Run
bash bootstrap/crouton-host.sh
To setup crouton install it and run:
sudo crouton -t cli-extra,core,keyboard,touch,xiwi -r focal -m http://mirrors.digitalocean.com/ubuntu/
Inside the chroot:
bootstrap/crouton-chroot.sh
Now add the file shares in bootstrap/crouton-shares
to the Crouton
installation modifying /etc/crouton/shares inside the chroot.
To update it:
sudo crouton -t cli-extra,core,kde,kde-desktop,keyboard,touch,xiwi -r focal -u