Leia man 5 interfaces
, que diz, em parte:
NAME
/etc/network/interfaces - network interface configuration for ifup and ifdown
DESCRIPTION
/etc/network/interfaces contains
network interface configuration information
for the ifup(8) and ifdown(8) commands.
This is where you configure how your system is connected to the network.
Em seguida, com cuidado (com cópia de backup manual), edite o arquivo. Leia man 8 ifup
e man 8 ifdown
também.