Linux Shell Scripting Cookbook - Third Edition

How to do it...

1. List the current network interface configuration:

        $ ifconfig 
        lo        Link encap:Local Loopback 
        inet addr:127.0.0.1  Mask:255.0.0.0 
        inet6addr: ::1/128 Scope:Host 
           UP LOOPBACK RUNNING  MTU:16436  Metric:1 
           RX packets:6078 errors:0 dropped:0 overruns:0 frame:0 
           TX packets:6078 errors:0 dropped:0 overruns:0 carrier:0 
        collisions:0 txqueuelen:0 
           RX bytes:634520 (634.5 KB)  TX bytes:634520 (634.5 KB) 
        wlan0     Link encap:EthernetHWaddr 00:1c:bf:87:25:d2 
        inet addr:192.168.0.82  Bcast:192.168.3.255  Mask:255.255.252.0 
        inet6addr: fe80::21c:bfff:fe87:25d2/64 Scope:Link 
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1 
           RX packets:420917 errors:0 dropped:0 overruns:0 frame:0 
           TX packets:86820 errors:0 dropped:0 overruns:0 carrier:0 
 collisions:0 ...