linux/Centos下查看网卡Mac地址,输入命令:
#ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:e4:56:2E:D8:20
00:e4:56:2E:D8:20即是你的MAC地址。
linux/Centos下以root权限临时修改MAC地址:
1)闭网卡设备
/sbin/ifconfig eth0 down
2)修改MAC地址
/sbin/ifconfig eth0 hw ether MAC地址
3)重启网卡
/sbin/ifconfig eth0 up
4)查看修改是否生效:
ifconfig eth0 | grep HWaddr
注意:上述修改MAC地址只是暂时的,系统重启后,系统会恢复原物理MAC地址。
Linux/Centos下如何永久修改网卡MAC地址
网上有很多关于linux下修改MAC地址的方法,经过测试,最终解决方法如下:
误区一:
#ifconfig eth0 down /*禁掉eth0网卡,这里以eth0网卡为例*/
#ifconfig eth0 hw ether 00:AA:BB:CC:DD:EE /*修改eth0网卡的MAC地址*/
#ifconfig eth0 up /*重新启动eth0网卡*/
然后重新启动主机。
结论:按照这种方法修改MAC地址,重新启动主机系统后,MAC地址会自动还原。
误区二:
#ifconfig eth0 down
#cd /etc/sysconfig/network-scripts
#vi ifcfg-eth0
修改其中的"HWADDR=xx:xx:xx:xx:xx:xx"
#ifconfig eth0 up
#service network start
结论:按照这种方法修改MAC地址后将无法启用网络,会出现如下提示:
“Bringing up interface eth0: Device eth0 has different MAC address than expected,ignoring.”
在linux/Centos环境下将修改后的MAC地址永久保存的正确的步骤如下:
#ifconfig eth0 down
#cd /etc/sysconfig/network-scripts
#vi ifcfg-eth0
修改其中的"HWADDR=xx:xx:xx:xx:xx:xx"为"MACADDR=xx:xx:xx:xx:xx:xx"
#ifconfig eth0 up
#service network start
注意:关键词HWADDR和MACADDR是有区别的。
最后附ifconfig命令格式:
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ifconfig
--help Usage: ifconfig
[-a] [-v] [-s] <interface> [[<AF>] <address>] [add
<address>[/<prefixlen>]] [del
<address>[/<prefixlen>]] [[-]broadcast
[<address>]] [[-]pointopoint [<address>]] [netmask
<address>] [dstaddr <address>] [tunnel <address>] [outfill
<NN>] [keepalive <NN>] [hw
<HW> <address>] [metric <NN>] [mtu <NN>] [[-]trailers]
[[-]arp] [[-]allmulti] [multicast]
[[-]promisc] [mem_start
<NN>] [io_addr <NN>] [irq <NN>] [media <type>] [txqueuelen
<NN>] [[-]dynamic] [up|down]
... <HW>=Hardware
Type. List
of possible hardware types: loop
(Local Loopback) slip (Serial Line IP) cslip (VJ Serial Line IP) slip6
(6-bit Serial Line IP) cslip6 (VJ 6-bit Serial Line IP) adaptive (Adaptive Serial Line IP) strip
(Metricom Starmode IP) ash (Ash) ether (Ethernet) tr
(16/4 Mbps Token Ring) tr (16/4 Mbps Token Ring (New)) ax25 (AMPR AX.25) netrom
(AMPR NET/ROM) rose (AMPR ROSE) tunnel (IPIP Tunnel) ppp
(Point-to-Point Protocol) hdlc ((Cisco)-HDLC) lapb (LAPB) arcnet
(ARCnet) dlci (Frame Relay DLCI) frad (Frame Relay Access Device) sit
(IPv6-in-IPv4) fddi (Fiber Distributed Data Interface) hippi (HIPPI) irda
(IrLAP) ec (Econet) x25 (generic X.25) infiniband
(InfiniBand) <AF>=Address
family. Default: inet List
of possible address families: unix
(UNIX Domain) inet (DARPA Internet) inet6 (IPv6) ax25
(AMPR AX.25) netrom (AMPR NET/ROM) rose (AMPR ROSE) ipx
(Novell IPX) ddp (Appletalk DDP) ec (Econet) ash
(Ash) x25 (CCITT X.25)
转自:http://www.169it.com/article/14360294838474691537.html |