That's a bit weird. The MAC address is normally burnt into the network card.
If you do need to know (and I'm not convinced that you necessarily do), then you can get it from your normal OS. Open a terminal window and type "ifconfig" - you'll get a bunch of stuff, like :
eth0 Link encap:Ethernet HWaddr 00:0c:29:54:b0:4f
inet addr:192.168.79.129 Bcast:192.168.79.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe54:b04f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:51 errors:0 dropped:0 overruns:0 frame:0
TX packets:84 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:6585 (6.5 KB) TX bytes:12983 (12.9 KB)
Interrupt:19 Base address:0x2024
The thing you're looking for is the hex number after the HWaddr bit. In the case above it would be 00:0c:29:54:b0:4f.