diff --git a/README.install b/README.install
index c9f7c30..e31b331 100644
--- a/README.install
+++ b/README.install
@@ -1,36 +1,12 @@
 # ===================
 #
 # see:
-#    - https://docs.bigbluebutton.org/2.2/install.html
-#    - https://bigbluebutton.org/html5/
-#
-# Requirements:
-#
-#    - webserver nginx is installed
-#    - lets encrypt certificates available for $FQDN_HOSTNAME
+#    - https://docs.bigbluebutton.org/2.3/install.html
 #
 # ===================
 
-
-# ---
-# 0.) Requirements
-# ---
-
-# Install Nginx Webserver
-#
-cd /usr/local/src/nginx
-./install_nginx.sh
-
-# Install update mechanism for lets encrypt certificates
-#
-cd /usr/local/src/dehydrated-cron
-./install_dehydrated.sh
-
-# Create certificate(s)
-#
-vim /var/lib/dehydrated/domains.txt
-/var/lib/dehydrated/cron/dehydrated_cron.sh
-
+FQDN_HOSTNAME="bbb.oopen.de"
+ADMIN_EMAIL="ckubu-adm@oopen.de"
 
 # ---
 # 1.) Run script bbb-pre-install.sh
@@ -43,41 +19,40 @@ vim /var/lib/dehydrated/domains.txt
 # 2.) Install BigBlueButton
 # ---
 
-apt-get install bigbluebutton
+wget -qO- https://ubuntu.bigbluebutton.org/bbb-install.sh | bash -s -- -v bionic-230 -s $FQDN_HOSTNAME -e $ADMIN_EMAIL  -a -w
 
-# --
-# Adjust  /etc/nginx/sites-enabled/bigbluebutton to support
-# SSL Protocls
-# --
 
-if [[ ! -f "/etc/nginx/sites-available/bigbluebutton.ORIG" ]] ; then
-   cp -a /etc/nginx/sites-available/bigbluebutton /etc/nginx/sites-available/bigbluebutton.ORIG
-fi
-vim /etc/nginx/sites-enabled/bigbluebutton
-
-systemctl restart nginx
-
-apt-get update
-apt-get upgrade
-apt-get install bbb-html5
+# You can test your BigBlueButton installation. Open
+#
+#    https://$FQDN_HOSTNAME
+# 
+# enter your name, and click 'Join' to join 'Demo Meeting'. The BigBlueButton client should 
+# launch in 'Demo Meeting'.
 
 
 # ---
-# 3.) Optional: install Demo API
+# 3.) Deinstall bbb-demo
 # ---
 
-apt-get install bbb-demo
+# Warning: The API demos are installed and accessible from:
+#
+#    https://bbb.oopen.de
+#
+# and
+#
+#    https://bbb.oopen.de/demo/demo1.jsp
+#
+# These API demos allow anyone to access your server without authentication
+# to create/manage meetings and recordings. They are for testing purposes only.
+# If you are running a production system, remove them by running:
+#
+#    apt-get purge bbb-demo
+#
+apt purge bbb-demo
 
 
 # ---
-# 4.) Run script bbb-post-install.sh
-# ---
-
-/usr/local/src/bigbluebutton/bbb-post-install.sh
-
-
-# ---
-# 5.) Install Greenlight - Run script bbb-greenlight-install.sh
+# 4.) Install Greenlight - Run script bbb-greenlight-install.sh
 # ---
 
 /usr/local/src/bigbluebutton/bbb-greenlight-install.sh
@@ -88,65 +63,3 @@ apt-get install bbb-demo
 # --
 
 # =====================================================================================
-
-1. Install Docker on Ubuntu.
-
-# Remove old versions of Docker
-#
-apt-get remove docker docker-engine docker.io containerd runc
-
-
-# Install packages to allow apt to use a repository over HTTPS:
-#
-apt-get install \
-   apt-transport-https \
-   ca-certificates \
-   curl \
-   gnupg-agent \
-   software-properties-common
-
-# Add Docker’s official GPG key:
-#
-curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
-
-
-# set up the stable repository.
