$ sudo apt-get update
$ sudo apt-get install cdebconf-newt-udeb 

cdebconf-newt-udeb is installed in your system.

Make ensure the cdebconf-newt-udeb package were installed using the commands given below,

$ sudo dpkg-query -l | grep cdebconf-newt-udeb *

You will get with cdebconf-newt-udeb package name, version, architecture and description in a table

cdebconf-newt-udeb package basic information: