Came across this nifty little article <https://serversfor.dev/linux-inside-out/the-linux-kernel-is-just-a-program/> (found on Bluesky <https://bsky.app/profile/steveklabnik.com/post/3mapj6kf76k2d>) showing that you can run the Linux kernel directly from within a VM in qemu, without installing a distro or anything. It will boot, and then die because it wants to mount a root filesystem and start an init process; so then it’s easy enough to set that up with a few more commands, try booting it again, and there you go -- you have a running VM.