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

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Windows 11 Update Blue Screen Error Code: How to Fix

If you see a blue screen with an error code after applying a Windows 11 update, you're not al...

Fix 'package.json Not Found' After Cloning a Repository

Symptom

You clone a repository from GitHub (or another remote), change into the directory...

Fix ERR_NAME_NOT_RESOLVED in Chrome: Proxy Settings Guide

If you see ERR_NAME_NOT_RESOLVED in Chrome, it usually means the browser can'...