Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see Permission denied when running pip install --user somepackage

Chrome Certificate Error: Not Secure Site Workaround
You're trying to reach a site and Chrome shows a full-page warning: “Your connection is not p...

How to Fix DNS_PROBE_FINISHED_NXDOMAIN in Chrome
When Chrome shows DNS_PROBE_FINISHED_NXDOMAIN, it means the browser can't fi...

Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...

Docker Compose Environment Variable Not Set in Dockerfile
You set an environment variable in your docker-compose.yml file, but when you try to...

Fix VS Code Terminal Not Working After Update
After a VS Code update, the integrated terminal may fail to start, show a blank window, or displa...