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

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

How to Fix Nginx Redirect Loop 302 Errors

You're seeing a 302 redirect loop in Nginx — the browser keeps bouncing between URLs until it...

Fix DNS Probe Finished NXDOMAIN Not Working on WiFi

If you see "DNS_PROBE_FINISHED_NXDOMAIN" in Chrome while connected to WiFi, your browser ...

Docker Compose Environment Variable from Shell Not Working: Fixes

You set an environment variable in your shell, but Docker Compose ignores it. This is a common pi...

Docker Container Exits Immediately: Diagnosing Out of Memory

You start a Docker container and it exits within seconds. The logs show nothing obvious, or they ...

Chrome Certificate Error Invalid Authority: Diagnosis Checklist

When Chrome shows NET::ERR_CERT_AUTHORITY_INVALID and refuses to load a site, it...