$ sudo apt-get update
$ sudo apt-get install icingaweb2-module-monitoring 

icingaweb2-module-monitoring is installed in your system.

Make ensure the icingaweb2-module-monitoring package were installed using the commands given below,

$ sudo dpkg-query -l | grep icingaweb2-module-monitoring *

You will get with icingaweb2-module-monitoring package name, version, architecture and description in a table

icingaweb2-module-monitoring package basic information: