$ sudo apt-get update
$ sudo apt-get install mythtv-dbg 

mythtv-dbg is installed in your system.

Make ensure the mythtv-dbg package were installed using the commands given below,

$ sudo dpkg-query -l | grep mythtv-dbg *

You will get with mythtv-dbg package name, version, architecture and description in a table

mythtv-dbg package basic information: