Install wraplinux by entering the following commands in the terminal:
sudo apt update sudo apt install wraplinux
Description:
Utility to wrap a Linux kernel and initrd into an ELF or NBI file
wraplinux is a tool to wrap an x86 Linux kernel and one or more initrd files into asingle file in ELF or NBI format, as required by some booting protocols.
Homepage: http://ftp.kernel.org/pub/linux/utils/boot/wraplinux/
Version: 1.7-8build1
Section: universe/utils