One of the more controversial changes in the Ubuntu 10.04 beta is the Mac OS-inspired change to have window buttons on the left side. We’ll show you how to move the buttons back to the right.
To shift the window buttons to the right side do this:
find button_layout under apps > metacity > general
The button layout can be changed by changing the “button_layout” key. Double-click button_layout to edit it.
Change the text in the Value text field to: