====== ifconfig ======

  * [[Networking]]
  * [[ifenslave]]
  * [[ifup]]
  * [[ip]]
  * [[route]]

Syntax:

  * ''ifconfig [-v] [-a] [-s] interface''
  * ''ifconfig [-v] interface [aftype] options | address ...''

Options:

  * **-a** - display all interfaces that are available, even if down
  * **-s [interface]** - display a short list (similar to ''netstat -i'')
  * **<interface>** - display details of interface
  * **<interface> up** - activate an interface
  * **<interface> down** - deactivate an interface
  * **<interface> <address>** - set the IP address to this value
  * **<interface> broadcast <address>** - set the protocol broadcast address
  * **<interface> netmask <address>** - set the IP network mask
  * **<interface> hw <class> <address>** - set the hardware address

** Display all interfaces that are active **

This does not necessarily mean that an interface has any addresses attached to it. Only that it is available and able to set something.

<code>
ifconfig
</code>

** Bring an interface online **

<code>
ifconfig eth0 up
</code>

** Display information about the interface **

<code>
ifconfig eth0
</code>

** Set the IP address of an interface **

<code>
ifconfig eth0 192.168.1.1
</code>

Note that if you don't set a broadcast or netmask address when setting the ip (fex: ''ifconfig eth0 192.168.1.1''), then ''ifconfig'' will set them to the default values. Broadcast would be ''192.168.1.255'' and netmask would be ''255.255.255.0''.

** Remove the IP address of an interface **

<code>
ifconfig eth0 0.0.0.0
</code>

You can run ''ifconfig eth0 0'' as well.

** Set the IP address and broadcast of an interface **

<code>
ifconfig eth0 192.168.1.1 broadcast 192.168.1.255
</code>

** Set the IP address, broadcast and netmask of an interface **

<code>
ifconfig eth0 192.168.1.1 broadcast 192.168.1.255 netmask 255.255.255.0
</code> 

** Set the MAC address of an interface **

<code>
ifconfig eth0 hw ether 00:16:3E:24:13:59
</code>