On Fri, Aug 30, 2019 at 05:31:50PM +0100, Paul Sutton wrote: > What tool is used to produce the graphical interface for programs such > as tasksel
A program named dialog, or whiptail which is basically "dialog lite". Both of these are in packages with the same name as the program. ii dialog 1.3-20190211-1 amd64 Displays user-friendly dialog box ii whiptail 0.52.20-8 amd64 Displays user-friendly dialog box