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python -m http.server 11501
For a decade, we accepted 3000 (Node), 8000 (Python), 8080 (Java), 5000 (Flask). Those defaults were legacy decisions, often made when localhost had no competition from containers, VMs, or remote dev containers. Today, a single laptop runs a dozen services simultaneously. The old ports are a minefield. localhost 11501 new
If you find yourself constantly dealing with port conflicts, it's a sign that you need a better system. Relying on memory or sticky notes doesn't scale. Here are two modern, professional approaches to keeping your development ports in check. python -m http