$ sudo apt-get update
$ sudo apt-get install hamradio-datamodes 

hamradio-datamodes is installed in your system.

Make ensure the hamradio-datamodes package were installed using the commands given below,

$ sudo dpkg-query -l | grep hamradio-datamodes *

You will get with hamradio-datamodes package name, version, architecture and description in a table

hamradio-datamodes package basic information: