dialog

About dialog

From Debian's package description

This application 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.

The following types of boxes are at your disposal: yes/no Typical query style box with "Yes" and "No" answer buttons menu A scrolling list of menu choices with single entry selection input Query style box with text entry field message Similar to the yes/no box, but with only an "Ok" button text A scrollable text box that works like a simple file viewer info A message display that allows asynchronous script execution checklist Similar to the menu box, but allowing multiple selections radiolist Checklist style box allowing single selections gauge Typical "progress report" style box tail Allows viewing the end of files (tail) that auto updates background tail Similar to tail but runs in the background. editbox Allows editing an existing file

From Debian's description of the dialog package, under that package's license.