Download *.iso image:

  sudo apt-get install grub-imageboot
  sudo mkdir -p /boot/images
  sudo cp /home/youruser/Downloads/6uuj12uc.iso /boot/images
  sudo update-grub

Wenn das Update fehlschlägt, von einem externen USB-Stick updaten:

  geteltorito -o bios.img g2uj18us.iso
  dd if=bios.img of=/dev/sdX bs=1M

Boot from USB Stick.

Creating a bootable USB drive from an ISO image

apt-get install syslinux-utils
isohybrid path/to/image.iso
lsblk
dd if=path/to/image.iso of=/dev/sdX

https://www.turnkeylinux.org/blog/iso2usb