-#
-cat <<EOF > /etc/apt/sources.list.d/docker.list 
-deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable
-EOF
-
-
-# Update package index
-#
-apt-get update
-
-
-# Install the latest version of Docker Engine - Community and containerd,
-#
-apt-get install docker-ce docker-ce-cli containerd.io
-
-
-# Deinstall apparmor
-#
-apt-get remove apparmor
-
-
-# Create the Greenlight directory for its configuration to live in.
-#
-mkdir ~/greenlight && cd ~/greenlight
-
-
-# Greenlight will read its environment configuration from the .env file. 
-# To generate this file and install the Greenlight Docker image, run:
-#
-docker run --rm bigbluebutton/greenlight:v2 cat ./sample.env > .env
-
-
-# Generating a Secret KeyAnchor link for: generating a secret key
-#
-# Greenlight needs a secret key in order to run in production. To generate 
-# this, run:
-#
-docker run --rm bigbluebutton/greenlight:v2 bundle exec rake secret
-
diff --git a/archive/README.install b/archive/README.install
new file mode 100644
index 0000000..c9f7c30
--- /dev/null
+++ b/archive/README.install
@@ -0,0 +1,152 @@
+# ===================
+#
+# see:
+#    - https://docs.bigbluebutton.org/2.2/install.html
+#    - https://bigbluebutton.org/html5/
+#
+# Requirements:
+#
+#    - webserver nginx is installed
+#    - lets encrypt certificates available for $FQDN_HOSTNAME
+#
+# ===================
+
+
+# ---
+# 0.) Requirements
+# ---
+
+# Install Nginx Webserver
+#
+cd /usr/local/src/nginx
+./install_nginx.sh
+
+# Install update mechanism for lets encrypt certificates
+#
+cd /usr/local/src/dehydrated-cron
+./install_dehydrated.sh
+
+# Create certificate(s)
+#
+vim /var/lib/dehydrated/domains.txt
+/var/lib/dehydrated/cron/dehydrated_cron.sh
+
+
+# ---
+# 1.) Run script bbb-pre-install.sh
+# ---
+
+/usr/local/src/bigbluebutton/bbb-pre-install.sh
+
+
+# ---
+# 2.) Install BigBlueButton
+# ---
+
+apt-get install bigbluebutton
+
+# --
+# Adjust  /etc/nginx/sites-enabled/bigbluebutton to support
+# SSL Protocls
+# --
+
+if [[ ! -f "/etc/nginx/sites-available/bigbluebutton.ORIG" ]] ; then
+   cp -a /etc/nginx/sites-available/bigbluebutton /etc/nginx/sites-available/bigbluebutton.ORIG
+fi
+vim /etc/nginx/sites-enabled/bigbluebutton
+
+systemctl restart nginx
+
+apt-get update
+apt-get upgrade
+apt-get install bbb-html5
+
+
+# ---
+# 3.) Optional: install Demo API
+# ---
+
+apt-get install bbb-demo
+
+
+# ---
+# 4.) Run script bbb-post-install.sh
+# ---
+
+/usr/local/src/bigbluebutton/bbb-post-install.sh
+
+
+# ---
+# 5.) Install Greenlight - Run script bbb-greenlight-install.sh
+# ---
+
+/usr/local/src/bigbluebutton/bbb-greenlight-install.sh
+
+
+# --
+# Installation finished
+# --
+
+# =====================================================================================
+
+1. Install Docker on Ubuntu.
+
+# Remove old versions of Docker
+#
+apt-get remove docker docker-engine docker.io containerd runc
+
+
+# Install packages to allow apt to use a repository over HTTPS:
+#
+apt-get install \
+   apt-transport-https \
+   ca-certificates \
+   curl \
+   gnupg-agent \
+   software-properties-common
+
+# Add Docker’s official GPG key:
+#
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+
+
+# set up the stable repository.
+#
+cat <<EOF > /etc/apt/sources.list.d/docker.list 
+deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable
+EOF
+
+
+# Update package index
+#
+apt-get update
+
+
+# Install the latest version of Docker Engine - Community and containerd,
+#
+apt-get install docker-ce docker-ce-cli containerd.io
+
+
+# Deinstall apparmor
+#
+apt-get remove apparmor
+
+
+# Create the Greenlight directory for its configuration to live in.
