$ sudo apt-get update
$ sudo apt-get install libparallel-iterator-perl 

libparallel-iterator-perl is installed in your system.

Make ensure the libparallel-iterator-perl package were installed using the commands given below,

$ sudo dpkg-query -l | grep libparallel-iterator-perl *

You will get with libparallel-iterator-perl package name, version, architecture and description in a table

libparallel-iterator-perl package basic information: