$ sudo apt-get update
$ sudo apt-get install erlang-os-mon 

erlang-os-mon is installed in your system.

Make ensure the erlang-os-mon package were installed using the commands given below,

$ sudo dpkg-query -l | grep erlang-os-mon *

You will get with erlang-os-mon package name, version, architecture and description in a table

erlang-os-mon package basic information: