You should then see something similar to HWaddr 00:C0:9E:05:BD

6. The MAC address for that ethernet card would be 00:C0:9E:05:BD

6
If you are running Windows XP you can find out the MAC address by clicking on "Start --> Programs --> Accessories --> Command Prompt". At the prompt type:
ipconfig /all
You should then see "Physical Address" and the MAC address listed. Note: Windows might list the MAC address with hyphens (-) instead of colons (

, if so, just replace them with colons when entering them into your dhcpd.conf file. (ex: change 00-45-40-10-FE-12 to 00:45:40:10:FE:12)
You will need to obtain the MAC address of the machine you would like to assign static IP address to, once you have you've found the MAC address you can add the following entry to the bottom your dhcpd.conf file:
# Assign a static IP to SERVER NAME
host NAME {
hardware ethernet 00:45:40:10:FE:12;
fixed-address 10.1.1.20;
}
You may obtain the MAC address via Ifconfig on linux or ipconfig /all on windows.
restart dhcp service /etc/init.d/dhcpd restart
Links:
http://www.linuxhelp.net/guides/dhcp/