Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're connected to Wi-Fi, but websites won't load and apps show no internet. This is a c...

You're seeing a Cloudflare 522 error: connection timed out between Cloudflare and your origin...

If you use SourceTree and see an error message like fatal: Unable to create 'path/to/.g...

Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused

How to Fix Git Clone Timeout with SSH Key
You run git clone [email protected]:user/repo.git and wait. After a while, you get a ti...

Fix 'Permission Denied' When Running pip install --user
When you run pip install --user somepackage and get a Permission denied...