Distribution EOLE

mkdir -p /home/ltsp/focal
debootstrap focal /home/ltsp/focal/
chroot /home/ltsp/focal/ apt install -y --no-install-recommends linux-generic initramfs-tools
echo """deb [ arch=amd64 ] http://test-eole.ac-dijon.fr/ubuntu focal main universe multiverse restricted
deb [ arch=amd64 ] http://test-eole.ac-dijon.fr/ubuntu focal-security main universe multiverse restricted
deb [ arch=amd64 ] http://test-eole.ac-dijon.fr/ubuntu focal-updates main universe multiverse restricted""" > /home/ltsp/focal/etc/apt/sources.list
chroot /home/ltsp/focal/ apt update
chroot /home/ltsp/focal/ apt install -y ltsp gnome

mkdir /home/ltsp
cd /home/ltsp
wget https://releases.ubuntu.com/20.04.1/ubuntu-20.04.1-desktop-amd64.iso
mkdir c
mount -o loop /home/ubuntu-20.04.1-desktop-amd64.iso c/
mkdir -p /srv/tftp/ltsp/ubuntu /srv/ltsp/images
cp -a c/casper/filesystem.squashfs /srv/ltsp/images/ubuntu.img
cp -a c/casper/vmlinuz /srv/tftp/ltsp/ubuntu
cp -a c/casper/initrd /srv/tftp/ltsp/ubuntu.img
umount c
rmdir c

mkdir -p /srv/ltsp/images/
mv focal-server-cloudimg-amd64.img /srv/ltsp/images/cloud.img
mkdir a
mount /srv/ltsp/images/cloud.img a/
mkdir -p  /srv/tftp/ltsp/cloud
cp -L a/boot/initrd.img /srv/tftp/ltsp/cloud
cp -L a/boot/vmlinuz /srv/tftp/ltsp/cloud
umount a
rmdir a