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

Fix Cloudflare 521 Error Due to Server Overload

You see a Cloudflare 521 error page. The message says the web server is down. Often, this means y...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Fix Cloudflare DNS Propagation Not Happening for www

You updated DNS records for your www subdomain in Cloudflare, but hours (or days) later, the chan...

Common Causes of Nginx Configuration Test Failure

When you run nginx -t and see an error, it usually means a syntax mistake, a missing...

Chrome Extensions Not Loading? 7 Fixes to Try

You open Chrome and notice your extensions are missing from the toolbar, or they show up but don&...

Pip Externally Managed Environment vs Virtual Environment: Fixes

You try to install a Python package with pip, and get an error like error: externally-manag...