[root@tecmint ~]# vi etc sysconfig/network-scripts/ifcfg-eth0
or etc network/interfaces
# etc init.d/networking restart
# ip addr add 192.168.50.5 dev eth1
# ip addr show
# ip addr del 192.168.50.5/24 dev eth1
# ip link set eth1 down
# ip route show
# ip route add 10.10.20.0/24 via 192.168.50.100 dev eth0
# ip route del 10.10.20.0/24
# vi etc sysconfig/network-scripts/route-eth0
10.10.20.0/24 via 192.168.50.100 dev eth0
or
$ sudo vi etc network/interfaces
# etc init.d/network restart
# ip route add default via 192.168.50.100
原文：
http://www.tecmint.com/ip-command-examples/
