?@?:~$ cat /etc/network/interfaces

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp

auto eth0:0
iface eth0:0 inet static
  address 192.168.0.2
  netmask 255.255.255.0

?@?:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:27:0e:02:09:af
          inet addr:192.168.0.203  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::227:eff:fe02:9af/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:969641 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3761538 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:228580445 (228.5 MB)  TX bytes:520167321 (520.1 MB)
          Interrupt:44 Base address:0x6000

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:6864 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6864 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:358606 (358.6 KB)  TX bytes:358606 (358.6 KB)