+#
+mkdir ~/greenlight && cd ~/greenlight
+
+
+# Greenlight will read its environment configuration from the .env file. 
+# To generate this file and install the Greenlight Docker image, run:
+#
+docker run --rm bigbluebutton/greenlight:v2 cat ./sample.env > .env
+
+
+# Generating a Secret KeyAnchor link for: generating a secret key
+#
+# Greenlight needs a secret key in order to run in production. To generate 
+# this, run:
+#
+docker run --rm bigbluebutton/greenlight:v2 bundle exec rake secret
+
diff --git a/archive/bbb-greenlight-install.sh b/archive/bbb-greenlight-install.sh
new file mode 100755
index 0000000..0a6e59e
--- /dev/null
+++ b/archive/bbb-greenlight-install.sh
@@ -0,0 +1,793 @@
+#!/usr/bin/env bash
+  
+cript_name="$(basename $(realpath $0))"
+working_dir="$(dirname $(realpath $0))"
+
+#conf_file="${working_dir}/conf/${script_name%%.*}.conf"
+conf_file="${working_dir}/conf/bbb.conf"
+
+LOCK_DIR="/tmp/$(basename $0).$$.LOCK"
+log_file="${LOCK_DIR}/${script_name%%.*}.log"
+
+
+# ----------
+# Base Function(s)
+# ----------
+
+clean_up() {
+
+   # Perform program exit housekeeping
+   rm -rf "$LOCK_DIR"
+   blank_line
+   exit $1
+}
+
+echononl(){
+   if $terminal ; then
+      echo X\\c > /tmp/shprompt$$
+      if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
+         echo -e -n "   $*\\c" 1>&2
+      else
+         echo -e -n "   $*" 1>&2
+      fi
+      rm /tmp/shprompt$$
+   fi
+}
+fatal(){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[31m\033[1mFatal\033[m ] $*"
+   else
+      echo -e "   [ Fatal ] $*"
+   fi
+   echo ""
+   if $terminal ; then
+      echo -e "             \033[1mScript terminated\033[m.."
+   else
+      echo -e "             Script terminated.."
+   fi
+   echo ""
+   rm -rf $LOCK_DIR
+   exit 1
+}
+error (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[31m\033[1mError\033[m ] $*"
+   else
+      echo "   [ Error ] $*"
+   fi
+   echo ""
+}
+info () {
+   if $terminal ; then
+      echo ""
+      echo -e "   [ \033[32m\033[1mInfo\033[m ] $*"
+      echo ""
+   fi
+}
+note () {
+   if $terminal ; then
+      echo ""
+      echo -e "   [ \033[33m\033[1mNote\033[m ] $*"
+      echo ""
+   fi
+}
+
+echo_ok() {
+   if $terminal ; then
+      echo -e "\033[85G[ \033[32mok\033[m ]"
+   fi
+}
+echo_failed(){
+   if $terminal ; then
+      echo -e "\033[85G[ \033[1;31mfailed\033[m ]"
+   fi
+}
+echo_skipped() {
+   if $terminal ; then
+      echo -e "\033[85G[ \033[37m\033[1mskipped\033[m ]"
+   fi
+}
+echo_wait(){
+   if $terminal ; then
+      echo -en "\033[85G[ \033[5m\033[1m..\033[m ]"
+   fi
+}
+
+trim() {
+    local var="$*"
+    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
+    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
+    echo -n "$var"
+}
+
+blank_line() {
+   if $terminal ; then
+      echo ""
+   fi
+}
+
+detect_os () {
+
+   if $(which lsb_release > /dev/null 2>&1) ; then
+
+      DIST="$(lsb_release -i | awk '{print tolower($3)}')"
+      DIST_VERSION="$(lsb_release -r | awk '{print tolower($2)}')"
+      DIST_CODENAME="$(lsb_release -c | awk '{print tolower($2)}')"
+
+      if [[ "$DIST" = "debian" ]]; then
+         if $(echo "$DIST_VERSION" | grep -q '\.') ; then
+            DIST_VERSION=$(echo "$DIST_VERSION" | cut --delimiter='.' -f1)
+         fi
+      fi
+
+   elif [[ -e "/etc/os-release" ]]; then
+
+      . /etc/os-release
+
+      DIST=$ID
+      DIST_VERSION=${VERSION_ID}
+
+   fi
+
+   # remove whitespace from DIST and DIST_VERSION
+   DIST="${DIST// /}"
+   DIST_VERSION="${DIST_VERSION// /}"
+
+}
+
+
+
+# ----------
+# - Jobhandling
+# ----------
+
+# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
+# -
+trap clean_up SIGHUP SIGINT SIGTERM
+
+# - Create lock directory '$LOCK_DIR"
+#
+mkdir "$LOCK_DIR"
+
+
+# ----------
+# - Some checks ..
