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

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

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

Fix Windows 11 Setup Stuck at 99%

You're installing Windows 11 and the progress bar hangs at 99% for a long time. This is a kno...

Fix Windows 11 Bluetooth Not Connecting: Practical Steps

You try to connect a Bluetooth device—headphones, mouse, keyboard—but Windows 11 either doesn'...

Fix Docker Volume Permission Denied for Non-Root User

You run a Docker container as a non-root user and get a permission denied error when trying to wr...

Fix Nginx Configuration Test Failure for Upstream Directive

When you run nginx -t and get an error involving the upstream directive...

How to Fix Cloudflare SSL Full Strict Self-Signed Certificate Error