PowerShell Introduction

PowerShell is a .NET-based command-line shell and scripting language. Its core feature is "object-centric": commands flow through the pipeline as objects rather than plain text, making it more intuitive and efficient for handling system resources and structured data.

• Versions and Positioning:
  • Windows PowerShell 5.1: Included with Windows, Windows only.
  • PowerShell 7+: Cross-platform (Windows, Linux, macOS), uses .NET (Core).
• Comparison with CMD and Bash:
  • CMD focuses on string processing; Bash is powerful in Unix-like environments but primarily text-based.
  • PowerShell's pipeline passes .NET objects, naturally suitable for managing APIs, registry, services, WMI/CIM, event logs, etc.
• Typical Applications:
  • Automation operations (batch modifications, configuration auditing, log collection, patches and deployment)
  • Development assistance (scripted builds, testing, packaging, publishing)
  • Desktop efficiency (replacement for batch files, quick automation, system information queries)

Design Philosophy: Verb-Noun naming (Get-Process, Set-Item), clear and discoverable; unified parameter and help system (Get-Help, Get-Command), reducing learning curve.