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

Bluetooth Icon Missing in Windows 11: How to Restore It

You open the system tray on Windows 11 and the Bluetooth icon is gone. Even if Bluetooth is turne...

Fix Docker 'network not found' Error for Custom Networks

You create a custom Docker network, then try to run a container attached to it, but get an error ...

How to Fix Cloudflare Error 521: Server Not Responding

Cloudflare error 521 appears when your origin server refuses the connection from Cloudflare's...

Fix pip Externally Managed Environment on Debian 12

If you're on Debian 12 and get error: externally-managed-environment when using ...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Git Merge Unrelated Histories: When and How to Use --allow-unrelated-histories

You try to merge two branches and get fatal: refusing to merge unrelated histories. ...