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Automating Infrastructure and Administration with PowerShell

· 2 min read
Automation Expert
Automation Expert
Senior Devops Engineer

PowerShell has become one of the most powerful automation tools for system administrators, cloud engineers, and DevOps teams. With deep integration into Windows, Azure, and cross-platform support through PowerShell Core, it enables efficient automation across modern infrastructure environments.

Why PowerShell?​

PowerShell combines command-line capabilities with a full scripting language built on top of .NET.

Key advantages include:

  • Object-oriented scripting
  • Native Windows administration
  • Cross-platform support
  • Azure and Microsoft 365 automation
  • Powerful remoting capabilities

Unlike traditional shell scripting, PowerShell works with structured objects instead of plain text output.

Installing PowerShell​

On Windows using Winget:

winget install --id Microsoft.PowerShell --source winget

Verify installation:

pwsh --version

Basic Commands​

List running processes:

Get-Process

View services:

Get-Service

Get system information:

Get-ComputerInfo

Writing Your First Script​

Create a script file named cleanup.ps1:

$logPath = "C:\Logs"

Get-ChildItem $logPath -Filter *.log |
Where-Object { $_.LastWriteTime -lt (Get-Date).AddDays(-7) } |
Remove-Item -Force

This script removes log files older than seven days.

Working with APIs​

PowerShell can easily interact with REST APIs.

Example:

$URL = "https://api.github.com/repos/microsoft/PowerShell"
$response = Invoke-RestMethod -Uri $URL
$response.full_name

This makes PowerShell useful for cloud automation and DevOps workflows.

PowerShell Remoting​

Enable remoting:

Enable-PSRemoting -Force

Run commands remotely:

Invoke-Command -ComputerName server01 `
  -ScriptBlock { Get-Service }

PowerShell remoting is widely used for centralized server administration.

Azure Automation​

Install Azure PowerShell modules:

Install-Module Az -Scope CurrentUser

Login to Azure:

Connect-AzAccount

Provision resources programmatically:

New-AzResourceGroup `
  -Name dev-rg `
  -Location eastus

Best Practices​

  • Use functions for reusable logic
  • Store scripts in version control
  • Implement error handling
  • Use parameterized scripts
  • Avoid hardcoded credentials

Conclusion​

PowerShell continues to be an essential automation platform for DevOps engineers and system administrators. Its combination of scripting, infrastructure management, and cloud integration makes it a valuable tool for modern operational workflows.