grub2 的直接從 iso 檔開機功能 (boot from iso)

menuentry "Ubuntu Live 9.04 32bit" {
loopback loop /boot/isos/ubuntu9.04.iso
linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/isos/ubuntu9.04.iso --
initrd (loop)/casper/initrd.gz
}
menuentry "Ubuntu 8.10" {
set isofile="/boot/isos/ubuntu.iso"
loopback loop $isofile
linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile quiet splash noprompt --
initrd (loop)/casper/initrd.lz
}