Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you see upstream connection refused or upstream not found in your ...

When running test suites, you may encounter a fatal error like FATAL ERROR: Ineffective mar...

Fix Nginx Configuration Test Failed: Duplicate Listen Error
When running nginx -t to test your configuration, you may see an error like "...

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...

Fix 'Python Command Not Found' in Git Bash on Windows
When running Python in Git Bash on Windows, you may see bash: python: command not found

How to Stop Windows Explorer from Restarting
If Windows Explorer (explorer.exe) keeps restarting—your taskbar disappears and reappears, or you...