Install libduo-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libduo-dev
Description:
Duo Security development libraries and header files
This package provides the development libraries and header files needed to link against the Duo Security library functions. Also includes the manpages for library functions.
Homepage: https://github.com/duosecurity/duo_unix
Version: 1.9.21-1build1
Section: universe/libdevel