Mac下启动nginx服务时，经常会遇见到端口被占用的情况。

如何杀死占用相应端口的进程呢？

1.查看占用该端口的进程

格式:lsof -i:port port:端口号

2.杀死进程

格式:kill PID PID:进程的PID

3.示例

ksnowlv@ksnowlvdeMacBook-Pro~$lsof -i:80
COMMAND    PID    USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
com.apple  640 ksnowlv   13u  IPv4 0x5c463434d35d8295      0t0  TCP 10.68.187.236:56236->117.79.146.98:http (ESTABLISHED)
com.apple  640 ksnowlv   15u  IPv4 0x5c463434d3534295      0t0  TCP 10.68.187.236:56237->117.79.146.98:http (ESTABLISHED)
com.apple  640 ksnowlv   16u  IPv4 0x5c463434d3534295      0t0  TCP 10.68.187.236:56237->117.79.146.98:http (ESTABLISHED)
com.apple  640 ksnowlv   17u  IPv4 0x5c463434cb37aa7d      0t0  TCP 10.68.187.236:56239->117.79.146.98:http (ESTABLISHED)
com.apple  640 ksnowlv   19u  IPv4 0x5c463434cb369a7d      0t0  TCP 10.68.187.236:56238->202.102.85.61:http (ESTABLISHED)
com.apple  640 ksnowlv   20u  IPv4 0x5c463434d35d8295      0t0  TCP 10.68.187.236:56236->117.79.146.98:http (ESTABLISHED)
com.apple  640 ksnowlv   22u  IPv4 0x5c463434cb37aa7d      0t0  TCP 10.68.187.236:56239->117.79.146.98:http (ESTABLISHED)
com.apple  640 ksnowlv   24u  IPv4 0x5c463434cb369a7d      0t0  TCP 10.68.187.236:56238->202.102.85.61:http (ESTABLISHED)
com.apple  640 ksnowlv   26u  IPv4 0x5c463434cb369295      0t0  TCP 10.68.187.236:56242->103.245.222.134:http (ESTABLISHED)
com.apple  640 ksnowlv   28u  IPv4 0x5c463434d443b295      0t0  TCP 10.68.187.236:56241->117.79.146.98:http (ESTABLISHED)
com.apple  640 ksnowlv   30u  IPv4 0x5c463434d443b295      0t0  TCP 10.68.187.236:56241->117.79.146.98:http (ESTABLISHED)
com.apple  640 ksnowlv   31u  IPv4 0x5c463434cb369295      0t0  TCP 10.68.187.236:56242->103.245.222.134:http (ESTABLISHED)
AliWangwa 2170 ksnowlv   13u  IPv4 0x5c463434d35faa7d      0t0  TCP 10.68.187.236:56234->203.208.49.174:http (ESTABLISHED)
AliWangwa 2170 ksnowlv   15u  IPv4 0x5c463434d35faa7d      0t0  TCP 10.68.187.236:56234->203.208.49.174:http (ESTABLISHED)
ksnowlv@ksnowlvdeMacBook-Pro~$kill 2170
ksnowlv@ksnowlvdeMacBook-Pro~$kill 640
ksnowlv@ksnowlvdeMacBook-Pro~$lsof -i:80
ksnowlv@ksnowlvdeMacBook-Pro~$