Knowledge base for software setup, errors, and daily tool work.

Recover Lost Changes After Git Detached HEAD

You've made several edits, then checked out an old commit or tag, and now Git says you're...

Firefox Secure Connection Failed: How to Fix

When Firefox shows 'Secure Connection Failed' or similar warnings like 'PR_END_OF_FIL...

How to Set Node Version for a Project

When working on multiple projects that require different Node.js versions, you may encounter erro...

Fix Nginx Permission Denied for Static Files

Common Causes

When Nginx returns a 403 Forbidden or 'permission denied' error for...

Fix Python Venv Not Activating in PowerShell

You open PowerShell, navigate to your project, and run venv\Scripts\activate but not...

Fix Git 'index.lock file exists' Error

When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....