+# ----------
+
+# - Running in a terminal?
+# -
+if [[ -t 1 ]] ; then
+   terminal=true
+else
+   fatal "Script must run in a terminal."
+fi
+
+
+# ==========
+# - Begin Main Script
+# ==========
+
+# ----------
+# - Headline
+# ----------
+
+if $terminal ; then
+   echo ""
+   echo -e "\033[1m----------\033[m"
+   echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
+   echo -e "\033[1m----------\033[m"
+fi
+
+
+# ----------
+#  Read Configurations from $conf_file
+# ----------
+
+
+# - Give your default values here
+# -
+DEFAULT_FQDN_HOSTNAME="$(hostname -f)"
+DEFAULT_GREENLIGTH_DIR="/usr/local/greenlight"
+
+if [[ -f "$conf_file" ]]; then
+   source "$conf_file"
+else
+   warn "No configuration file '$conf_file' present.\n
+             Loading default values.."
+fi
+
+[[ -n "$FQDN_HOSTNAME" ]] && DEFAULT_FQDN_HOSTNAME="$FQDN_HOSTNAME"
+[[ -n "$GREENLIGTH_DIR" ]] && DEFAULT_GREENLIGTH_DIR="$GREENLIGTH_DIR"
+
+
+blank_line
+echononl "Detect distribution/release of running OS.."
+detect_os > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+
+FQDN_HOSTNAME=
+echo ""
+echo -e "\033[32m--\033[m"
+echo ""
+echo "Insert full qualified hostname for BigBlueButton Service"
+echo ""
+if [[ -n "$DEFAULT_FQDN_HOSTNAME" ]]; then
+   while [[ "X${FQDN_HOSTNAME}" = "X" ]]; do
+      echononl "Full qualified hostname [${DEFAULT_FQDN_HOSTNAME}]: "
+      read FQDN_HOSTNAME
+      if [[ "X${FQDN_HOSTNAME}" = "X" ]]; then
+         FQDN_HOSTNAME=$DEFAULT_FQDN_HOSTNAME
+      fi
+      if [[ ! $FQDN_HOSTNAME =~ \. ]]; then
+         echo -e "\n\tGiven Host \033[33m\033[1m$FQDN_HOSTNAME\033[m seems not to be a full qualified hostname.\n"
+         FQDN_HOSTNAME=""
+      fi
+   done
+else
+   while [[ "X${FQDN_HOSTNAME}" = "X" ]]; do
+      echononl "Full qualified hostname: "
+      read FQDN_HOSTNAME
+      if [[ "X${FQDN_HOSTNAME}" = "X" ]]; then
+         echo -e "\n\t\033[33m\033[1mFull qualified hostname is reqired\033[m\n"
+      fi
+      if [[ ! $FQDN_HOSTNAME =~ \. ]]; then
+         echo -e "\n\tGiven Host \033[33m\033[1m$FQDN_HOSTNAME\033[m seems not to be a full qualified hostname.\n"
+         FQDN_HOSTNAME=""
+      fi
+   done
+fi
+HOSTNAME="${FQDN_HOSTNAME%%.*}"
+
+
+GREENLIGTH_DIR=
+echo ""
+echo -e "\033[32m--\033[m"
+echo ""
+echo "Give the path into install 'greelight':"
+echo ""
+if [[ -n "$DEFAULT_GREENLIGTH_DIR" ]]; then
+   while [[ "X${GREENLIGTH_DIR}" = "X" ]]; do
+      echononl "Full qualified hostname [${DEFAULT_GREENLIGTH_DIR}]: "
+      read GREENLIGTH_DIR
+      if [[ "X${GREENLIGTH_DIR}" = "X" ]]; then
+         GREENLIGTH_DIR=$DEFAULT_GREENLIGTH_DIR
+      fi
+      if [[ ! -d "$(dirname "$GREENLIGTH_DIR")"  ]]; then
+         echo -e "\n\tBase directory \033[33m\033[1m$(dirname "$GREENLIGTH_DIR")\033[m not found.\n"
+         GREENLIGTH_DIR=""
+      fi
+   done
+else
+   while [[ "X${GREENLIGTH_DIR}" = "X" ]]; do
+      echononl "Full qualified hostname: "
+      read GREENLIGTH_DIR
+      if [[ "X${GREENLIGTH_DIR}" = "X" ]]; then
+         echo -e "\n\t\033[33m\033[1mInstall directory is reqired\033[m\n"
+      fi
+      if [[ ! -d "$(dirname "$GREENLIGTH_DIR")"  ]]; then
+         echo -e "\n\tBase directory \033[33m\033[1m$(dirname "$GREENLIGTH_DIR")\033[m not found.\n"
+         GREENLIGTH_DIR=""
+      fi
+   done
+fi
+
+
+echo ""
+echo ""
+echo -e "\t\033[32mStart pre-install script for BigBlueButton Service with the following parameters\033[m"
+echo ""
+echo -e "\tFull qualified Hostname............: $FQDN_HOSTNAME"
+echo -e "\tHostname...........................: $HOSTNAME"
+echo ""
+echo -e "\tOS Distribution....................: $DIST"
+echo -e "\tDistribution's codename............: $DIST_CODENAME"
+echo ""
+echo -e "\tInstallation directory greenlight..: $GREENLIGTH_DIR"
+echo ""
+echononl "einverstanden (yes/no): "
+read OK
+OK=${OK,,}
+while [ "X$OK" != "Xyes" -a "X$OK" != "Xno" ]; do
+   echononl "Wrong entry! [yes/no]: "
+   read OK
+   OK=${OK,,}
+done
+[ $OK = "yes" ] || fatal Repeat with other settings..
+
+echo ""
+
+blank_line
+
+# Stop Service if started
+#
+echononl "Stop Greenlight Service.."
+if $(ps ax | grep -v grep | grep -q /usr/bin/docker-proxy ) ; then
+   cd $GREENLIGTH_DIR && docker-compose down > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+else
+   echo_skipped
+fi
+
+# Remove old versions of Docker
+#
+echononl "Remove old versions of Docker .."
+apt-get remove -y docker docker-engine docker.io containerd runc > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+
+# Install packages to allow apt to use a repository over HTTPS
+#
+echononl "Install packages to allow apt to use a repository over HTTPS .."
+apt-get install \
+   apt-transport-https \
+   ca-certificates \
+   curl \
+   gnupg-agent \
+   software-properties-common -y > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+blank_line
+
+
+# Add Docker’s official GPG key
+#
+echononl "Add Docker’s official GPG key .."
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg 2> "$log_file" | sudo apt-key add - >> "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+# Add Dockers stable repository
+#
+echononl "Add Dockers stable repositor .."
+cat <<EOF > /etc/apt/sources.list.d/docker.list 2> "$log_file"
+deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable
+EOF
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+# Update the apt package index.
+#
+echononl "Update the apt package index. .."
+apt-get update > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+# Install the latest version of Docker Engine - Community and containerd
+#
+echononl "Install the latest version of Docker Engine - Community and containerd .."
+DEBIAN_FRONTEND=noninteractive apt-get -y install docker-ce docker-ce-cli containerd.io > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+blank_line
+
+# Deinstall apparmor
+#
+# Needed if docker is running in a LX Conatiner
+#
+echononl "Deinstall apparmor - Needed because docker is running in a LX-Container .."
+DEBIAN_FRONTEND=noninteractive apt-get -y remove apparmor > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+
+blank_line
+
+# Create the Greenlight directory for its configuration to live in.
+#
+echononl "Create the Greenlight directory for its configuration to live in. .."
+if [[ -d "$GREENLIGTH_DIR" ]] ; then
+   echo_skipped
+else
+   mkdir "$GREENLIGTH_DIR" > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+fi
+
+echononl "Enter Greenlight directory .."
+cd "$GREENLIGTH_DIR" > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+
+# Greenlight will read its environment configuration from the .env file. To generate this 
+# file and install the Greenlight Docker image, run (inside greenlight directory):
+#
+#    docker run --rm bigbluebutton/greenlight:v2 cat ./sample.env > .env
+#
+_new_env=false
+echononl "Generate environment configuration and install Greenlight Docker image .."
+if [[ -s ${GREENLIGTH_DIR}/.env ]]; then
+   echo_skipped
+else
+   docker run --rm bigbluebutton/greenlight:v2 cat ./sample.env > .env 2> "$log_file"
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+      _new_env=true
+   fi
+fi
+
+
+# Greenlight needs a secret key in order to run in production. To generate this, run:
+#
+#    docker run --rm bigbluebutton/greenlight:v2 bundle exec rake secret
+#
+_secret_key_found=false
+echononl "Generating a Secret Key (in order to run in production).."
+if [[ -z "$(grep -E "^\s*SECRET_KEY_BASE\s*=" ${GREENLIGTH_DIR}/.env 2> /dev/null | cut -d '=' -f2)" ]] ; then
+   _greenlight_secret="$(docker run --rm bigbluebutton/greenlight:v2 bundle exec rake secret 2> "$log_file")"
+   if [[  -s "$log_file" ]] ; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+else
+   echo_skipped
+   _secret_key_found=true
+fi
+
+
+# Set 'SECRET_KEY_BASE' with generated Secret Key
+#
+_key="SECRET_KEY_BASE"
+_val="$_greenlight_secret"
+echononl "Set 'SECRET_KEY_BASE' env with generated Secret Key at file '.env'.."
+if $_secret_key_found ; then
+   echo_skipped
+else
+   perl -i -n -p -e "s/^(\s*${_key}\s*=.*)/##! \1\n${_key}=${_val}/" \
+      ${GREENLIGTH_DIR}/.env > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+fi
+
+
+# Get BigBlueButtons secret ..
+#
+echononl "Get BigBlueButtons secret .."
+_bbb_secret="$(bbb-conf --secret 2> $log_file | grep -i -E "^\s*Secret" 2> $log_file | awk '{print$2}' 2> $log_file)"
+if [[  -s "$log_file" ]] ; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+
+# Set 'BIGBLUEBUTTON_SECRET' with generated Secret Key
+#
+_key="BIGBLUEBUTTON_SECRET"
+_val="$_bbb_secret"
+echononl "Set 'BIGBLUEBUTTON_SECRET' env with BBB's Secret Key at file '.env'.."
+if $(grep -E -q "^\s*${_key}\s*=\s*${_val}" ${GREENLIGTH_DIR}/.env 2> /dev/null) ; then
+   echo_skipped
+else
+   perl -i -n -p -e "s/^(\s*${_key}\s*=.*)/##! \1\n${_key}=${_val}/" \
+      ${GREENLIGTH_DIR}/.env > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+fi
+
+
+# Get BigBlueButtons url ..
+#
+echononl "Get BigBlueButtons URL .."
+_bbb_url="$(bbb-conf --secret 2> $log_file | grep -i -E "^\s*URL" 2> $log_file | awk '{print$2}' 2> $log_file)"
+if [[  -s "$log_file" ]] ; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+
+# Set 'BIGBLUEBUTTON_ENDPOINT' with generated Secret Key
+#
+_key="BIGBLUEBUTTON_ENDPOINT"
+_val="$_bbb_url"
+echononl "Set 'BIGBLUEBUTTON_ENDPOINT' env with BBB's Secret Key at file '.env'.."
+if $(grep -E -q "^\s*${_key}\s*=\s*${_val}" ${GREENLIGTH_DIR}/.env 2> /dev/null) ; then
+   echo_skipped
+else
+   perl -i -n -p -e "s#^(\s*${_key}\s*=.*)#\#\#! \1\n${_key}=${_val}#" \
+      ${GREENLIGTH_DIR}/.env > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+fi
+
+
+# Set ALLOW_GREENLIGHT_ACCOUNTS
+#
+_key="ALLOW_GREENLIGHT_ACCOUNTS"
+_val="false"
+echononl "Set 'ALLOW_GREENLIGHT_ACCOUNTS' to false (file .env).."
