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

How to Fix 'npm command not found' on Mac

Fix Chrome Profile Network Error: Pages Not Loading

You open Chrome, and pages just spin or show a network error. Other browsers work fine. This ofte...

UFW Deny Port But Still Accessible: Fixes and Checks

You set a UFW deny rule for a specific port, but the port remains accessible from outside. This i...

Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Proxy Error

When Chrome shows ERR_TUNNEL_CONNECTION_FAILED, it usually means a proxy connect...

How to Change the Default Shell in Windows Terminal

Windows Terminal lets you run multiple shells (PowerShell, Command Prompt, WSL, etc.) in one wind...

Fix Windows 10 Product Key Not Working After Hardware Change

You replaced a major component—often the motherboard—and now Windows 10 says your product key isn...