ip命令和iproute工具

Linux下的iproute是一组网络设置的利器！
ip命令则是头号命令；
命令格式：ip [options] OBJECT [ COMMAND [ ARGUMENTS ] ]
OPTIONS:
-s 统计信息
-f 指定协议族，协议族可以是 inet，inet6，link
－4, －6 使用inet，inet6协议族
－r DNS解析

OBJECT则是各种可操作网络元素，
link 网络设备； address IP（IPv6)地址；
neighbour ARP、NDISC缓存； route 路由表项；
rule 路由策略库中的规则； maddress 多播地址；
mroute 多播路由； tunnel IP隧道；
前四个字母即可代表OBJECT，address可以只写addr；
action是可以作用于OBJECTs的动作，如对于rule可以是show，delete或add；ARGUMENTS是命令的参数选项；

ip link 设备操作，包括对网络设备的set和show；
e.x.
ip link set dev eth0 up
ip link show
ip link show的显示输出如下，
设备号 设备名字 设备状态 MTU 队列方式
2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:e0:4c:8c:a4:51 brd ff:ff:ff:ff:ff:ff

ip addr ip地址操作，可以添加，删除和显示；

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