..one day, someone will create a FE for linux only, something like these two:
maximusarcade.com which is for windows only
gameex.net which is for windows only
those are fully loaded and supported.. i know there's some already for linux, but GXmame and others are not really *FE* for a cabinet, yes, they let you play games, but mostly you have to use a mouse and a keyboard to play games. Wah!Cabe ? bah..