I want to run Ubuntu on a dedicated NAS I am building.
95% of the time I want to run it in as low power mode as possible (although I do want to run Crashplan on it), so I'd like to disable most X services and therefore the X window manager environment.
However sometimes when I log in, instead of using ssh, I'd quite like the ability to run the window manager and have a (Unity?) desktop. Is there an easy way to achieve all this?