Comment 3 for bug 1418279

See the last few comments of https://github.com/lxc/lxd/issues/2005

A privileged container is one where the container root user is the real root. In an unprivileged one, root inside the container is just some high-id random user on the host:

root 5393 0.0 0.0 530300 4964 ? Ss jun05 0:00 [lxc monitor] /var/lib/lxd/containers squid-ds216
165536 5414 0.0 0.0 225088 6040 ? Ss jun05 0:00 \_ /sbin/init