eth0:1

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 192.168.1.211
netmask 255.255.255.0
gateway 192.168.1.254

auto eth0:0
iface eth0:0 inet static
address 192.168.20.1
netmask 255.255.255.0

root@Gaby-UB11:/home/gabriel# /etc/init.d/networking restart * Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces
 * Reconfiguring network interfaces...                                          ssh stop/waiting
ssh start/running, process 8393
ssh stop/waiting
ssh start/running, process 8473
                                                                         [ OK ]
root@Gaby-UB11:/home/gabriel#

root@Gaby-UB11:/home/gabriel# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:25:b3:6a:10:cc
          inet addr:192.168.1.211  Bcast:0.0.0.0  Mask:255.255.255.0
          inet6 addr: fe80::225:b3ff:fe6a:10cc/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1138581 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1088242 errors:0 dropped:0 overruns:0 carrier:3
          collisions:0 txqueuelen:1000
          RX bytes:1291070818 (1.2 GB)  TX bytes:95946148 (95.9 MB)
          Interrupt:42

eth2      Link encap:Ethernet  HWaddr 00:26:5e:3d:57:5e
          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:16 Base address:0xc000

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:3850 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3850 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:272328 (272.3 KB)  TX bytes:272328 (272.3 KB)