eth0      Link encap:Ethernet  HWaddr 7c:05:07:f7:bd:ce
          inet addr:192.168.216.35  Bcast:192.168.216.255  Mask:255.255.255.0
          inet6 addr: fe80::7e05:7ff:fef7:bdce/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:48 errors:0 dropped:0 overruns:0 frame:0
          TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4006 (4.0 KB)  TX bytes:2339 (2.3 KB)
          Interrupt:19

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:24 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1200 (1.2 KB)  TX bytes:1200 (1.2 KB)

wlan0     Link encap:Ethernet  HWaddr 0c:84:dc:0b:c8:0f
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

bodhi@bodhi:~$ sudo ifdown wlan0
ifdown: interface wlan0 not configured