+if $(grep -E -q "^\s*${_key}\s*=\s*${_val}" ${GREENLIGTH_DIR}/.env 2> /dev/null) ; then
+   echo_skipped
+else
+   perl -i -n -p -e "s#^(\s*${_key}\s*=.*)#\#\#! \1\n${_key}=${_val}#" \
+      ${GREENLIGTH_DIR}/.env > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+fi
+
+blank_line
+
+
+# randomly generate a password for the PostgreSQL database and replace the entries 
+# in the .env and docker-compose.yml
+#
+#   export pass=$(openssl rand -hex 8)
+#   sed -i 's/POSTGRES_PASSWORD=password/POSTGRES_PASSWORD='$_postgresql_pass'/g' docker-compose.yml
+#   sed -i 's/DB_PASSWORD=password/DB_PASSWORD='$_postgresql_pass'/g' .env
+#
+_postgresql_pass=""
+_pass_generated=false
+echononl "Generate password for the PostgreSQL database.."
+if $_new_env ; then
+   _postgresql_pass="$(openssl rand -hex 8 2> $log_file)"
+   if [[  -s "$log_file" ]] ; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+      _pass_generated=true
+   fi
+else
+   echo_skipped
+fi
+
+
+# Set DB_PASSWORD'
+#
+_key="DB_PASSWORD"
+_val="$_postgresql_pass"
+echononl "Set DB_PASSWORD (file .env).."
+if $_pass_generated ; then
+    perl -i -n -p -e "s#^(\s*${_key}\s*=.*)#\#\#! \1\n${_key}=${_val}#" \
+      ${GREENLIGTH_DIR}/.env > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+else
+   echo_skipped
+fi
+
+
+
+blank_line
+
+echononl "Verify the configuration settings (.env file).."
+cd "${GREENLIGTH_DIR}" \
+   && docker run --rm --env-file .env bigbluebutton/greenlight:v2 bundle exec rake conf:check > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+blank_line
+
+
+# Greenlight will be configured to deploy at the /b subdirectory. This is necessary so 
+# it doesn’t conflict with the other BigBlueButton components. The Nginx configuration 
+# for this subdirectory is stored in the Greenlight image. To add this configuration file 
+# to your BigBlueButton server, run:
+#
+#    docker run --rm bigbluebutton/greenlight:v2 cat ./greenlight.nginx | sudo tee /etc/bigbluebutton/nginx/greenlight.nginx
+#
+echononl "Add nginx configuration to BigBlueButton's service .."
+if [[ -f "/etc/bigbluebutton/nginx/greenlight.nginx" ]] ; then
+   echo_skipped
+else
+   docker run --rm bigbluebutton/greenlight:v2 cat ./greenlight.nginx \
+      > /etc/bigbluebutton/nginx/greenlight.nginx 2> $log_file
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+fi
+
+
+blank_line
+
+# Download the current stable release of Docker Compose:
+#
+echononl "Download the current stable release (v 1.25.4) of Docker Compose .."
+curl -L "https://github.com/docker/compose/releases/download/1.25.4/docker-compose-$(uname -s)-$(uname -m)" \
+   -o /usr/local/bin/docker-compose > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+echononl "Set executable bit to 'docker-compose'.."
+chmod +x /usr/local/bin/docker-compose > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+info "To install a different version of Compose, substitute 1.25.4 with the 
+             version of Compose you want to use."
+
+echononl "Create cronjob to start Greenlight service after booting the system.."
