PowerShell

A task-based command-line shell and scripting language built on .NET.

When to Use

• Windows system administration
• Azure management
• Object-oriented scripting
• Cross-platform automation (PowerShell Core)

Quick Start

$name = "World"
Write-Host "Hello, $name!"

$processes = Get-Process | Where-Object { $_.CPU -gt 10 }
foreach ($p in $processes) {
    Write-Output $p.Name
}

Core Concepts

Cmdlets

Lightweight commands used in the PowerShell environment (Verb-Noun structure).

• Get-Process
• New-Item
• Set-Location

Objects

PowerShell pipes Objects, not text.

Get-Service | Select-Object -Property Name, Status

Pipeline

Passes objects from one cmdlet to the next.

Best Practices

Do:

• Use the Verb-Noun naming convention for functions
• Use Try/Catch for error handling
• Use [CmdletBinding()] for advanced functions
• Output objects, not text (Write-Output over Write-Host)

Don’t:

• Parse text output like in Bash (use object properties)
• Use aliases in scripts (readability)

References

• Microsoft PowerShell Docs