sudo sh ~/Downloads/crouton -r xenial -t xfce-desktop,keyboard,audio,extension,touch,chrome
をしたら
下のエラー
/usr/local/chroots/xenial already has stuff in it! Either delete it, specify a different name (-n), or specify -u to update it.
これをけす
$ sudo rm -rf /usr/local/chroots/xenial