Checklists for software errors, setup, and tool workflows.

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Fix Nginx Configuration Test: Missing Semicolon Error

When running nginx -t to test your configuration, you might see an error like:

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...

How to Set Python Requests Timeout for the Entire Request

When you use the Python requests library, a request can hang indefinitely if the ser...

Chrome Certificate Error: Not Secure Site Workaround

You're trying to reach a site and Chrome shows a full-page warning: “Your connection is not p...

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...

Fix Python Permission Denied When Installing Packages with Conda
You're trying to install a Python package with Conda and see a 'permission denied' er...