lsof -i:사용포트넘버
juju@jujuuiMcBookPro ~ % lsof -i:9191
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 53968 juju 219u IPv6 0x41166768056b5d59 0t0 TCP *:sun-as-jpda (LISTEN)kill -9 위에서나온PID넘버
juju@jujuuiMcBookPro ~ % xkill -9 53968