$ sudo apt-get update
$ sudo apt-get install groonga-token-filter-stem 

groonga-token-filter-stem is installed in your system.

Make ensure the groonga-token-filter-stem package were installed using the commands given below,

$ sudo dpkg-query -l | grep groonga-token-filter-stem *

You will get with groonga-token-filter-stem package name, version, architecture and description in a table

groonga-token-filter-stem package basic information: