 566 pages
Edition 1st Edition
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Authors (2):
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Ram Iyer Ram Iyer
Author Profile Icon Ram Iyer
Ram Iyer
Prashanth Jayaram Prashanth Jayaram
Author Profile Icon Prashanth Jayaram
Prashanth Jayaram
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Table of Contents (19) Chapters Close

Preface 1. Introducing PowerShell Core FREE CHAPTER 2. Preparing for Administration Using PowerShell 3. First Steps in Administration Using PowerShell 4. Passing Data through the Pipeline 5. Using Variables and Objects 6. Working with Strings 7. Flow Control Using Branches and Loops 8. Performing Calculations 9. Using Arrays and Hashtables 10. Handling Files and Directories 11. Building Scripts and Functions 12. Advanced Concepts of Functions 13. Debugging and Error Handling 14. Enterprise Administration Using PowerShell 15. PowerShell and Cloud Operations 16. Using PowerShell for SQL Database Management 17. Using PowerShell with Docker 18. Other Books You May Enjoy

Introduction

Variables are important to programming since they act as containers of information that are stored during the program's execution. Although piping makes PowerShell highly versatile, they still cannot replace variables, because objects passed through the pipeline must be consumed immediately, and not all scripts work that way, given our varied requirements.

We are all aware of the various data types: int, double, string, char, array, and so on. Two other important types of variables in PowerShell are hashtables and objects. A hashtable is a dictionary table that's formed with key-value pairs. An object, as we have seen, could be as complex and as simple as it can get in PowerShell, that is, holding values of different kinds.

In PowerShell, objects can be stored in variables. For instance, check out the following command:

PS> $Processes = Get-Process

Using...

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