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/etc/network/interfaces
auto lo iface lo inet loopback auth eth0 iface eth0 inet static address 172.29.0.11 netmask 255.255.255.0 gateway 172.29.0.1 auto eth1 iface eth1 inet static address 131.193.35.155 netmask 255.255.255.0 gateway 131.193.25.1