livecd-rootfs/live-build/ubuntu-core/hooks/03-boot_with_systemd.chroot

#!/bin/sh -x

# Boot using systemd and disable quiet boot
# to see what is happening.
systemd=/lib/systemd/systemd
if [ -f /etc/default/grub ]; then
    sed -i \
        -e "s,^\\([ 	]*GRUB_CMDLINE_LINUX\\)=\"\"$,\\1=\"init=$systemd\",g" \
        -e 's,^\([ 	]*GRUB_CMDLINE_LINUX_DEFAULT\)="quiet splash",\1="",g' \
    /etc/default/grub
fi