Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

Windows Explorer (now called File Explorer) freezing or showing "not responding" is a com...

If you see "EACCES: permission denied" or "Error: EACCES, mkdir" when running npm...

If you're seeing fatal: unable to access 'https://...' : Failed to connect ...:...

Resolving Git Merge Conflicts in package-lock.json
If you work on a Node.js project with multiple contributors, you've likely seen a merge confl...

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

Fix PyCharm Virtual Environment Not Activating
When you open a terminal in PyCharm and see the base Python interpreter instead of your virtual e...