Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see bash: /path/to/venv/bin/activate: Permission denied when trying to activa...

When you run npm install and see an error like Error: EACCES: permission denie...

Fixing NGINX Upstream Connection Refused SSL Errors
When NGINX logs upstream connection refused for an SSL backend, it usually means the...

How to Resolve Git Merge Conflicts on the Same Line
You run git merge and get a conflict marker on a single line. The file shows both ve...

Fix 'Python Command Not Found' in Git Bash on Windows
When running Python in Git Bash on Windows, you may see bash: python: command not found

How to Repair Windows Security App Issues
If the Windows Security app won't open, shows a blank screen, or gives errors like "This ...