thin jail

I'm following the excellent handbook's chapter on creating jails (“Chapter 17. Jails and Containers”), and in particular §17.5.2 “Creating a Thin Jail Using NullFS”. I'm following the instructions almost verbatim, except that I'm creating a 14.1-RELEASE template rather than a 13.2-RELEASE...

Attempting to create a thin jail on a Raspberry Pi using 13-2-REL, I had trouble with the handbook's skeleton formulation 17.5.2. Creating a Thin Jail Using NullFS. While searching for solutions, I stumbled upon Scott Robbins's method for creating thin jails using unionfs which worked but failed...