$ sudo apt-get update
$ sudo apt-get install insighttoolkit4-examples 

insighttoolkit4-examples is installed in your system.

Make ensure the insighttoolkit4-examples package were installed using the commands given below,

$ sudo dpkg-query -l | grep insighttoolkit4-examples *

You will get with insighttoolkit4-examples package name, version, architecture and description in a table

insighttoolkit4-examples package basic information: