Checklists for software errors, setup, and tool workflows.

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Docker Container Exits Immediately After Start: Network Fixes

You start a Docker container and it exits right away. The container logs show no errors, or the e...

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Fixing Chrome Startup Crashes: A Practical Repair Guide

If Chrome crashes immediately when you open it, the problem is often in the user profile, a corru...

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...

Fix Docker Compose 'Port Already Allocated' for MySQL

You run docker compose up and get an error like Error: Port 3306 is already al...

Fix Windows 11 WiFi Connected but No Internet After Sleep
You wake your Windows 11 PC from sleep, the WiFi icon shows connected, but you can't load any...