This sub-command launches a login shell into the jail. Default is password-less root login.

ishmael ~ # bastille console folsom
FreeBSD 11.2-RELEASE-p4 (GENERIC) #0: Thu Sep 27 08:16:24 UTC 2018

Welcome to FreeBSD!

Release Notes, Errata:
Security Advisories:
FreeBSD Handbook:
Questions List:
FreeBSD Forums:

Documents installed with the system are in the /usr/local/share/doc/freebsd/
directory, or can be installed later with:  pkg install en-freebsd-doc
For other languages, replace "en" with a language code like de or fr.

Show the version of FreeBSD installed:  freebsd-version ; uname -a
Please include that output and any error messages when posting questions.
Introduction to manual pages:  man man
FreeBSD directory layout:      man hier

Edit /etc/motd to change this login announcement.
root@folsom:~ #

At this point you are logged in to the jail and have full shell access. The system is yours to use and/or abuse as you like. Any changes made inside the jail are limited to the jail.