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

How to Reset Remote Desktop Connection Settings

If you are having trouble connecting to a remote PC—maybe you keep seeing authentication errors, ...

Fix Nginx Redirect Loop After SSL Certificate Install

You installed an SSL certificate, and now your site redirects in a loop. The browser shows 'E...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Fix Git SSL Certificate Problem: Unable to Get Local Issuer

You run git clone https://example.com/repo.git and get:

How to Create a New Branch from a Detached HEAD in Git

If you see a message like "You are in 'detached HEAD' state" in Git, it means you...

Nginx Upstream Connection Refused: Diagnosis and Fixes

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