![]() In this file, we can add custom entries to the GRUB boot menu.Ĭopy and paste the following text at the end of this file. When it came time to turn the laptop back in to work I needed to remove GRUB, all of the Ubuntu partitions, and set it back to how it used to be. The first line of this file is #! /bin/sh indicating it’s a shell script. When dual-booting Ubuntu and Windows 10, the Ubuntu installer will setup the GRUB bootloader so that you can choose between loading Ubuntu or Windows at boot time. Then open up a terminal window and edit the /etc/grub.d/40_custom file with a command-line text editor like Nano. Log in to a computer running Linux and download an Ubuntu ISO image file. However, if you use UEFI, then you should disable secure boot in the firmware for GRUB2 to boot ISO files, otherwise, you might see the “can not find command loopback” error. The following instructions work on both the traditional BIOS and the newer UEFI firmware. To use GRUB2 to boot ISO files, you need a Linux distro with GRUB2 as the boot loader already installed on your computer. You can load ISO images over the network by using the TFTP protocol. GRUB2 can read files directly from LVM and RAID devices.GRUB2 supports many file systems, including but not limited to ext4, HFS+, and NTFS, which means you can put your ISO file on any of these file systems.Many Linux distributions can be booted directly from an ISO file. GRUB Legacy (version 0.x) doesn’t have this feature. It can boot Linux ISO image files stored on the hard drive without a USB or DVD. Note that you might not be able to download the ISO from this link on a Windows computer. If you don’t have a USB thumb drive, you can boot Windows 10 ISO on the hard drive with GRUB2. GRUB2 ( GRand Unified Bootloader) is the standard boot loader for Linux. Yes, you can create a Windows 10 bootable USB on Ubuntu or any Linux distro. But what if you don’t have an optical disk or USB thumb drive around, or your computer does not support burning ISO images to an optical disk? You can do it with graphical tools or from the command line. Normally you need to create a live DVD or live USB in order to boot Linux ISO images. This tutorial will be showing you how to boot ISO files stored on your hard drive with the GRUB2 boot loader.
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