Checklists for software errors, setup, and tool workflows.

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Latest checklists

If you're on a modern Linux distribution and see error: externally-managed-environment<...

Docker Prune Not Freeing Enough Space: Practical Fixes
You run docker system prune -a expecting a big space recovery, but the freed space i...

Fix 'Python Virtual Environment Activate Command Not Found'
When you try to activate a Python virtual environment with source venv/bin/activate ...

Git Merge Conflict Auto Resolve Not Working: Common Fixes
You run git merge expecting conflicts to be resolved automatically, but instead you ...

Fix Docker Pull Access Denied Due to Token Expiration
You try to pull an image from a private registry and get access denied or toke...

Fix Nginx Upstream Connection Refused Behind Cloudflare
If you see upstream connection refused in your Nginx error logs while using Cloudfla...