Install linux with crouton on chromebook

gistfile1.txt

standard install :
sudo sh ~/Downloads/crouton -r jessie -t gnome-desktop,extension,keyboard

some Update :
sudo sh ~/Downloads/crouton -r trusty -t (what to add (keyboard or extension if forgotten) -u

-u : update
-n someName : name the chroots
-e passPhrase : encrypt the chroot with a passphrase
-r : release (precise, trusty, jessie, sid...), use list to display all the supported releases
-t : target, what to install (desktop manager, extensions ...) can be gnome-desktop, unity, kde-desktop, extension, keyboard, cli ...etc use list to display all the possible target