cdebconf-gtk-entropy software package provides cdebconf gtk plugin for reading from /dev/random, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install cdebconf-gtk-entropy
cdebconf-gtk-entropy is installed in your system.
Make ensure the cdebconf-gtk-entropy package were installed using the commands given below,
$ sudo dpkg-query -l | grep cdebconf-gtk-entropy *
You will get with cdebconf-gtk-entropy package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | debian-installer udeb packages |
| Package | cdebconf-gtk-entropy |
| Version | 0.33 |
| Description | cdebconf gtk plugin for reading from /dev/random |
| Sub Section | Debian-installer |