$ ifconfig # ifconfig [network card name] IP MASK $ sudo ifconfig eth0 10.30.3.99 netmask 255.255.255.0 $ ip r $ route # ip r a default via GATEWAY $ ip r a default via 10.30.3.1 $ ping www.baidu.com
$ ifconfig # ifconfig [network card name] IP MASK $ sudo ifconfig eth0 10.30.3.99 netmask 255.255.255.0 $ ip r $ route # ip r a default via GATEWAY $ ip r a default via 10.30.3.1 $ ping www.baidu.com