hi
i was using a laptop before at my school's network. Now i changed my laptop and installed latest version of kubuntu. But the problem is without changing my mac address, i cant use internet. So i changed the mac adress by a command but i dont want to use commands everytime i start the computer. So my question is, What should i do to change the mac adress of the computer automatically ?

i tried to add this line:
at : /etc/network/interfaces
Didnt Work..
also tried many lines there but didnt work

Can someone tell me please what line should i add to where to change my mac adress ?

Thanks in advance.

It should just be:
hwaddress ether XX:XX:XX:XX:XX:XX
within your interface stanza

Otherwise you might try a pre-up with:
ifconfig eth0 hw ether XX:XX:XX:XX:XX:XX

pinniped i tried that one .. But unfortunately it didnt work.
i wrote

my /etc/network/interfaces file is :
it does not work.

Where should i write ?

Can't you just tell the person who runs your school's network your new computer's MAC address?

But the problem is, i still have my old laptop and i ll use old and new one.

So you're trying to circumvent the rules?

lets kill all the linux developers that allows us to change mac adress (:

In the interfaces file, just put:

pre-up /sbin/ifconfig eth0 hw ether XX:XX:XX:XX:XX:XX

You can also ignore the ifup/ifdown scripts altogether and just configure everything with ifconfig somewhere in the network startup scripts.

it works !!!
Thank you so much piiniped.

So get the network admin to keep the old and add the new.

No, you are the one in the wrong, don't blame the tool maker for the poor tradesman.;