Posts | Darren's Tech Tutorials

Notepad++ Tutorial How to find and replace in files using Notepad++

Published on December 1, 2025

Stop Wasting Time: How to Find and Replace Across Multiple Files with Notepad++

If you’ve ever had to update a common term or setting (like a server URL or an API key) across dozens, or even hundreds, of files, you know the pain of opening each one individually, hitting Ctrl+F, making the change, saving, and repeating. It’s tedious, prone to error, and frankly, a massive waste of time.

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Rocky Linux 9 Installation: From Download to Setup

Published on December 1, 2025

The RHEL Replacement: Step-by-Step Installation of Rocky Linux 9.1 (VirtualBox Ready!)

Hi there! This is Darren O’Neill from Darren’s Tech Tutorials, and I’m excited to walk you through installing one of the most stable and important Linux distributions available today: Rocky Linux.

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Unable to open primary script

Published on December 1, 2025

Stop the Stress! How to Fix ‘unable to open primary script permission denied’ (CentOS 8 PHP/Moodle Fix)

Hi there! This is Darren O’Neill from Darren’s Tech Tutorials. If you’ve been spending hours scratching your head, wrestling with file permissions (chmod and chown) only to keep seeing the dreaded “Permission denied” error when trying to load your PHP application (like Moodle) on CentOS 8, you are definitely not alone.

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