$ sudo apt-get update
$ sudo apt-get install cl-trivial-gray-streams 

cl-trivial-gray-streams is installed in your system.

Make ensure the cl-trivial-gray-streams package were installed using the commands given below,

$ sudo dpkg-query -l | grep cl-trivial-gray-streams *

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

cl-trivial-gray-streams package basic information: