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...

Fix Cloudflare 521 Error on Nginx: Step-by-Step Guide

If you see a Cloudflare 521 error, it means your origin server (the Nginx server behind Cloudflar...

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

Symptom

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

How to Merge Two Git Repositories with Unrelated Histories

You have two separate Git repositories that you now want to combine into one. Perhaps you acquire...

Fix Windows Update Error 0x80070005 by Taking Ownership

What Causes Error 0x80070005?

This error usually means Windows Update doesn't have pe...