Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run pip install and see errors like “package A requires package B==1.0 but y...

Fix npm Global Install Permission Denied Without Sudo
When you run npm install -g and see "EACCES: permission denied", it's be...

Fixing Node Version Mismatch with package.json Engines
You run npm install or node app.js and see a warning or error about the...

Fixing Nginx Upstream Connection Refused and Permission Denied
If you see connect() failed (111: Connection refused) or connect() failed (13:...

Fix VS Code Terminal Not Opening Due to Settings You click the terminal panel icon in VS Code, but nothing happens. The panel doesn't slide up...

Fix DNS Probe Finished NXDOMAIN on Google DNS Setup If you see "DNS probe finished NXDOMAIN" in your browser, it means your device couldn'...