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On Linux systems, the Ethernet device is typically called eth0. In order to find the hardware address of the Ethernet device:
1) Open the Terminal.
2) Type ipconfig -a and press Enter.
The hardware address is the 12-digit string of characters separated by colons (i.e., 01:23:45:AB:CD:EF).
# ipconfig -a eth0 Link encap:Ethernet HWaddr 01:23:45:AB:CD:EF inet addr:220.127.116.11 Bcast:18.104.22.168 Mask:255.255.248.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:15647904 errors:0 dropped:0 overruns:0 TX packets:69559 errors:0 dropped:0 overruns:0 Interrupt:10 Base address:0x300