I sponsored this very early on because MWL is one of my absolute favourite authors. His work is fantastic and I'm stoked to eventually get the book!

> If I remember correctly the actual container part of Linux containers (doing cgroups/namespaces) is LXC, then LXD is a management daemon frontend on top of that?

This is correct. LXD is a set of abstractions on top of LXC intended to make some aspects of working with LXC, like networking, a bit easier.

I did gloss over LXC vs LXD and I agree that it would be good to explain the difference between them. I'll make the edit and mention unprivileged containers when I get back to my PC this evening :)