Checklists for software errors, setup, and tool workflows.

Docker Container Exits Immediately with Exit Code 137

You start a Docker container, and it exits almost immediately with exit code 137. This usually me...

Fix 'pip externally managed environment' Error for venv Setup

When creating a Python virtual environment on newer Linux distributions (e.g., Debian 12, Ubuntu ...

How to Fix Chrome Startup Crash by Disabling Extensions

If Chrome crashes as soon as you open it, a misbehaving extension is often the culprit. Extension...

How to Fix Chrome Sync Error 'Sign In Again'

What the Error Means

When Chrome displays 'Sign in again' in the sync settings, i...

Fixing Nginx Upstream Connection Refused on Port 443

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

Fix Python Memory Errors on Mac with Large Files

If you’re seeing a MemoryError in Python on your Mac while trying to load or process...