Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run git clone https://github.com/example/repo.git and after a long pause you get...

If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...

Configure Git HTTP Timeout to Avoid Clone Failures
If your Git clone or fetch operations time out with errors like fatal: unable to access ...

Cloudflare SSL Full Strict Troubleshooting Steps
If you have set Cloudflare SSL/TLS encryption to Full (strict) and your site shows errors like 52...

Docker Compose Port Already Allocated: Checklist
You run docker-compose up and get an error like Error starting userland proxy:...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM
You're seeing upstream connection refused in your Nginx error log, and your site...