[lug] local network

[David]

   lo        Link encap:Local Loopback  
             inet addr:127.0.0.1  Mask:255.0.0.0
             UP LOOPBACK RUNNING  MTU:3924  Metric:1
             RX packets:86 errors:0 dropped:0 overruns:0 frame:0
             TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
             collisions:0 txqueuelen:0 

I have just noticed that my inet addr is 127.0.0.1 on each machine; is
that the address that I need to change, how do I do it?