Well, thankfully this is rather trivial task for Linux and you can change MAC address of your network adapter using a few CLI/console commands. Honestly speaking it is impossible to literally change MAC address as it’s loaded into firmware but you can configure Linux so it will transform old MAC to the new one the fly.

The commands are are below but before typing them let’s consider why one might need this. One of the simplest examples is here: you acquire IP address, gateway, DNS entries via DHCP server which is set up to give out your IP settings to your MAC address only so if you change [possibly broken] network adapter you will need to ask sysadmin to change DHCP server’s settings… If this looks familiar to you, just type the following commands with sudo prefix or under superuser/root:

ifconfig eth0 down
ifconfig eth0 hw ether 00:19:7e:53:8c:a3
ifconfig eth0 up

eth0 – is hardware name of your network interface, you can use ip link to see all available interfaces identified by your system.
00:19:7e:53:8c:a3 is new MAC address you’d like to apply to the NIC.

These commands should be added into startup scripts if you require them to appear after Linux system reboots. This works on any distribution like Fedora, Ubuntu, Debian, RedHat, Suse whatever.

 

7 Comments

 

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  5. March 25, 2010  8:27 am by Hyder Reply

    Excellent tips. I was trying to change my mac address in linux your tips solved my problem. Thank a lot

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