Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You click Windows Terminal and nothing happens, or you see a 404 error message. This usually mean...

When you run pip install scipy on a Mac and get ERROR: No matching distributio...

How to Fix Docker Image Pull Unauthorized Errors
You run docker pull and get an error like unauthorized: authentication require...

PowerShell on Ubuntu 22.04: Setup Checklist
If you're setting up PowerShell on Ubuntu 22.04, you might hit errors like 'command not found' or...

How to Fix Windows Defender 'Command Not Found' Error
You open Command Prompt to run MpCmdRun.exe or Get-MpPreference and get...

Fix 'systemd service failed to start unit not found' Error
When you run systemctl start myapp.service and get Failed to start myapp.servi...