/etc/network/interfaces:
# 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
# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
script grep
## map eth1
# The primary network interface
#auto eth1
iface eth1 inet dhcp
#auto eth0
iface eth0 inet dhcp
iface eth2 inet dhcp
auto eth1
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