Comando ip

 ip link set eth0 down/up
 ip addr add/del dev eth0 local 192.168.2.x/24
 ip route add dev eth0 to 10.0.0.0/8 src 192.168.2.x via 192.168.2.1
 ip route add dev eth0 to 0.0.0.0/0 via 192.168.2.20