This tutorial helps you to build a Grub USB stick to boot your operating systems.
Create basic folder structure
mkdir -p bootless/boot/{grub,custom}
wget https://git.fluxo.info/bootless/plain/templates/grub.cfg -O bootless/boot/grub/grub.cfg
wget https://git.fluxo.info/bootless/plain/templates/custom.cfg -O bootless/boot/custom/custom.cfg
Customize
Please check and customize the downloaded configuration above. The defaults:
- Have examples to help customizations.
- Allows you to load into Grub and boot your OS using the grub shell.
- Provides two functions,
bootfdeandbootimgto simplify booting your encrypted system.
You may also place custom images into the USB stick -- with the drawback to have to keep them up-to-date:
cp -r /boot /tmp/bootless/custom/debian
Create a bootable image
grub-mkrescue -o bootless.iso bootless
Record the image into the USB stick
WARNING! This will irrevocably replace the contents of your USB stick. Pay
attention to get the right device. If your USB stick is attached to your
computer and reachable through /dev/sdb, you just have to run
sudo dd if=bootless.iso of=/dev/sdb