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