$ sudo apt-get update
$ sudo apt-get install fretsonfire-songs-muldjord 

fretsonfire-songs-muldjord is installed in your system.

Make ensure the fretsonfire-songs-muldjord package were installed using the commands given below,

$ sudo dpkg-query -l | grep fretsonfire-songs-muldjord *

You will get with fretsonfire-songs-muldjord package name, version, architecture and description in a table

fretsonfire-songs-muldjord package basic information: