$ sudo apt-get update
$ sudo apt-get install kdeartwork-wallpapers 

kdeartwork-wallpapers is installed in your system.

Make ensure the kdeartwork-wallpapers package were installed using the commands given below,

$ sudo dpkg-query -l | grep kdeartwork-wallpapers *

You will get with kdeartwork-wallpapers package name, version, architecture and description in a table

kdeartwork-wallpapers package basic information: