NTOPNG Installation Fixed

postinst

#!/bin/sh -e

SUB_DISTRO=`lsb_release -i|cut -f 2`
if test "$SUB_DISTRO" = "Debian"; then
  REL=`/usr/bin/lsb_release -c|cut -f 2`
else
  REL=`/usr/bin/lsb_release -s -r`
fi

case "$1" in
    configure)
	#
	MACHINE=`uname -m`
	if test "$MACHINE" = "x86_64"; then
	    EXTN="x64"
	    MACHINE_DIR=
	else
	    if test "$MACHINE" = "aarch64"; then
		EXTN="arm64"
	    else
		EXTN="armhf"
	    fi

	    REL=`lsb_release -c -s`"_pi"
	fi
	echo "deb [signed-by=/usr/share/keyrings/ntop-archive-keyring.gpg] https://packages.ntop.org/apt-stable/bullseye x64/" > /etc/apt/sources.list.d/ntop.list
	echo "deb [signed-by=/usr/share/keyrings/ntop-archive-keyring.gpg] https://packages.ntop.org/apt-stable/bullseye all/" >> /etc/apt/sources.list.d/ntop.list
	#
	# if test -f /usr/share/keyrings/ntop-archive-keyring.gpg; then
	#     echo "ntop-archive-keyring.gpg already installed in /usr/share/keyrings/: nothing to do"
	#     exit 0
	# fi
	#
	if ! test -d  ~/.gnupg; then
	    mkdir ~/.gnupg
	    chown -R ${USER}:${USER} ~/.gnupg
	    chmod -R go-rwx ~/.gnupg
	fi

	# Export proxies
	for protocol in http https
	do
	    eval "$(apt-config shell ${protocol}_proxy Acquire::$protocol::Proxy)"
	    export "${protocol}_proxy"
	done

	if ${http_proxy+"false"}; then
	    if ! ${https_proxy+"false"}; then
		PROXY=$https_proxy
	    fi
	else
	    PROXY=$http_proxy
	fi

	RETRY=0
	if ${PROXY+"false"} || [ -z ${PROXY} ]; then
	    echo "Installing ntop GPG key [no proxy]. Please wait..."
  	    gpg --no-default-keyring --keyring /usr/share/keyrings/ntop-archive-keyring.gpg --keyserver hkps://keyserver.ubuntu.com:443 --recv-keys 8E07231F05757F56FECE39773D84C955924F7599 || RETRY=1
	else
	    echo "Installing ntop GPG key [using proxy $PROXY]. Please wait..."
	    gpg --keyserver-options http-proxy=$PROXY --no-default-keyring --keyring /usr/share/keyrings/ntop-archive-keyring.gpg --keyserver hkps://keyserver.ubuntu.com:443 --recv-keys 8E07231F05757F56FECE39773D84C955924F7599 || RETRY=1
	fi

        if [ $RETRY -eq 0 ]; then
	   echo "Keys installed successfully"
        else
	    echo "Installation error. Probably you have IPv6 not properly configured"
	    echo "Trying again over IPv4..."

   	    if ${PROXY+"false"} || [ -z ${PROXY} ]; then
		echo "Installing ntop GPG key [no proxy]. Please wait..."
  		gpg --no-default-keyring --keyring /usr/share/keyrings/ntop-archive-keyring.gpg --keyserver hkps://185.125.188.26:443 --recv-keys 8E07231F05757F56FECE39773D84C955924F7599
	    else
		echo "Installing ntop GPG key [using proxy $PROXY]. Please wait..."
		gpg --keyserver-options http-proxy=$PROXY --no-default-keyring --keyring /usr/share/keyrings/ntop-archive-keyring.gpg --keyserver hkps://185.125.188.26:443 --recv-keys 8E07231F05757F56FECE39773D84C955924F7599
	    fi

            if [ $? -eq 0 ]; then
	        echo "Keys installed successfully"
	    fi
        fi
	#
	;;

    abort-upgrade|abort-remove|abort-deconfigure)
	exit 0
    ;;

    *)
	echo "postinst called with unknown argument \`$1'" >&2
	exit 0
    ;;
esac


exit 0

1. Get the NTOPNG installer .deb extract it
2. Replace the postint file
3. Zip it
4. Now install the installer.deb