PowerShell 7 Workshop: Learn how to program with PowerShell 7 on Windows, Linux, and the Raspberry Pi

the capabilities of PowerShell 7 for your everyday tasks with this carefully paced tutorial that will help you master this versatile programming language.The first set of chapters will show you where to find and how to install the latest version of PowerShell, providing insights into the distinctive features that set PowerShell apart from other languages. You'll then learn essential programming concepts such as variables and control flow, progressing to their applications. As you advance, you'll work with files and APIs, writing scripts, functions, and modules. You'll also gain proficiency in securing your PowerShell environment before venturing into different operating systems.Enriched with detailed practical examples tailored for Windows, Linux, macOS, and Raspberry Pi, each chapter weaves real-world scenarios to ignite your imagination and cement the principles you learn. You'll be able to reinforce your understanding through self-assessment questions and delve deeper into the principles using comprehensive reading lists.By the end of this book, you'll have the confidence to use PowerShell for physical computing and writing scripts for Windows administration.What you will learnGrasp the distinctive object-oriented nature of PowerShell 7Explore the practical applications of standard programming concepts, such as control flowFind out how to interact with websites and APIsImplement best practices to secure your PowerShell environment and write secure codeGet to grips with writing scripts, functions, and modulesDevelop the skills to troubleshoot your codeDeploy PowerShell on various operating systems Cover Title Page Copyright and Credits Contributors Table of Contents Preface Part 1: PowerShell Fundamentals Chapter 1: Introduction to PowerShell 7 – What It Is and How to Get It Technical requirements What is PowerShell 7? What is PowerShell 7 used for? Scripting languages versus system programming languages Getting PowerShell 7 Installation from an .msi file Installation from the .zip file Installation with winget Other ways to install Running PowerShell 7 Running PowerShell with administrator privileges Autocomplete Getting help Get-Command Get-Help Get-Member Summary Exercises Further reading Chapter 2: Exploring PowerShell Cmdlets and Syntax Technical requirements What are cmdlets? Exploring cmdlet structure The correct use of aliases Understanding cmdlet syntax How to find more cmdlets Finding modules and cmdlets on your machine Finding new modules and cmdlets Working interactively with PowerShell Windows Terminal – an alternative terminal emulator Installing Windows Terminal from Microsoft Store Summary Exercises Chapter 3: The PowerShell Pipeline – How to String Cmdlets Together How to bring cmdlets together – the pipeline What is an object? Selecting and sorting objects Using Select-Object Ordering objects with Sort-Object Filtering objects Understanding comparison operators Understanding Where-Object advanced syntax Multiple filters in the advanced syntax Filter optimization Enumerating objects Parallel enumeration How the pipeline works – parameter binding Understanding ByValue parameter binding ByPropertyName parameter binding Troubleshooting the pipeline – pipeline tracing Summary Exercises Further reading Chapter 4: PowerShell Variables and Data Structures Understanding PowerShell variables Variables are not their contents Naming variables The three common types of PowerShell variable Exploring object types What is an object? – redux Discovering value types Booleans Integers Real numbers Char Typing explained Dynamic versus static typing Casting variables Navigating reference types Arrays Strings Hashtables Splatting – a cool use for hashtables Summary Exercises Further reading Chapter 5: PowerShell Control Flow – Conditionals and Loops An introduction to IDEs and VS Code Installing VS Code Configuring VS Code for PowerShell Conditional control – if, else, elseif, and switch The if statement The switch statement Loops – foreach, do while, do until, while, for The foreach loop statement The do while and do until loop statements The while loop The for loop Breaking and continuing The break statement The continue statement Let’s play a game Summary Exercises Further reading Chapter 6: PowerShell and Files – Reading, Writing, and Manipulating Data Understanding formatting Format-List Format-Table Format-Wide Formatting gotchas Writing a text file Using ConvertTo- and Export- cmdlets CSV XML HTML Handling files A brief note about PSProviders and PSDrives Item- cmdlets Working with files Get-Content Import- cmdlets Let’s have some fun – measuring the most frequent words in a text file Summary Exercises Further reading Chapter 7: PowerShell and the Web – HTTP, REST, and JSON Working with HTTP Why don’t we see Forms information in PowerShell 7? Authentication Getting to grips with APIs RPC APIs SOAP APIs REST APIs WebSocket APIs Working with REST Invoke-RestMethod Working with JSON ConvertFrom-Json ConvertTo-Json Test-Json Let’s have some fun – who is on the International Space Station? Summary Exercises Further reading Part 2: Scripting and Toolmaking Chapter 8: Writing Our First Script – Turning Simple Cmdlets into Reusable Code Introduction