disabling graphical boot and shutdown in Fedora 17

[Sergio]

> When shutting down from the console, a graphical screen appears showing
> the Fedora logo.  That's really silly and I'd like to turn that off ---
> but how?
>
Delete 'rghb' in GRUB_CMDLINE_LINUX in /etc/default/grub

Or just uninstall the plymouth theme then you won't have that logo at 
shutdown and the plymouth theme at startup will be a simple progress bar.