Install libgnupg-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libgnupg-perl
Description:
interface to GnuPG 1.4 using its coprocess interface
GnuPG is a Perl module that provides a limited programmatic interface to the GNU Privacy Guard program. It uses the coprocess hook system provided by gpg and communicates using shared memory. It attempts to map the interactive interface offered by the gpg command-line tool to a more programmatic API. . This module is compatible with the "classic" 1.4 version of gnupg only. It does not work with modern gnupg 2.1x currently.
Homepage: https://metacpan.org/release/GnuPG
Version: 0.19-3
Section: universe/perl