Checklists for software errors, setup, and tool workflows.

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Fix Nginx Upstream Connection Refused in Proxy Pass

When Nginx returns a 502 Bad Gateway or logs upstream connection refused

Fix Windows Defender Real-Time Protection Not Starting
If you see a yellow warning or a message that real-time protection is off, Windows Defender’s cor...

Fix VSCode Terminal 'Permission Denied' on Windows
If you see 'permission denied' in the VSCode integrated terminal on Windows, it's usu...

Fix Git Detached HEAD State in Visual Studio Code
You open your project in Visual Studio Code, check the Git graph or status bar, and see something...

Renew an Expired Cloudflare Origin Certificate: Step-by-Step
If your Cloudflare origin certificate has expired, visitors will see SSL errors and your server m...

Docker Network Not Found: Troubleshooting Checklist
When Docker complains network not found, containers can't start or connect. This...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Nginx Upstream Connection Refused in Proxy Pass

Fix Windows Defender Real-Time Protection Not Starting

Fix VSCode Terminal 'Permission Denied' on Windows

Fix Git Detached HEAD State in Visual Studio Code

Renew an Expired Cloudflare Origin Certificate: Step-by-Step

Docker Network Not Found: Troubleshooting Checklist

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