Ubuntu / Debian IP Configuration Files:

3/19/2013 10:38:00 PM    

File: /etc/network/interfaces

Static IP example:
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
        address 208.88.34.106
        netmask 255.255.255.248
        broadcast 208.88.34.111
        network 208.88.34.104
        gateway 208.88.34.110
Dynamic IP (DHCP) example:
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto eth1
iface eth1 inet dhcp

auto eth2
iface eth2 inet dhcp

auto ath0
iface ath0 inet dhcp

auto wlan0
iface wlan0 inet dhcp