lrc-livecd

#!/usr/bin/env bash

# Directions loosly taken from here: https://help.ubuntu.com/community/MakeALiveCD/DVD/BootableFlashFromHarddiskInstall

#exec 200>/var/lock/lrc-livecd
#flock -n 200 || exit 1

RELEASE=trusty
RELEASE=xenial

if ! test -d /var/chroot/$RELEASE ; then
	debootstrap \
		--variant=minbase \
		--include=grub-pc \
		$RELEASE \
		/var/chroot/$RELEASE.part \
		http://archive.ubuntu.com/ubuntu
	mv /var/chroot/$RELEASE.part /var/chroot/$RELEASE
fi

cat << EOF > /var/chroot/$RELEASE/finish-up.sh
#!/usr/bin/env bash

set -x

mount none -t proc /proc
mount none -t sysfs /sys
mount none -t devpts /dev/pts

export HOME=/root
export LC_ALL=C

apt-get update
apt-get upgrade --yes
apt-get install --yes \
	btrfs-tools \
	casper \
	e2fsprogs \
	jfsutils \
	laptop-detect \
	linux-generic \
	lupin-casper \
	lvm2 \
	net-tools \
	os-prober \
	reiserfsprogs \
	squashfs-tools \
	ubuntu-standard \
	vim \
	xfsprogs
update-initramfs -u
update-grub
printf "root\nroot\n" | passwd
umount /proc
umount /sys/kernel/security
umount /sys
umount /dev/pts
EOF

chmod +x /var/chroot/$RELEASE/finish-up.sh

chroot /var/chroot/$RELEASE finish-up.sh

rm -rf cdroot
mkdir -p cdroot/{casper,boot/grub}

mksquashfs /var/chroot/$RELEASE $RELEASE.squashfs.part -noappend && \
	mv $RELEASE.squashfs.part cdroot/casper/filesystem.squashfs

cp -r /var/chroot/$RELEASE/boot/* cdroot/boot/.

(
	cd cdroot/boot
	ln -s $(ls -1 vmlinuz*) vmlinuz
	ln -s $(ls -1 initrd.img*) initrd.img
)

cat << EOF > cdroot/boot/grub/grub.cfg
set default="0"
set timeout=20

menuentry "Ubuntu CLI" {
linux /boot/vmlinuz boot=casper textonly
initrd /boot/initrd.img
}

menuentry "Ubuntu GUI" {
linux /boot/vmlinuz boot=casper quiet splash
initrd /boot/initrd.img
}

menuentry "Ubuntu in safe mode" {
linux /boot/vmlinuz boot=casper xforcevesa
initrd /boot/initrd.img
}

menuentry "Ubuntu GUI persistent mode" {
linux /boot/vmlinuz boot=casper persistent quiet splash
initrd /boot/initrd.img
}

menuentry "Ubuntu GUI from RAM" {
linux /boot/vmlinuz boot=casper toram quiet splash
initrd /boot/initrd.img
}

menuentry "Check Disk for Defects" {
linux /boot/vmlinuz boot=casper integrity-check quiet splash
initrd /boot/initrd.img
}

menuentry "Memory Test" {
linux16 /boot/memtest86+.bin
}

menuentry "Boot from the first hard disk" {
set root=(hd0)
chainloader +1
}
EOF

grub-mkrescue -o live-cd.iso cdroot