$ sudo apt-get update
$ sudo apt-get install groonga-tokenizer-mecab 

groonga-tokenizer-mecab is installed in your system.

Make ensure the groonga-tokenizer-mecab package were installed using the commands given below,

$ sudo dpkg-query -l | grep groonga-tokenizer-mecab *

You will get with groonga-tokenizer-mecab package name, version, architecture and description in a table

groonga-tokenizer-mecab package basic information: