Python 获取主机ip与hostna

->基础环境

linux：ubuntu 16.04

python ； 2.7

->修改hostname

1:$sudo hostname 2tong-slavetwo

2:$sudo vi /etc/hostname

   2tong-slavetwo

3:$sudo vi /etc/hosts

   127.0.0.1 localhost 2tong-slavetwo

   127.0.1.1 2tong-slavetwo

->Python 环境下输出ip hostname

>>>import Socket

>>>hostname = socket.gethostname()

>>>print hostname

2tong-slavetwo

>>>ip = socket.gethostbyname(hostname)

>>>print ip

127.0.0.1

>>>ipList = socket.gethostbyname_ex(name)

>>>print ipList

('localhost', ['2tong-slavetwo', '2tong-slavetwo'], ['127.0.0.1', '127.0.1.1']

->札记

import socket后，会从/etc/hostname中寻找hostname，而后前往/etc/hosts中查找ip