From Rost Lab Open


# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet manual
	# The trick here is that the interface is already configured during initramdisk time. Here we only want to run /etc/network/if-*.d scripts to bring up NFS mounts for example, but NOT to configure the interface itself.