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 an award-winning company and the first in India to offer cloud training and consulting services worldwide. As a Microsoft Solutions Partner, AWS Advanced Tier Training Partner, and Google Cloud Platform Partner, CloudThat has empowered over 850,000 professionals through 600+ cloud certifications winning global recognition for its training excellence including 20 MCT Trainers in Microsoft’s Global Top 100 and an impressive 12 awards in the last 8 years. CloudThat specializes in Cloud Migration, Data Platforms, DevOps, IoT, and cutting-edge technologies like Gen AI & AI/ML. It has delivered over 500 consulting projects for 250+ organizations in 30+ countries as it continues to empower professionals and enterprises to thrive in the digital-first world.

WRITTEN BY Naveen H

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