04 May 2013

Screw yourself with IFCONFIG



If you does not know what in the world is  ifconfig !    SCREW YOURSELF!   for your kind information  ifconfig  is a network interface configuration tool.

Open Terminal:
ifconfig
For  Windows, command will be slightly different:
ipconfig
Output:
eth0      Link encap:Ethernet  HWaddr 00:1d:60:06:cc:2d  
          UP BROADCAST 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:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

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:852 errors:0 dropped:0 overruns:0 frame:0
          TX packets:852 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:64720 (64.7 KB)  TX bytes:64720 (64.7 KB)

Show all interfaces:
ifconfig -a

Display information for eth0 interface:
ifconfig eth0


The fun begin..

Take down the eth0 interface:
ifconfig eth0 down
This will deactivate eth0.

Change the IP address of eth0:
ifconfig eth0 111.111.0.0

Change the hardware address of eth0:
ifconfig eth0 hw ether aa:aa:aa:aa:aa:aa

Bring up the interface eth0:
ifconfig eth0 up

Now run ifconfig..
ifconfig eth0
Output:
eth0      Link encap:Ethernet  HWaddr aa:aa:aa:aa:aa
          inet addr:111.111.0.0  Bcast:255.255.255.255  Mask:0.0.0.0
          UP BROADCAST 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:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

These are few example of ifconfig. more option and argument can be found in man page.
man ifconfig