EOF
If you absolutely must have an ISO (for CD/DVD burning or legacy hypervisors), only attempt this with minimal Linux systems under 1.5 GB. For everything else, embrace USB imaging – it's faster, more reliable, and actually bootable on modern hardware. convert vdi to bootable iso
mkdir -p iso_build/boot/grub cat > iso_build/boot/grub/grub.cfg << EOF set default="0" set timeout=5 menuentry "My Linux System" linux /boot/vmlinuz root=/dev/sda1 ro quiet initrd /boot/initrd.img EOF If you absolutely must have an ISO
Virtual machines are great for testing, but what happens when you need to take that perfectly configured Linux environment or legacy Windows system and run it on physical hardware? You need a bootable ISO. embrace USB imaging – it's faster