Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

VSCode Terminal Not Opening on Ubuntu: Fixes That Work

You open the integrated terminal in VSCode on Ubuntu, but nothing happens—no shell, no error, jus...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

You're seeing upstream connection refused in your Nginx error log, and your site...

Fix Nginx Redirect Loop Caused by Rewrite Rules

Redirect loops in Nginx often appear as endless redirects between two URLs or as a browser error ...

Chrome Sync Not Working After Disabling Extensions: Fixes

You disabled some Chrome extensions to troubleshoot a problem, and now sync has stopped working –...

How to Set npm Prefix to Avoid Permission Denied Errors

If you've seen EACCES: permission denied when running npm install -g

Fix Externally Managed Error: Create Virtual Environment
If you're on a modern Linux distribution and try to install a Python package with pip, you ma...