Using a Mac keyboard with Ubuntu Linux

I frequently switch between Mac and Linux, and it's been troublesome to remember to type Command-whatever on the Mac, but Control-whatever on Linux. (For copy-and paste, for example.)

I did a quick web search and found out that it's easy to make Ubuntu Linux recognize the Command keys as an extra set of control keys:

Choose menu: System : Preferences : Keyboard

Select the Layouts tab

Choose "Layout Options"

Open the "Alt / Win Key Behaviour" tab

Check the "Control is mapped to the Win-keys" checkbox.