but, even though the byte size of the img file is a multiple of 2048, the output isn't recognized by anything. I've looked at iat but it seems focused on converting various flavors of optical disc images to one another. A vmdk to iso conversion essentially represents the transformation of virtual hard drive (.vmdk file) to standard.
I can use VirtualBox's VBoxManage tool to convert this 'raw' image to a virtual disk that VirtualBox will recognize and boot: VBoxManage convertfromraw ubuntu-core-18-amd64.img -format VDI \ Qemu-img reports that the image is in raw format: $ qemu-img info ubuntu-core-18-amd64.img This was easy because I’d installed QEMU earlier on my system via Homebrew, so it was easy to convert the VMDK (the VMware disk image) to a RAW image image: > qemu-img convert -f vmdk puredarwinxmas.vmdk pd.raw: This captures the contents of the VMware image into a raw image in some (unbeknownst to me) format. I'd like to run Ubuntu Core, however I haven't found a way to convert the images that Canonical provides to a bootable ISO. A VPS provider offers its users the ability to install and run any distribution, provided that you upload a bootable ISO image.