Ubuntu 12.04 using gnome-shell

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http://www.unix.com – Ubuntu 12.04 using gnome-shell I just removed the entire unity unity-2d gnome desktop and installed the barebones essentials "gnome-shell" and all is working fine. The problem that I have noticed seems to be with permissions. These are the things that I cannot do: 1 -(tty access) control-alt-f1,f2,and etc. 2 - customize my desktop 3 - If I attempt to sudo /etc/init.d/gdm stop, it hangs(need add an NVIDIA video driver that require me to stop the GUI), I believe because of some type of security thing going on. 4 - I can successfully mount the root partion using single m (HowTos)