PowerShell

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Master PowerShell Scripting with Functions, Modules, and Real-World Fixes

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Introduction

PowerShell isn’t just a scripting language. Whether you’re a sysadmin, DevOps engineer, or automation enthusiast, knowing how to write reusable code using functions, organize your scripts into modules, and troubleshoot effectively will save hours of repetitive work.

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PowerShell Functions: Reusable Brilliance

Functions let you encapsulate logic for reuse across scripts.

Basic Function Example:

# Usage

Creating PowerShell Modules: Organize Like a Pro

Modules help structure your scripts and functions into reusable components.

 

Step 1: Create a .psm1 File

Step 2: Import the Module

 

# Save the file, then:

# Use the functions

You can also create a module manifest (.psd1) for advanced features like versioning and dependency management.

Troubleshooting PowerShell Scripts: Common Pitfalls

Troubleshooting PowerShell Scripts: Common Pitfalls

  1. Use -Verbose and -Debug

Test-Network -Host “google.com” -Verbose

  1. $Error and Try/Catch for Error Handling
  1. Check Execution Policy

Scripts not running? Check:

Some More Examples :

  1. Function for Recursive Directory Search with Error Handling

This function searches for files within a directory and subdirectories, with error handling for inaccessible paths.

Usage:

This function allows searching recursively and includes error handling for invalid or inaccessible directories.

  1. PowerShell Module for Disk Space Monitoring (with Exported Data)

This module defines functions for monitoring disk space and exporting the data to a CSV file.

Usage:

This module allows you to monitor and export disk space usage into a CSV for later analysis.

  1. PowerShell Module for User Management (with Creation and Deletion)

This module provides user management functions for creating and deleting users with validation checks.

Usage:

This module manages user accounts by providing functions for both creating and removing users, with built-in validation to check if the user exists or not.

Conclusion

PowerShell scripting becomes truly powerful when you learn to structure your code with functions and modules, and master troubleshooting techniques.

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About CloudThat

CloudThat is a leading provider of Cloud Training and Consulting services with a global presence in India, the USA, Asia, Europe, and Africa. Specializing in AWS, Microsoft Azure, GCP, VMware, Databricks, and more, the company serves mid-market and enterprise clients, offering comprehensive expertise in Cloud Migration, Data Platforms, DevOps, IoT, AI/ML, and more.

CloudThat is the first Indian Company to win the prestigious Microsoft Partner 2024 Award and is recognized as a top-tier partner with AWS and Microsoft, including the prestigious ‘Think Big’ partner award from AWS and the Microsoft Superstars FY 2023 award in Asia & India. Having trained 850k+ professionals in 600+ cloud certifications and completed 500+ consulting projects globally, CloudThat is an official AWS Advanced Consulting Partner, Microsoft Gold Partner, AWS Training PartnerAWS Migration PartnerAWS Data and Analytics PartnerAWS DevOps Competency PartnerAWS GenAI Competency PartnerAmazon QuickSight Service Delivery PartnerAmazon EKS Service Delivery Partner AWS Microsoft Workload PartnersAmazon EC2 Service Delivery PartnerAmazon ECS Service Delivery PartnerAWS Glue Service Delivery PartnerAmazon Redshift Service Delivery PartnerAWS Control Tower Service Delivery PartnerAWS WAF Service Delivery PartnerAmazon CloudFront Service Delivery PartnerAmazon OpenSearch Service Delivery PartnerAWS DMS Service Delivery PartnerAWS Systems Manager Service Delivery PartnerAmazon RDS Service Delivery PartnerAWS CloudFormation Service Delivery PartnerAWS ConfigAmazon EMR and many more.

WRITTEN BY Naveen H

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