$ sudo apt-get update
$ sudo apt-get install cl-zs3 

cl-zs3 is installed in your system.

Make ensure the cl-zs3 package were installed using the commands given below,

$ sudo dpkg-query -l | grep cl-zs3 *

You will get with cl-zs3 package name, version, architecture and description in a table

cl-zs3 package basic information: