MAC Address for Non-Windows

As a follow-up to my last post on finding your MAC Address (for Windows), I now present without any fanfare:

How to find your MAC if using OS X

Choose "System Preferences..." from the Apple menu. Then select "Network." Double-click on "Airport" or "Built-in Ethernet" depending on how you access the Internet or your network.

Notice that your MAC Address is called an Airport ID or Ethernet ID.

How to find your MAC if using Linux

If you are using Linux, you already know how, because well...you are using Linux and therefore possess all computing knowledge.  Okay maybe not, but for the newbie, launch Terminal and type ifconfig for wired network cards or iwconfig for wireless.