Binary package “live-boot” in ubuntu xenial

Live System Boot Components

 The Live Systems project maintains the components to build Debian based Live
 systems and the official Debian Live images themselves.
 .
 live-boot contains the components to configure a live system during the boot
 process (early userspace).
 .
 In addition to live-boot, a backend for the initrd generation is required, such
 as live-boot-initramfs-tools.