Install OpenVPN from OpenVPN project's own software repositories

openvpn.sh

#!/usr/bin/env bash

if [ "$(whoami)" != "root" ]; then
    SUDO=sudo
fi

if ! $(type lsb_release > /dev/null 2>&1) ; then
    ${SUDO} apt install -y lsb-release
fi

wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | ${SUDO}  apt-key add -
${SUDO} echo "deb http://build.openvpn.net/debian/openvpn/stable $(lsb_release -sc) main" > /etc/apt/sources.list.d/openvpn-aptrepo.list
${SUDO} apt update
${SUDO} apt -y install openvpn

exit 0