Name or service not known

Question

I have been trying to get the ipaddress of the person who logged into the machine using the below code but I get a error.

>>> import socket
>>> socket.gethostbyname_ex(socket.gethostname())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
socket.gaierror: [Errno -2] Name or service not known

The same code works in other linux box. Not sure I fix it.

Answer 1

Error has occurred just because of not setting up hostname properly. Set the hostname at three different places, which are in -

1. /etc/hostname
2. /etc/hosts
3. run command $ hostname

then logout and login again. You are done.