在尝试用zmq通讯的时候发现提示报错，端口已经被使用，于是需要将其关掉。
查询了下资料，发现了两个比较实用的命令，之前好像也有记过，只是一时间想不起，记录mark下。
1. 检查tcp 相关的PID
'lsof -iTCP -sTCP:LISTEN -n -P'
xiaoqiangs-MacBook-Pro:~ xiaoqiang$ lsof -iTCP -sTCP:LISTEN -n -P
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
rapportd 350 xiaoqiang 3u IPv4 0xec53b94e3395aac9 0t0 TCP *:49179 (LISTEN)
rapportd 350 xiaoqiang 5u IPv6 0xec53b94e2fcdc949 0t0 TCP *:49179 (LISTEN)
ARDAgent 393 xiaoqiang 10u IPv6 0xec53b94e2fcdcf09 0t0 TCP *:3283 (LISTEN)
Python 4155 xiaoqiang 17u IPv4 0xec53b94e462be4c9 0t0 TCP *:6750 (LISTEN)
Python 4202 xiaoqiang 17u IPv4 0xec53b94e489d54c9 0t0 TCP *:6252 (LISTEN)
Python 4202 xiaoqiang 34u IPv4 0xec53b94e489d07c9 0t0 TCP *:6202 (LISTEN)
Python 4205 xiaoqiang 17u IPv4 0xec53b94e48c98ac9 0t0 TCP *:6251 (LISTEN)
Python 4205 xiaoqiang 34u IPv4 0xec53b94e489cfe49 0t0 TCP *:6201 (LISTEN)
Python 4206 xiaoqiang 17u IPv4 0xec53b94e48c98149 0t0 TCP *:6250 (LISTEN)
Python 4206 xiaoqiang 34u IPv4 0xec53b94e489cf4c9 0t0 TCP *:6200 (LISTEN)
Python 4208 xiaoqiang 17u IPv4 0xec53b94e48d1fe49 0t0 TCP *:6253 (LISTEN)
Python 4208 xiaoqiang 34u IPv4 0xec53b94e4896b4c9 0t0 TCP *:6203 (LISTEN)
2.查看指定端口的信息
lsof -i:xxx(Port)
3.检查tcp相关的连线信息(Port,IP)
'netstat -ltnp tcp'
xiaoqiangs-MacBook-Pro:~ xiaoqiang$ netstat -ltnp tcp
Active Internet connections
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp4 0 0 192.168.7.240.52968 203.208.40.34.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58929 203.208.41.38.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58884 203.208.41.100.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58832 203.208.41.100.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58830 203.208.40.70.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58829 151.101.65.69.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58798 203.208.41.38.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58794 203.208.41.38.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58783 203.208.41.38.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58781 203.208.41.38.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58673 113.96.181.234.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58671 101.226.211.51.443 ESTABLISHED
tcp4 0 0 192.168.7.240.58670 203.208.40.105.443 ESTABLISHED
tcp4 0 0 192.168.7.240.57050 17.248.159.117.443 ESTABLISHED
tcp4 0 0 192.168.7.240.62920 17.248.159.117.443 ESTABLISHED
tcp4 0 0 192.168.7.240.62158 203.208.41.65.443 ESTABLISHED
tcp4 0 0 127.0.0.1.6250 127.0.0.1.63763 ESTABLISHED
tcp4 0 0 127.0.0.1.63763 127.0.0.1.6250 ESTABLISHED
tcp4 0 0 127.0.0.1.6251 127.0.0.1.63552 ESTABLISHED
tcp4 0 0 127.0.0.1.6253 127.0.0.1.63758 ESTABLISHED
tcp4 0 0 127.0.0.1.63758 127.0.0.1.6253 ESTABLISHED
tcp4 0 0 127.0.0.1.6252 127.0.0.1.63736 ESTABLISHED
tcp4 0 0 127.0.0.1.63736 127.0.0.1.6252 ESTABLISHED
tcp4 0 0 127.0.0.1.63552 127.0.0.1.6251 ESTABLISHED
想要关闭进程的话，就直接下：
kill -9 xxx(PID)
PID的获得有2种方法：
第一种就是方法一所说，用lsof监测所有tcp相关的信息，会列出PID
第二种方法，可以通过ps aux |grep 'xxx(某进程)'来获取