How to Boot an Ubuntu ISO from Your Hard Drive

Step-by-Step Guide

1. 1

   Step 1: Download the bootable disc image from here.

   Type the following command into the terminal: sudo grub-install
   --root-directory=/media/grub2 /dev/sda. , Here are a few examples.
   
   Type the following command into the terminal: sudo gedit /etc/grub.d/40_custom and paste these menu entries to the end of the file.
   
   Replace /PATH-TO-UBUNTU-ISO/FILENAME.iso with the appropriate path.
   
   On my system it would be /home/myUserName/Downloads/lubuntu-natty-i386.iso =====menuentry "Ubuntu
   10.10 Desktop ISO" { loopback loop /PATH-TO-UBUNTU-ISO/FILENAME.iso linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/PATH-TO-UBUNTU-ISO/FILENAME.iso noeject noprompt splash
   -- initrd (loop)/casper/initrd.lz } menuentry "Linux Mint 10 Gnome ISO" { loopback loop /FILEPATH/linuxmint10.iso linux (loop)/casper/vmlinuz file=/cdrom/preseed/mint.seed boot=casper initrd=/casper/initrd.lz iso-scan/filename=/FILEPATH/linuxmint10.iso noeject noprompt splash
   -- initrd (loop)/casper/initrd.lz } ,
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   Step 2: Install GRUB2 if it is not already installed.

3. 3

   Step 3: Add a menu entry for your Ubuntu ISO.

4. 4

   Step 4: Make make the custom menu entries active

5. 5

   Step 5: run "sudo update-grub"

Detailed Guide

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