# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0f:1f:e1:ec:2e
          inet addr:192.168.6.49  Bcast:192.168.6.255  Mask:255.255.255.0
          inet6 addr: fe80::20f:1fff:fee1:ec2e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:22340 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11810 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:8801669 (8.8 MB)  TX bytes:2434090 (2.4 MB)
          Interrupt:16

eth1      Link encap:Ethernet  HWaddr 00:0a:5e:48:b1:72
          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)
          Interrupt:18 Base address:0x2f80

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:1450 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1450 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:169520 (169.5 KB)  TX bytes:169520 (169.5 KB)


# /etc/network/interfaces
auto lo
iface lo inet loopback