使用ip命令更改网卡名称

先查看一下网卡信息

root@pzghost:~# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:05:fe:5d brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ether 00:0c:29:05:fe:67 brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
    link/ether 06:65:4e:3b:8d:ee brd ff:ff:ff:ff:ff:ff
就修改eth1吧, 将eth1修改成lan, 看到state DOWN吗? 这个eth1接口的状态是down，也只有在down的情况下才可以修改, 先up修改试试，看看是不是一定要down

root@pzghost:~# ip link set eth1 up

root@pzghost:~# ip link set eth1 name lan
RTNETLINK answers: Device or resource busy
耶，提示设备或资源忙, 都给说了要down吧还不信

root@pzghost:~# ip link set eth1 down
root@pzghost:~# ip link show eth1
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ether 00:0c:29:05:fe:67 brd ff:ff:ff:ff:ff:ff
又down了，改名咯

root@pzghost:~# ip link set eth1 name lan
root@pzghost:~# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:05:fe:5d brd ff:ff:ff:ff:ff:ff
3: lan: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ether 00:0c:29:05:fe:67 brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
    link/ether 06:65:4e:3b:8d:ee brd ff:ff:ff:ff:ff:ff
名字是修改好了，，，但是down可不行啊，，，up一下吧

root@pzghost:~# ip link set lan up
root@pzghost:~# ip link show lan 
3: lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 00:0c:29:05:fe:67 brd ff:ff:ff:ff:ff:ff
http://www/uc/myshow/blog/misc/gif/E___7395ZH00SIGG.gifIP命令" TITLE="强大的Linux IP命令" />还UNKNOWN， 就当up了吧

提示: 修改接口名是一个需要down,up的过程，可能会导致该接口上的路由等信息的消失, 重新配置消失的信息。

root@pzghost:~# ip link
add     delete  help    set     show   
root@pzghost:~# ip link help
Usage: ip link add [link DEV] [ name ] NAME
                   [ txqueuelen PACKETS ]
                   [ address LLADDR ]
                   [ broadcast LLADDR ]
                   [ mtu MTU ]
                   type TYPE [ ARGS ]
       ip link delete DEV type TYPE [ ARGS ]

       ip link set { dev DEVICE | group DEVGROUP } [ { up | down } ]
                          [ arp { on | off } ]
                          [ dynamic { on | off } ]
                          [ multicast { on | off } ]
                          [ allmulticast { on | off } ]
                          [ promisc { on | off } ]
                          [ trailers { on | off } ]
                          [ txqueuelen PACKETS ]
                          [ name NEWNAME ]
                          [ address LLADDR ]
                          [ broadcast LLADDR ]
                          [ mtu MTU ]
                          [ netns PID ]
                          [ netns NAME ]
                          [ alias NAME ]
                          [ vf NUM [ mac LLADDR ]
                                   [ vlan VLANID [ qos VLAN-QOS ] ]
                                   [ rate TXRATE ] ]
                          [ master DEVICE ]
                          [ nomaster ]
       ip link show [ DEVICE | group GROUP ]

TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | can | bridge }