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

How to Fix Nginx 'Upstream Connection Refused' Error

When Nginx returns a 502 Bad Gateway with upstream connection refused in the error l...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

You're seeing upstream connection refused in your Nginx error log, and your site...

How to Fix Cloudflare Error 522 Connection Timed Out

Error 522 appears when Cloudflare can connect to your origin server but the server doesn't re...

Fix Docker Volume Permission Denied on Mac

Fix Nginx Configuration Test Failure from Rewrite Rules

You run nginx -t and get an error. The log points to a rewrite rule. This is common ...

Fix Git Push Rejected Non-Fast-Forward After Pull

You run git pull, then git push, and get: ! [rejected] non-fast-f...