IFCONFIG

The command ifconfig -a shows all interfaces with their parameters. The output should be:

eth0      Link encap:Ethernet  HWaddr ??:??:??:??:??:??
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:10588 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12632 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1820173 (1.7 MiB)  TX bytes:2125389 (2.0 MiB)
          Interrupt:5

eth1      Link encap:Ethernet  HWaddr ??:??:??:??:??:??
          UP BROADCAST RUNNING ALLMULTI MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:12 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:4 Base address:0x1000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:852 (852.0 B)  TX bytes:852 (852.0 B)

vlan0     Link encap:Ethernet  HWaddr ??:??:??:??:??:??
          inet addr:10.0.0.10 Bcast:10.0.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING ALLMULTI MULTICAST  MTU:1500  Metric:1
          RX packets:10590 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12608 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1629781 (1.5 MiB)  TX bytes:2037798 (1.9 MiB)

vlan1     Link encap:Ethernet  HWaddr ??:??:??:??:??:??
          inet addr:192.168.10.10  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:12474 (12.1 KiB)

vlan2     Link encap:Ethernet  HWaddr ??:??:??:??:??:??
          inet addr:192.168.20.1  Bcast:192.168.20.255  Mask:255.255.255.0
          UP BROADCAST RUNNING 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:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

vlan3     Link encap:Ethernet  HWaddr ??:??:??:??:??:??
          inet addr:192.168.30.1  Bcast:192.168.30.255  Mask:255.255.255.0
          UP BROADCAST RUNNING 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:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

vlan4     Link encap:Ethernet  HWaddr ??:??:??:??:??:??
          inet addr:192.168.40.1  Bcast:192.168.40.255  Mask:255.255.255.0
          UP BROADCAST RUNNING 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:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)