Checklists for software errors, setup, and tool workflows.

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Fix Nginx Upstream Connection Refused in Proxy Pass

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

Docker Network Not Found in Swarm Mode: Fixes & Causes
When running Docker in Swarm mode, you might see an error like network "xyz" not fo...

Chrome Extensions Not Loading: Fixes for Common Issues
If you open Chrome and notice your extensions are missing, grayed out, or not responding, you'...

Fix Docker Compose Port Already Allocated for PostgreSQL
You run docker-compose up and see an error like "Error starting userland pro...

How to Fix Git Index Lock File Exists Error
If you see an error like fatal: Unable to create 'path/to/repo/.git/index.lock': Fi...

Fix 'network not found' Error in Docker on Linux
When you see docker: Error response from daemon: network <name> not found on L...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Nginx Upstream Connection Refused in Proxy Pass

Docker Network Not Found in Swarm Mode: Fixes & Causes

Chrome Extensions Not Loading: Fixes for Common Issues

Fix Docker Compose Port Already Allocated for PostgreSQL

How to Fix Git Index Lock File Exists Error

Fix 'network not found' Error in Docker on Linux

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