$ sudo apt-get update
$ sudo apt-get install partman-iscsi 

partman-iscsi is installed in your system.

Make ensure the partman-iscsi package were installed using the commands given below,

$ sudo dpkg-query -l | grep partman-iscsi *

You will get with partman-iscsi package name, version, architecture and description in a table

partman-iscsi package basic information: