Install whiptail by entering the following commands in the terminal:
sudo apt update sudo apt install whiptail
Description:
Displays user-friendly dialog boxes from shell scripts
Whiptail is a "dialog" replacement using newt instead of ncurses. It provides a method of displaying several different types of dialog boxes from shell scripts. This allows a developer of a script to interact with the user in a much friendlier manner.
Homepage: https://fedorahosted.org/newt/
Version: 0.52.20-1ubuntu1
Section: utils