$ sudo apt-get update
$ sudo apt-get install ncurses-hexedit 

ncurses-hexedit is installed in your system.

Make ensure the ncurses-hexedit package were installed using the commands given below,

$ sudo dpkg-query -l | grep ncurses-hexedit *

You will get with ncurses-hexedit package name, version, architecture and description in a table

ncurses-hexedit package basic information: