Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're using VS Code on Ubuntu and the Source Control panel shows no changes even after ed...

You try to run a Git command and see fatal: Unable to create 'path/.git/index.lock'...

Fix Nginx Upstream Connection Refused Socket Error
When Nginx returns a 502 Bad Gateway or logs upstream connection refused

Troubleshoot Windows Cannot Access Shared Folder
When you try to open a shared folder from another computer and see 'Windows cannot access \\c...

Fix DNS Probe Finished NXDOMAIN Error on Mac
You're browsing on your Mac and suddenly a site won't load, showing the error DNS...

Fix Git Authentication Failed in VS Code on Linux
You're working in VS Code on Linux, try to push or pull, and get a popup: "Git authentica...