Checklists for software errors, setup, and tool workflows.

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Latest checklists

You try to merge two branches in Git, and get fatal: refusing to merge unrelated histories<...

How to Fix Git Merge Unrelated Histories Error
You run git pull or git merge and get:
fatal: refusing to...

Fix Cloudflare Wildcard Subdomain and Root Domain Conflict
If you use a wildcard DNS record (e.g., *.example.com) on Cloudflare, you may run in...

Fix 'nginx: configuration test failed unexpected end of file'
When running nginx -t or nginx -t -c /path/to/nginx.conf, you might see...

How to Remove the Externally Managed Environment Flag in pip
If you're seeing error: externally-managed-environment when using pip on a moder...

Fix Docker Compose Port Already Allocated on Linux
You run docker-compose up and get an error like Error starting userland proxy:...