$ sudo apt-get update
$ sudo apt-get install apache2-mpm-itk 

apache2-mpm-itk is installed in your system.

Make ensure the apache2-mpm-itk package were installed using the commands given below,

$ sudo dpkg-query -l | grep apache2-mpm-itk *

You will get with apache2-mpm-itk package name, version, architecture and description in a table

apache2-mpm-itk package basic information: