grub2 直接启动 iso 系统镜像

[qiuxiang]

编辑 /etc/grub.d/40_custom

menuentry "Zorin" {
  set isofile="/tmp/Zorin-OS-15-Core-64-bit-r1.iso"
  loopback loop (hd0,9)$isofile
  linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile
  initrd (loop)/casper/initrd.lz4
}

menuentry "archlinux-2021.01.01-x86_64.iso" {
  set img_loop="/boot/archlinux-2021.01.01-x86_64.iso"
  set img_dev="/dev/disk/by-uuid/5a572766-ddd4-434b-ac11-638b6fb3e9a1"
  loopback loop $img_loop
  linux (loop)/arch/boot/x86_64/vmlinuz-linux img_dev=$img_dev img_loop=$img_loop
  initrd (loop)/arch/boot/amd_ucode.img (loop)/arch/boot/intel_ucode.img (loop)/arch/boot/x86_64/initramfs-linux.img
}

menuentry "Manjaro" {
  set isofile="/tmp/manjaro-gnome-18.0.4-stable-x86_64.iso"
  search --no-floppy -f $isofile --set=root
  probe -u $root --set=uuid
  loopback loop (hd0,9)$isofile
  linux (loop)/boot/vmlinuz-x86_64 img_dev=/dev/disk/by-uuid/$uuid img_loop=$isofile
  initrd (loop)/boot/amd_ucode.img (loop)/boot/initramfs-x86_64.img
}

然后运行

sudo update-grub