how do i mask my mac address



i posted this thread under bsd but realized that it actually belongs here instead.... makes more sense to put it under ip. so without further delay on to my problem ...
i havent been using unix for that long, so this question might sound quite stupid to most of you. i want to know how to mask my mac address

i found a command on how to do it but i dont think it works:
"ifconfig <interface> link <address>"
unfortunately being the n00b i am, i dont really even know how to view my mac address. so i dont really how to mask it, or even if this command worked or not. if anyone could please tell me how to check my mac address and if there is a way to change it.
thanks

the way i check my mac address on network card by command

thanks , never noticed the mac was under ether in my "ifconfig" in wireless, got it to change. all i need to know now is if my computer will broadcast a changed mac after i have already connected to the network using the original mac, i.e. will it ask for a new ip as that previous ip is assigned to the original mac on the network, or will i just get dissconected  

ps:
command to change ur mac in freebsd is
'ifconfig <interface> link <address>'
make sure the address u specify follows the standard format for mac addresses, i.e. xx:yy:zz:aa:bb:cc, .... (took me 2 hrs to figure that out  .... damn it)...oh and i dont know if u should really change the first 4 parameters of the mac, because they might be assigned to the company that ur computer belongs to...still not sure... will try and tell you guys later;

peace