What is Meta Key for Ubuntu on Mac?

I have Ubuntu installed on Mac. What is the Meta Key on Mac keyboard?

Solution 1:

On my Macbook Pro (el capitan), the meta key is by default mapped to the ESC key.

For example, say in emacs editor, to do a M-% (emacs find and replace), I would do ESC+%

(I've tested this on iTerm2 and Terminal app.)

This Stackoverflow forum helped me.

Solution 2:

You can check in System -> Preferences -> Keyboard -> Layout -> Options ->Alt/Win key behavior if you are running a GUI, but it is probably defaulted to the option key on a Mac.

If you prefer command line, you can use xev to check what each key is mapped to.