查看 端口所在線程 lsof -i:81
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 1867 pengxuan 189u IPv6 0x3a47bb02362d2d59 0t0 TCP *:hosts2-ns (LISTEN)
java 1867 pengxuan 196u IPv6 0x3a47bb02362d14d9 0t0 TCP localhost:hosts2-ns->localhost:58358 (CLOSE_WAIT)
殺死端口
pengxuandeMacBook-Air:~ pengxuan$ kill 1867