new-answer-diag

jarvis@jarvis-Inspiron-5558:~$ ifconfig |grep inet
          inet addr:172.17.0.1  Bcast:0.0.0.0  Mask:255.255.0.0
          inet addr:10.42.75.91  Bcast:10.42.75.255  Mask:255.255.255.0
          inet6 addr: fe80::2247:47ff:fec5:ec21/64 Scope:Link
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          inet addr:10.42.240.158  Bcast:10.42.240.255  Mask:255.255.255.0
          inet6 addr: fe80::e6f8:9cff:feb7:e017/64 Scope:Link
jarvis@jarvis-Inspiron-5558:~$ sudo dhclient wlan0
[sudo] password for jarvis:
RTNETLINK answers: File exists
jarvis@jarvis-Inspiron-5558:~$ sudo dhclient eth0
^Cjarvis@jarvis-Inspiron-5558:~$ ifconfig |grep inet
          inet addr:172.17.0.1  Bcast:0.0.0.0  Mask:255.255.0.0
          inet addr:10.42.75.91  Bcast:10.42.75.255  Mask:255.255.255.0
          inet6 addr: fe80::2247:47ff:fec5:ec21/64 Scope:Link
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          inet addr:10.42.240.158  Bcast:10.42.240.255  Mask:255.255.255.0
          inet6 addr: fe80::e6f8:9cff:feb7:e017/64 Scope:Link