If you’re old windows user, and in love with the common feature in Gnome to use Backspace key to go back one level in File Manager, you might get disappointed by not finding the same Backspace to serve the purpose in Ubuntu 13.04.
To enable this edit the file (may require Sudo):
And add (using a in vim):
(gtk_accel_path “<Actions>/ShellActions/Up” “BackSpace”)
Restart Nautilus by: