Checklists for software errors, setup, and tool workflows.

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Fix Nginx Upstream Connection Refused Socket Error

When Nginx returns a 502 Bad Gateway or logs upstream connection refused

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 Nginx Redirect Loop Caused by Rewrite Rules
Redirect loops in Nginx often appear as endless redirects between two URLs or as a browser error ...

How to Merge a Git Detached HEAD Back to Master
If you see a message like 'You are in 'detached HEAD' state' after checking out a...

Chrome Extensions Not Loading: Common Causes and Fixes
You open Chrome and notice your extensions are missing from the toolbar, or they appear greyed ou...

Fix Nginx Configuration Test Failure After SSL Setup
You've just added SSL certificates to your Nginx server block, but nginx -t retu...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Nginx Upstream Connection Refused Socket Error

Pip Externally Managed Environment vs Virtual Environment: Fixes

Fix Nginx Redirect Loop Caused by Rewrite Rules

How to Merge a Git Detached HEAD Back to Master

Chrome Extensions Not Loading: Common Causes and Fixes

Fix Nginx Configuration Test Failure After SSL Setup

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