不使用外部程序包即可获取所有NIC的IP地址

Question

I want to list ip address of all NICs connected to my machine (without using any external packages)

import socket
print socket.gethostbyname_ex(socket.gethostname())[2]

This code is working fine for Windows but on my Linux machine it outputs 127.0.1.1

How do I change above code to make it work on Linux ?

---

The content of /etc/hostname is

machine-name

And the content of /etc/hosts is

127.0.0.1 localhost 
127.0.1.1 machine-name 

# The following lines are desirable for IPv6 capable hosts 
::1 ip6-localhost ip6-loopback 
fe00::0 ip6-localnet 
ff00::0 ip6-mcastprefix 
ff02::1 ip6-allnodes 
ff02::2 ip6-allrouters

Answer 1

I think your issue is the content of /etc/hosts , which is what socket is using to match the hostname to the IP addresses.

If you change your /etc/hosts to the following, you should see both 127.0.0.1 and 127.0.1.1 on the list:

127.0.0.1 localhost machine-name
127.0.1.1 machine-name

# And of course your IPv6 settings below...

Any IP addresses which aren't in that file won't appear in the results of socket.gethostbyname_ex() .