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

Fixing Cloudflare 521 Error After Server Restart

You restart your server, wait for it to come back up, then visit your site—only to see a Cloudfla...

Fix Windows 11 Bluetooth Driver Not Working

You're trying to connect a Bluetooth device in Windows 11, but the toggle is grayed out, devi...

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. ...

How to Fix Nginx Redirect Loop That Prevents Site Loading

You open your site, and the browser keeps loading until it times out or shows a redirect error. T...

Fix Discord Black Screen from Chrome Hardware Acceleration

Why Chrome Hardware Acceleration Causes Discord Black Screen

When Chrome uses hardware a...

Fix 'nginx -t test failed no such file or directory' Error

When running nginx -t to test configuration, you may encounter the error nginx...