Checklists for software errors, setup, and tool workflows.

Fix 'fatal: refusing to merge unrelated histories' in Git

You cloned a repository, made some commits locally, and now when you try to git pull...

Fix Git 'index.lock' Error in VS Code

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

Docker Compose 'Network Not Found' Error Fix

When running docker compose up, you might see an error like:

network "my...

Fix VS Code Git Authentication Failed: Step-by-Step Guide

You're in the middle of a push or pull in VS Code, and you get a red error: "Authenticati...

Checklist for Nginx Configuration Test Failure

When you run nginx -t and get a failure, the server won't reload or restart. Thi...

How to Fix Cloudflare 521 Error During Setup

If you see a 521 error after setting up Cloudflare, it means your origin server refused the conne...