Network configuration for Debian

Ip from dhcp

#/etc/network/interfaces
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp

For a static IP

#/etc/network/interfaces
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
address 10.8.0.100
netmask 255.255.255.0
gateway 10.8.0.1
broadcast 10.8.0.255