PowerShell is a tool for telling your computer what to do. It’s a command-line shell, like the black-and-white Command Prompt window you might have seen, but far more powerful. It’s also a scripting language, which means you can write entire programs to automate repetitive tasks.

It was created by Microsoft in the early 2000s to give system administrators a better way to manage Windows servers. Before PowerShell, administrators often had to click through endless menus and windows. PowerShell let them type simple commands to get complex jobs done quickly.

What started as a Windows-only tool is now open-source and cross-platform. You can run PowerShell on Windows, macOS, and Linux, making it a versatile skill for anyone in IT or cybersecurity.

In PowerShell, commands are called cmdlets (pronounced "command-lets"). They have a consistent, easy-to-understand structure: a verb and a noun, joined by a hyphen. This Verb-Noun format makes them predictable.

Let’s try a few simple ones. If you open PowerShell, you’ll see a prompt, usually starting with PS. Type this command and press Enter:

As you’d expect, it shows you the current date and time. Now, let’s see the files and folders in our current location.

This cmdlet lists the contents of your current directory. It's the PowerShell equivalent of dir in the old Command Prompt or ls in Linux. In fact, dir and ls often work in PowerShell as aliases, or nicknames, for Get-ChildItem.

You don't need to memorize every cmdlet. PowerShell has a built-in help system that is incredibly useful. The key is the Get-Help cmdlet.

To learn about any cmdlet, just ask Get-Help for information. For example, to find out what Get-Process does and how to use it, type:

This command gives you a description, the syntax, and other details. Sometimes you just want to see practical examples. For that, you can add a parameter. Parameters are extra pieces of information that modify how a cmdlet works. They usually start with a hyphen.

This shows you several examples of Get-Process in action, which is often the fastest way to learn how to use a new command. If you ever run into a new cmdlet, your first step should always be to use Get-Help.

With these basics, you can start exploring your system and learning more about what PowerShell can do.