Steps :

  1. Install first Gconf-editor with below command
               sudo apt-get install gconf-editor

  2. Open the gconf-editor and browse this path

        desktop > gnome > shell > windows


  1. On the right pane of the window , change the “button_layout” entry from:



      then hit enter.

  1. Close gcon-editor and logout the current session.

Enjoy: Feel Free.Feel Independent.ADOPT OpenSource.