$ sudo apt-get update
$ sudo apt-get install nautilus-qdigidoc 

nautilus-qdigidoc is installed in your system.

Make ensure the nautilus-qdigidoc package were installed using the commands given below,

$ sudo dpkg-query -l | grep nautilus-qdigidoc *

You will get with nautilus-qdigidoc package name, version, architecture and description in a table

nautilus-qdigidoc package basic information: