You may be asking for something different, but FreeBSD Jails can be extremely small, even down to just a single process[0][1]. [0] https://docs.freebsd.org/en/

You may be asking for something different, but FreeBSD Jails can be extremely small, even down to just a single process[0][1]. [0] https://docs.freebsd.org/en/books/handbook/jails/ https://docs.freebsd.org/en/books/handbook/jails/ [1] https://gist.github.com/hiway/2b526fc64748e8d6e9f36f289003f843 https://gist.github.com/hiway/2b526fc64748e8d6e9f36f289003f8...