6.3.2.7. Lab 7: PowerShell Basics

6.3.2.7. Lab 7: PowerShell Basics (45 minutes)

Objective: Execute basic PowerShell commands and understand the object pipeline.

Setup: Windows computer with PowerShell (built-in)

Steps:

1. Check and Set Execution Policy

   Get-ExecutionPolicy
   # If Restricted, run PowerShell as Admin and execute:
   Set-ExecutionPolicy RemoteSigned
   

2. Basic Commands

   # Get help on any command
   Get-Help Get-Process
   
   # List all processes
   Get-Process
   
   # List top 10 processes by CPU usage
   Get-Process | Sort-Object CPU -Descending | Select-Object -First 10
   
   # List all services
   Get-Service
   
   # List only running services
   Get-Service | Where-Object {$_.Status -eq "Running"}
   

3. Working with Objects

   # Store processes in a variable
   $procs = Get-Process
   
   # Access properties of the first process
   $procs[0].Name
   $procs[0].CPU
   $procs[0].WorkingSet64 / 1MB  # Memory in MB
   

4. Create a Simple Script

   • Open Notepad and write:

     Write-Host "System Information Script" -ForegroundColor Cyan
     Write-Host "========================="
     $os = Get-CimInstance Win32_OperatingSystem
     Write-Host "Computer: $($os.CSName)"
     Write-Host "OS: $($os.Caption)"
     Write-Host "Version: $($os.Version)"
     

   • Save as SystemInfo.ps1 on your Desktop
   • Open PowerShell, navigate to Desktop, run: .\SystemInfo.ps1

Deliverable: Your working SystemInfo.ps1 script.