$ sudo apt-get update
$ sudo apt-get install maas-region-controller 

maas-region-controller is installed in your system.

Make ensure the maas-region-controller package were installed using the commands given below,

$ sudo dpkg-query -l | grep maas-region-controller *

You will get with maas-region-controller package name, version, architecture and description in a table

maas-region-controller package basic information: