To determine a computer's IP address and network interface in linux:

• ifconfig

You will see something like:

• 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:6658055 errors:0 dropped:0 overruns:0 frame:0
            TX packets:6658055 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0 
            RX bytes:587372914 (587.3 MB)  TX bytes:587372914 (587.3 MB)
  
  wlan1     Link encap:Ethernet  HWaddr 48:5d:60:75:58:90  
            inet addr:10.0.129.17  Bcast:10.0.129.255  Mask:255.255.254.0
            inet6 addr: fe80::4a5d:60ff:fe75:5890/64 Scope:Link
            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
            RX packets:101983 errors:0 dropped:0 overruns:0 frame:0
            TX packets:37244 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000 
            RX bytes:49326141 (49.3 MB)  TX bytes:7588044 (7.5 MB)

• the network interface for the wireless card is wlan1

• the IP address of the computer is 10.0.129.17