I use Ubuntu XFCE4 and I just upgraded to 14.04. So I rebooted my computer like it asked and when I tried to boot into Ubuntu, it came up with the usual message about an error and that it closed unsuccessfully (sorry I can't show you the actual message because my copy and paste doesn't work in the shell). Then I try to reload Ubuntu with
sudo sh -e ~/Downloads/crouton -n precise -u
but then I got:
Downloading latest crouton installer...
##################################################################### 100.0%
/usr/local/chroots/precise does not exist: cannot update.
Valid chroots:
elementary
Could someone help me get Ubuntu back?