Oscar is a full-fat operating system install
that I can ssh into and do stuff.
The host operating system (which runs oscar)
barely has anything installed,
and runs from a RAM disk.
Oscar is backed by a magnetic disk.

This uses my
[toolbox](https://git.woozle.org/neale/toolbox)
image,
which provides a basic Alpine shell with an SSH server
and a few hooks to use Alpine's standard persistence mechanisms.