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 Remote Desktop Error 0x80004005: Credential and Network Checks

When you attempt to connect to a remote PC and see error 0x80004005, the connection usually fails...

Fix Python Permission Denied When Running pip install -r requirements.txt

Fix DNS Probe Finished NXDOMAIN on Google DNS Setup

If you see "DNS probe finished NXDOMAIN" in your browser, it means your device couldn'...

Why Cloudflare DNS Changes Aren't Propagating

You updated a DNS record in Cloudflare but the change isn't showing up. Visitors still see th...

How to Fix DNS_PROBE_FINISHED_NXDOMAIN in Chrome

When Chrome shows DNS_PROBE_FINISHED_NXDOMAIN, it means the browser can't fi...