操作系统的版本为centos7.5

使用系统自带的python版本

编写duankou.py

import socket

ip_port = ('192.168.122.136',9999)
sk = socket.socket()
sk.bind(ip_port)
sk.listen(5)
while True:
    print ('server waiting...')
    conn,addr = sk.accept()
    client_data = conn.recv(1024)
    print (str(client_data,'utf8'))
    conn.sendall(bytes('abc','utf8'))
    conn.close()

直接运行

python duankou.py 

netstat -tnlp|grep 9999