根据端口杀进程

#!/bin/bash

#第 1 个参数为端口，默认为 8761
port=${1-8761}
echo "0.杀掉端口[$port]对应的进程"

#查询端口相关的进程信息，返回字符串
result=$(lsof -i:"$port") || exit
echo "1.根据端口查询进程: $result"

#将字符串转换为数组
array=($result)

#获取第 10 个参数为进程号
pid=${array[10]}
echo "2.根据进程查询结果取得进程号:$pid"

#如果取得进程号则杀掉
if [ -n "$pid" ]; then
  echo "3.杀掉进程$pid"
  kill -9 $pid
fi

$ lsof -i:8761
COMMAND   PID  USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
java      398 xiayx    9u  IPv6 0x20945d935f29749b      0t0  TCP localhost:8761->localhost:63519 (ESTABLISHED)
java      398 xiayx   10u  IPv6 0x20945d935f29439b      0t0  TCP localhost:63346->localhost:8761 (ESTABLISHED)
java      398 xiayx   14u  IPv6 0x20945d935e57723b      0t0  TCP *:8761 (LISTEN)
java      398 xiayx   22u  IPv6 0x20945d935f2955fb      0t0  TCP localhost:8761->localhost:63346 (ESTABLISHED)
java    41642 xiayx  149u  IPv6 0x20945d935f296e7b      0t0  TCP localhost:63519->localhost:8761 (ESTABLISHED)

#赋予执行权限
$ chmod 777 ./kill_by_port.sh
#杀掉 8080 对应的进程
$ ./kill_by_port.sh 8080