output ubuntu12.04 ifconfig -a

eth0      Link encap:Ethernet  HWaddr 90:2b:34:8d:d9:2e
          inet6 addr: fe80::922b:34ff:fe8d:d92e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:34 errors:0 dropped:0 overruns:0 frame:0
          TX packets:499 errors:0 dropped:0 overruns:0 carrier:1
          collisions:0 txqueuelen:1000
          RX bytes:6829 (6.8 KB)  TX bytes:114992 (114.9 KB)
          Interrupt:44

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:16436  Metric:1
          RX packets:906 errors:0 dropped:0 overruns:0 frame:0
          TX packets:906 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:77536 (77.5 KB)  TX bytes:77536 (77.5 KB)

usb0      Link encap:Ethernet  HWaddr 2e:12:19:d9:8d:4d
          inet addr:192.168.42.236  Bcast:192.168.42.255  Mask:255.255.255.0
          inet6 addr: fe80::2c12:19ff:fed9:8d4d/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:14833 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12658 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:20790666 (20.7 MB)  TX bytes:1542994 (1.5 MB)