lsof -i :포트번호 8080 포트를 사용하는 프로그램을 검색합니다. > lsof -i :8080 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME Postman 29342 root 57u IPv4 0xdd8bb46e75db00c5 0t0 TCP localhost:64267->localhost:http-alt (ESTABLISHED) __debug_b 48848 root 4u IPv4 0xdd8bb46e75d31755 0t0 TCP *:http-alt (LISTEN) __debug_b 48848 root 8u IPv4 0xdd8bb46e75d840c5 0t0 TCP localhost:http-alt->localhost:64267 (ESTABLISHED) LIS..