Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You start a Docker container and it exits immediately with a message like /bin/sh: 1: somec...

Git Detached HEAD vs Attached HEAD: What It Means and How to Fix
If you've seen the message "You are in 'detached HEAD' state" while using Git...

VSCode Integrated Terminal Not Showing: Fixes to Try
You open the integrated terminal in Visual Studio Code using Ctrl+` (or Cmd+`<...

Fix VSCode Terminal Not Opening with Python
You try to run a Python script in VSCode, click the terminal tab, and nothing happens—or the term...

Docker Compose 'Network Not Found' Error Fix
When running docker compose up, you might see an error like:
network "my...

Fix Nginx Permission Denied Error for www-data User
If you see errors like nginx: [emerg] open() "/var/www/html/index.html" failed (13:...