المنافذ وأدوات الشبكة

في هذا الدرس

find which process listens on a port.

الموضوعات المخطط لها

• A port is a numbered door on a machine; one process can listen on a port at a time.
• ss -tlnp lists listening TCP ports with the process (may need sudo).
• lsof -i :8080 shows what uses port 8080.
• curl -v localhost:8080/actuator/health tests an endpoint.
• "Address already in use" means another process holds the port.