Grub boot from ISO

40_custom

#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

# hd0 ~ sda
# hd0,1 ~ sda2
# hd0,5 ~ sda6
menuentry "Ubuntu Mini ISO" {
    set isofile="/mini.iso"
    loopback loop (hd0,5)$isofile
    linux (loop)/linux boot=casper iso-scan/filename=${isofile}
    initrd (loop)/initrd.gz
}

menuentry "VMware" {
        insmod ext2
        set isofile="/VMware-VMvisor-Installer-201912001-15160138.x86_64.iso"
        set gfxpayload=keep
        loopback loop (hd2,msdos1)$isofile
        linux   (loop)/mboot.c32 -c boot.cfg
}

menuentry "Linux Mint 19.3" {
        insmod ext2
        set isofile="/linuxmint-19.3-cinnamon-64bit.iso"
        set gfxpayload=keep
        loopback loop (hd2,msdos1)$isofile
        linux   (loop)/casper/vmlinuz  file=(loop)/cdrom/preseed/linuxmint.seed boot=casper iso-scan/filename=${isofile} toram ---
        initrd  (loop)/casper/initrd.lz
}