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How to run iso files directly from the HDD with GRUB2?
All you need to do is direct GRUB2 to the appropriate file, and tell it where it can find the kernel and the initramdisk or initram filesystem (depending on which one your distribution uses). In this example, a Kubuntu 15.04 live environment will be set up to run on an Ubuntu 14.04 box as a Grub menu item.
Can a Linux ISO be booted from a hard drive?
Linux’s GRUB2 boot loader can boot Linux ISO files directly from your hard drive. Boot Linux live CDs or even install Linux on another hard drive partition without burning it to disc or booting from a USB drive.
How to create a multi boot drive in Grub?
grub-n-iso_multiboot A simple way to create a USB [multi]boot drive including the grub bootloader and the GRUB menuentries for Ubuntu ISO files is to use grub-n-iso_multiboot with the shell-script file mk-grub-n-iso. It does the main part of the work automatically with the help of a couple of files for the configuration of the booting system.
A very simple way of creating a GRUB menuentry for a bootable ISO file is to use grml-rescueboot. The package does the following: Creates a /boot/grml folder. Automatically adds menuentries to the GRUB menu for any ISO files located in the /boot/grml folder.
How to update GRUB configuration in Debian Linux?
On Debian-based systems, you can add bash scripts that output extra GRUB configuration to /etc/grub.d/ and run update-grub to build a new grub.cfg file. But, you also could just edit grub.cfg directly or otherwise use your distribution’s GRUB configuration scripts to add the following menu items:
Can a Linux ISO be booted from a CD?
Most of Linux distributions provide ISO files that are designed and built to run in Live Mode directly from a bootable media such as CD / DVD, Flash / USB cards or even directly from a Hard Drive using Linux Grub menu without the need to burn it to a CD / DVD or create a bootable USB.
How to run iso files directly from the HDD?
First set up a variable named $menuentry. This is where the ISO file is located. If you want to change to a different ISO, you need to change the bit where it says set isofile=”/path/to/file/name-of-iso-file-.iso”. The next line is where you specify the loopback device; you also need to give it the right partition number.