The Mate desktop was modeled after the discontinued Gnome 2 desktop because many people didn't like the direction the Gnome and Unity desktops headed towards. To install Mate on Ubuntu 12.04 (Precise Pangolin), open a terminal and enter following commands
Setting the Path Environmental Variable on Windows 7
Whenever you need to call executables from the command line, this is not possible unless you either have directed your console to its location with the cd (change directory) command, or have set it in the PATH variable. The Path