[ubuntu] How to Find Mac address of NIC with Its Name

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http://ubuntuforums.org – Hello How can I find the MAC address of my NIC card and its name. Just for Example. I've one system with 4 Ethernet port. Now I can get the MAC address by "ifconfig" but the question is which mac address is binded to the particular Ethernet card or port? So I can connect to the exact network. (Hardware)