1. View All Network Setting
   ifconfig

2. Display Information of All Network Interfaces
   ifconfig -a

3. View Network Settings of Specific Interface
   ifconfig eth0

4. Enable an Network Interface
   ifconfig eth0 up
   ifup eth0

5. Disable an Network Interface
   ifconfig eth0 down
   ifdown eth0

6. How to Assign a IP Address to Network Interface
   ifconfig eth0 172.16.25.125

7. How to Assign a Netmask to Network Interface
   ifconfig eth0 netmask 255.255.255.224

8. How to Assign a Broadcast to Network Interface
   ifconfig eth0 broadcast 172.16.25.63

9. How to Assign a IP, Netmask and Broadcast to Network Interface
   ifconfig eth0 172.16.25.125 netmask 255.255.255.224 broadcast 172.16.25.63

10. How to Change MTU for an Network Interface
    ifconfig eth0 mtu 1000

11. How to Enable / Disable  Promiscuous Mode
    ifconfig eth0 promisc
    ifconfig eth0 -promisc

12. How to Change the MAC address of Network Interface
    ifconfig eth0 hw ether AA:BB:CC:DD:EE:FF