$ sudo apt-get update
$ sudo apt-get install gnome-mastermind 

gnome-mastermind is installed in your system.

Make ensure the gnome-mastermind package were installed using the commands given below,

$ sudo dpkg-query -l | grep gnome-mastermind *

You will get with gnome-mastermind package name, version, architecture and description in a table

gnome-mastermind package basic information: