Linux命令之ip
ip [ OPTIONS ] OBJECT { COMMAND | help }
这一条命令几乎包含了所有使用方法，其中
对象OBJECT={ link | addr | addrlabel | route | rule | neigh | ntable | tunnel | maddr | mroute | mrule | monitor | xfrm | token }
选项OPTIONS={ -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] | -h[uman-readable] | -iec | -f[amily] { inet | inet6 | ipx | dnet | link } | -o[neline] | -t[imestamp] | -b[atch] [filename] | -rc[vbuf] [size] }
不过COMMAND比较长，请使用’ip OBJECT help’查看。
剩下的如下显示：
ip [-force] -batch filename
ip是iproute2软件包里面的一个强大的网络配置工具，用来显示或操作路由、网络设备、策略路由和隧道，它能够替代一些传统的网络管理工具，例如ifconfig、route等。用ip配置的设备信息，大部分会在设备重启后还原，如果想永久保留配置，请尽量进入配置文件修改。
(1).对象
link 网络设备
address 设备上的协议（IP或IPv6）地址
addrlabel 协议地址选择的标签配置
neighbour ARP或NDISC缓存条目
route 路由表条目
rule 路由策略数据库中的规则
maddress 组播地址
mroute 组播路由缓存条目
tunnel IP隧道
xfrm IPSec协议框架
所有对象的名称可以用完整或缩写形式书写，例如address可以缩写成addr或只是a。
(2).选项
-V，-Version 显示指令版本信息
-s,-stats,statistics 输出详细信息
-h,-human,-human-readable 输出人类可读的统计信息和后缀
-iec 以IEC标准单位打印人类可读速率（例如1K=1024）
-f,-family <FAMILY> 指定要使用的协议族。协议族标识可以是inet、inet6、ipx、dnet或link之一。如果此选项不存在，则从其他参数中推测协议族。如果命令行的其余部分没有提供足够的信息来推测该族，则ip会退回到默认值，通常是inet或any。link是一个特殊的系列标识符，表示不涉及网络协议。
-4 –family inet的快捷方式
-6 –family inet6的快捷方式
-0 –family link的快捷方式
-o,-oneline 将每条记录输出到一行，用’\’字符替换换行符。
-r,-resolve 使用系统名称解析程序来打印DNS名称而不是主机地址。
(3).实例
注意：以下介绍的ip命令都是临时配置，一但重启就会还原，如"service network restart"
查看所有IP地址
ip a/addr/address
ip a/addr/address sh/show
查看指定IP地址
ip a/addr/address sh/show dev eth1
ip a/addr/address sh/show eth1
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.129/24 brd 192.168.78.255 scope global eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
[root@CentOS6 桌面]# ip a sh eth1
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.129/24 brd 192.168.78.255 scope global eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
增加或删除IP地址
ip a/addr/address add 192.168.78.130/24 dev eth1
ip a/addr/address del/delete 192.168.78.130/24 dev eth1
[root@CentOS6 桌面]# ip a add 192.168.78.130/24 dev eth1
[root@CentOS6 桌面]# ip a sh eth1
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.129/24 brd 192.168.78.255 scope global eth1
inet 192.168.78.130/24 scope global secondary eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
[root@CentOS6 桌面]# ip a del 192.168.78.130/24 dev eth1
[root@CentOS6 桌面]# ip a sh eth1
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.129/24 brd 192.168.78.255 scope global eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
删除eth1所有IP地址
ip a flush dev eth1
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.129/24 brd 192.168.78.255 scope global eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
[root@CentOS6 桌面]# ip a add 192.168.78.130/24 dev eth1
[root@CentOS6 桌面]# ip a add 192.168.78.131/24 dev eth1
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.129/24 brd 192.168.78.255 scope global eth1
inet 192.168.78.130/24 scope global secondary eth1
inet 192.168.78.131/24 scope global secondary eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
[root@CentOS6 桌面]# ip a flush dev eth1
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
删除eth1的所有IPv4的IP地址
ip -4 a flush dev eth1
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.129/24 brd 192.168.78.255 scope global eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
[root@CentOS6 桌面]# ip a add 192.168.78.130/24 dev eth1
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.129/24 brd 192.168.78.255 scope global eth1
inet 192.168.78.130/24 scope global secondary eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
[root@CentOS6 桌面]# ip -4 a flush dev eth1
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
查看网络设备信息
ip link sh/show/l/list/ls
ip link sh/show/l/ls/lsit eth1
ip link sh/show/l/ls/list dev eth1
[root@CentOS6 桌面]# ip link l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
[root@CentOS6 桌面]# ip link l eth1
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
[root@CentOS6 桌面]# ip link l dev eth1
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
停止与激活网络设备
ip link set dev eth1 down
ip link set dev eth1 up
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.133/24 brd 192.168.78.255 scope global eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
[root@CentOS6 桌面]# ip link set dev eth1 down
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.133/24 brd 192.168.78.255 scope global eth1
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
[root@CentOS6 桌面]# ip link set dev eth1 up
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
[root@CentOS6 桌面]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:42:9f:ce brd ff:ff:ff:ff:ff:ff
inet 192.168.78.133/24 brd 192.168.78.255 scope global eth1
inet6 fe80::20c:29ff:fe42:9fce/64 scope link
valid_lft forever preferred_lft forever
查看路由表
ip r/ro/route
ip r/ro/route sh/show
ip r/ro/route sh/show dev eth1
[root@CentOS6 桌面]# ip r
192.168.78.0/24 dev eth2 proto kernel scope link src 192.168.78.132 metric 1
192.168.78.0/24 dev eth1 proto kernel scope link src 192.168.78.133 metric 1
default via 192.168.78.2 dev eth1 proto static
[root@CentOS6 桌面]# ip r sh dev eth1
192.168.78.0/24 proto kernel scope link src 192.168.78.133 metric 1
default via 192.168.78.2 proto static
添加或删除路由
ip r/ro/route add 192.168.79.0/24 dev eth1
ip r/ro/route d/del/delete 192.168.79.0/24
ip r/ro/route d/del/delete 192.168.79.0/24 dev eth1
[root@CentOS6 桌面]# ip r
192.168.78.0/24 dev eth2 proto kernel scope link src 192.168.78.132 metric 1
192.168.78.0/24 dev eth1 proto kernel scope link src 192.168.78.133 metric 1
default via 192.168.78.2 dev eth1 proto static
[root@CentOS6 桌面]# ip r add 192.168.79.0/24 dev eth1
[root@CentOS6 桌面]# ip r
192.168.79.0/24 dev eth1 scope link
192.168.78.0/24 dev eth2 proto kernel scope link src 192.168.78.132 metric 1
192.168.78.0/24 dev eth1 proto kernel scope link src 192.168.78.133 metric 1
default via 192.168.78.2 dev eth1 proto static
[root@CentOS6 桌面]# ip r d 192.168.79.0/24 dev eth1
[root@CentOS6 桌面]# ip r
192.168.78.0/24 dev eth2 proto kernel scope link src 192.168.78.132 metric 1
192.168.78.0/24 dev eth1 proto kernel scope link src 192.168.78.133 metric 1
default via 192.168.78.2 dev eth1 proto static
默认路由的删除、添加与修改
ip r/ro/route d/del/delete default
ip r/ro/route add default via 192.168.78.1
ip r/ro/route chg/change default via 192.168.78.2
[root@CentOS6 桌面]# ip r
192.168.78.0/24 dev eth1 proto kernel scope link src 192.168.78.133 metric 1
192.168.78.0/24 dev eth2 proto kernel scope link src 192.168.78.132 metric 1
default via 192.168.78.2 dev eth1 proto static
[root@CentOS6 桌面]# ip r d default
[root@CentOS6 桌面]# ip r
192.168.78.0/24 dev eth1 proto kernel scope link src 192.168.78.133 metric 1
192.168.78.0/24 dev eth2 proto kernel scope link src 192.168.78.132 metric 1
[root@CentOS6 桌面]# ip r add default via 192.168.78.1
[root@CentOS6 桌面]# ip r
192.168.78.0/24 dev eth1 proto kernel scope link src 192.168.78.133 metric 1
192.168.78.0/24 dev eth2 proto kernel scope link src 192.168.78.132 metric 1
default via 192.168.78.1 dev eth1
[root@CentOS6 桌面]# ip r chg default via 192.168.78.2
[root@CentOS6 桌面]# ip r
192.168.78.0/24 dev eth1 proto kernel scope link src 192.168.78.133 metric 1
192.168.78.0/24 dev eth2 proto kernel scope link src 192.168.78.132 metric 1
default via 192.168.78.2 dev eth1
查看ARP表
ip n/neigh/neighbuor sh/show
[root@CentOS6 桌面]# ip n
192.168.78.2 dev eth1 lladdr 00:50:56:f0:d4:05 REACHABLE
192.168.78.2 dev eth2 lladdr 00:50:56:f0:d4:05 STALE
192.168.78.254 dev eth2 lladdr 00:50:56:f5:45:c8 STALE
参考：
https://blog.csdn.net/freeking101/article/details/68939059
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