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

How to Fix Nginx 404 Not Found Error

Seeing a 404 Not Found error in Nginx often means the server is running but can't locate the requ...

Fix Chrome Auto Start with Profile Not Working on Mac

If you rely on Chrome opening automatically when you log in to your Mac—and with a specific profi...

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 Windows Terminal Permission Denied Error

If you see "permission denied" when opening Windows Terminal, launching a shell, or running a com...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

If you're dual-booting Windows and Ubuntu, or replacing Windows...

Fix Windows Activation Server Not Available Error

When you see the message "Windows activation server is not available" while trying to activate Wi...