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

Fix Chrome Blank Screen Not Loading Pages

When Chrome opens but shows a blank white screen instead of your usual homepage or any website, i...

Debug SSH Public Key Authentication Failure: Step-by-Step

You're trying to SSH into a server with a public key, but you get "Permission denied (publickey)"...

How to Fix 'Port Already Allocated' for Windows Update Service

You might see a 'port already allocated' error when Windows Update tries to use a specific port t...

Fixing Nginx 404 Errors for API Endpoints

When your API returns a 404 error from Nginx but works locally, the problem is usually in the Ngi...

Fixing Microsoft Teams Rate Limit Error When Sending Messages

Fixing Windows Security 502 Bad Gateway Errors

If you see a 502 Bad Gateway error in Windows Security (or the Windows Defender portal), it usual...