to scripting Why do we want to write scripts? Getting scripts Running scripts Writing a script Identifying changing values Working with parameters Creating useful parameters Specifying type Making parameters mandatory Taking values from the pipeline Switch parameters Providing help for our script Comments Comment-based help Write-Verbose Parameter help messages Summary Further reading Exercises Chapter 9: Don’t Repeat Yourself – Functions and Scriptblocks Why do we care about repeating code? How to turn repeating code into a function What makes a function? Function parameters Filters The concept of scope Parent and child scopes Scope modifiers Exploring scriptblocks How to run a scriptblock Lambdas Let’s do something useful Summary Further reading Exercises Chapter 10: Error Handling – Oh No! It’s Gone Wrong! What is an error? Terminating and non-terminating exceptions and errors Understanding error actions The $ErrorActionPreference variable The -ErrorAction parameter Catching errors Try/Catch/Finally Creating errors Exploring debugging Script instrumentation Debugging cmdlets Debugging with VS Code Summary Exercises Further reading Chapter 11: Creating Our First Module Working with modules Module locations Module autoloading Importing modules PowerShellGet Writing a simple module A word of caution – dot-sourcing Turning a script into a module Nested modules More modules Module manifests Using scaffolding tools such as Plaster Summary Exercises Further reading Chapter 12: Securing PowerShell Why is security so important? A PowerShell remoting whistlestop tour Enabling PowerShell remoting Creating a session Joining and leaving a session One-to-many sessions Securing PowerShell against inadvertent mistakes Execution policy Other features Running PowerShell securely Application control Language modes Security servicing criteria Software Bill of Materials Windows Antimalware Scan Interface support Secure Shell (SSH) remoting Just Enough Administration PowerShell logging Over the shoulder logging Deep script block logging Module logging Writing secure code Storing passwords securely Signing scripts Parameter security Summary Exercises Further reading Part 3: Using PowerShell Chapter 13: Working with PowerShell 7 and Windows Understanding PowerShell 7 and Windows PowerShell Exploring compatibility Which modules are compatible with PowerShell 7? What doesn’t work with PowerShell 7 Managing machines with CIM and WMI Introduction to CIM and WMI Querying data Making changes Summary Exercises Further reading Chapter 14: PowerShell 7 for Linux and macOS Technical requirements Installing PowerShell 7 Installing PowerShell on Ubuntu 22.04 Installing PowerShell on CentOS 8 and 9 Installing PowerShell on CentOS 7 Installing VS Code Running PowerShell on Linux Remoting with OpenSSH Checking that PowerShell has OpenSSH support Installing OpenSSH on Windows Installing OpenSSH on Linux Running remote sessions Authentication PowerShell for macOS Installing Homebrew on macOS Installing PowerShell on macOS Installing VS Code on macOS Summary Exercises Further reading Chapter 15: PowerShell 7 and the Raspberry Pi Technical requirements Introduction to the Raspberry Pi Installing PowerShell 7 and VS Code Installing PowerShell Installing VS Code Connecting remotely to the Pi Working with a headless Pi Connecting to the Pi with PowerShell Connecting to the Pi with VS Code Running PowerShell on Raspberry Pi OS Installing the IoT module Exploring the IoT module Simple physical computing Summary Questions Further reading Chapter 16: Working with PowerShell and .NET Exploring .NET Software frameworks explained Common language infrastructure Common language runtime – CoreCLR Framework Class Library – CoreFX .NET history The uses of .NET The components of .NET Assemblies Types Enumerations Classes Namespaces Members Versioning Working with .NET in PowerShell PowerShell assemblies Dynamic assembly loading Creating instances of types Using .NET An alternative to the Task Scheduler Creating GUI objects Summary Exercises Further reading Answers to Activities and Exercises Index Other Books You May Enjoy Discover the capabilities of PowerShell 7 for your everyday tasks with this carefully paced tutorial that will help you master this versatile programming language. The first set of chapters will show you where to find and how to install the latest version of PowerShell, providing insights into the distinctive features that set PowerShell apart from other languages. You’ll then learn essential programming concepts such as variables and control flow, progressing to their applications. As you advance, you’ll work with files and APIs, writing scripts, functions, and modules. You’ll also gain proficiency in securing your PowerShell environment before venturing into different operating systems. Enriched with detailed practical examples tailored for Windows, Linux, macOS, and Raspberry Pi, each chapter weaves real-world scenarios to ignite your imagination and cement the principles you learn. You’ll be able to reinforce your understanding through self-assessment questions and delve deeper into the principles using comprehensive reading lists. By the end of this book, you’ll have the confidence to use PowerShell for physical computing and writing scripts for Windows administration.