$ ifconfig
eth0      Link encap:Ethernet  HWaddr a0:48:1c:c1:c6:31  
          inet6 addr: ::a248:1cff:fec1:c631/64 Scope:Global
          inet6 addr: ::183b:d7bd:7598:1375/64 Scope:Global
          inet6 addr: fe80::a248:1cff:fec1:c631/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:69492 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5066 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:8923819 (8.9 MB)  TX bytes:1263179 (1.2 MB)

eth0:avahi Link encap:Ethernet  HWaddr a0:48:1c:c1:c6:31  
          inet addr:169.254.7.209  Bcast:169.254.255.255  Mask:255.255.0.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1

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:22386 errors:0 dropped:0 overruns:0 frame:0
          TX packets:22386 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2423387 (2.4 MB)  TX bytes:2423387 (2.4 MB)

wlan0     Link encap:Ethernet  HWaddr 68:17:29:aa:93:03  
          inet addr:192.168.0.8  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: ::6a17:29ff:feaa:9303/64 Scope:Global
          inet6 addr: ::ade7:e9f:b9fb:efa8/64 Scope:Global
          inet6 addr: fe80::6a17:29ff:feaa:9303/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:226095 errors:0 dropped:0 overruns:0 frame:0
          TX packets:124085 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:110536979 (110.5 MB)  TX bytes:23544896 (23.5 MB)

$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp