$ sudo apt-get update
$ sudo apt-get install rawtherapee-data 

rawtherapee-data is installed in your system.

Make ensure the rawtherapee-data package were installed using the commands given below,

$ sudo dpkg-query -l | grep rawtherapee-data *

You will get with rawtherapee-data package name, version, architecture and description in a table

rawtherapee-data package basic information: