http://askubuntu.com/questions/54441/how-to-configure-two-nic-for-dns-resolv-conf-how-to-eth0-dns-forwards-to-eth1
/etc/resolvconf/resolv.conf.d/head nameserver <ip_of_nameserver>resolvconf -uor
echo "nameserver 168.126.63.1" | sudo resolvconf -a em1.inet