Knowledge base for software setup, errors, and daily tool work.

How to Create a New Branch from a Detached HEAD in Git

If you see a message like "You are in 'detached HEAD' state" in Git, it means you...

How to Resolve Cloudflare Origin Certificate Chain Issues

When Cloudflare's edge cannot validate your origin server's certificate chain, visitors m...

How to Fix Git Push Rejected Non-Fast-Forward Upstream

When you run git push and see rejected! non-fast-forward, it means your...

Fix Windows Update Error 0x80070002

Windows Update error 0x80070002 usually appears during an update attempt. The system may stall at...

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...

Fix Nginx Upstream Connection Refused in Proxy Pass