+if $(crontab -l 2>/dev/null | grep -q -E "^@reboot\s+.*\s+docker-compose up -d" 2> /dev/null) ; then
+   echo_skipped
+else
+   _crontab_tmp_file="${LOCK_DIR}/crontab_root.$$"
+   crontab -l > $_crontab_tmp_file 2> /dev/null
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo "" >> $_crontab_tmp_file
+      echo "# Start greenlight service (docker)" >> $_crontab_tmp_file
+      echo "#" >> $_crontab_tmp_file
+      echo "@reboot cd \"$GREENLIGTH_DIR\" && docker-compose up -d" >> $_crontab_tmp_file
+      crontab $_crontab_tmp_file > "$log_file" 2>&1
+      if [[ $? -ne 0 ]]; then
+         echo_failed
+         error "$(cat "$log_file")"
+      else
+         echo_ok
+      fi
+   fi
+fi
+
+blank_line
+
+
+echononl "Copy the docker-compose.yml file from the Greenlight image in to greenlight directory.."
+cd ${GREENLIGTH_DIR} \
+   && docker run --rm bigbluebutton/greenlight:v2 cat ./docker-compose.yml > docker-compose.yml 2> $log_file
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+echononl "Set 'POSTGRES_PASSWORD' (file docker-compose.yml).."
+if $_pass_generated ; then
+    sed -i 's/POSTGRES_PASSWORD=password/POSTGRES_PASSWORD='$_postgresql_pass'/g' \
+      ${GREENLIGTH_DIR}/docker-compose.yml > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+else
+   echo_skipped
+fi
+
+echononl "Start Greenlight service (vi docker).."
+cd ${GREENLIGTH_DIR} && docker-compose up -d > $log_file 2>&1
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+echononl "Restart nginx service.."
+systemctl restart nginx > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+
+
+blank_line
+
+note "To create an Administrator account with the default values, in the Greenlight directory, 
+            run the following command:
+            
+               # cd $GREENLIGTH_DIR
+               # \033[1mdocker exec greenlight-v2 bundle exec rake admin:create\033[m
+
+            If you would like to configure the name, email, or password of the Administrator account, 
+            replace the previous command with this:
+
+               # cd $GREENLIGTH_DIR
+               # \033[1mdocker exec greenlight-v2 bundle exec rake user:create[\"name\",\"email\",\"password\",\"admin\"]\033[m
+
+            Once the command has finished it will print the account’s email and password."
+
+note "Optionally, if you wish to have the default landing page at the root of your BigBlueButton 
+            server redirect to Greenlight, add the following entry to the bottom 
+            of /etc/nginx/sites-available/bigbluebutton just before the last } character.
+
+               \033[33mlocation = / {
+                  return 307 /b;
+               }\033[m
+
+            To have this change take effect, you must once again restart Nginx."
+
+
+clean_up 0
+
diff --git a/bbb-post-install.sh b/archive/bbb-post-install.sh
similarity index 100%
rename from bbb-post-install.sh
rename to archive/bbb-post-install.sh
diff --git a/archive/bbb-pre-install.sh b/archive/bbb-pre-install.sh
new file mode 100755
index 0000000..5b1d50b
--- /dev/null
+++ b/archive/bbb-pre-install.sh
@@ -0,0 +1,569 @@
+#!/usr/bin/env bash
+  
+script_name="$(basename $(realpath $0))"
+working_dir="$(dirname $(realpath $0))"
+
+#conf_file="${working_dir}/conf/${script_name%%.*}.conf"
+conf_file="${working_dir}/conf/bbb.conf"
+
+LOCK_DIR="/tmp/$(basename $0).$$.LOCK"
+log_file="${LOCK_DIR}/${script_name%%.*}.log"
+
+
+# ----------
+# Base Function(s)
+# ----------
+
+clean_up() {
+
+   # Perform program exit housekeeping
+   rm -rf "$LOCK_DIR"
+   blank_line
+   exit $1
+}
+
+echononl(){
+   if $terminal ; then
+      echo X\\c > /tmp/shprompt$$
+      if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
+         echo -e -n "   $*\\c" 1>&2
+      else
+         echo -e -n "   $*" 1>&2
+      fi
+      rm /tmp/shprompt$$
+   fi
+}
+fatal(){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[31m\033[1mFatal\033[m ] $*"
+   else
+      echo -e "   [ Fatal ] $*"
+   fi
+   echo ""
+   if $terminal ; then
+      echo -e "             \033[1mScript terminated\033[m.."
+   else
+      echo -e "             Script terminated.."
+   fi
+   echo ""
+   rm -rf $LOCK_DIR
+   exit 1
+}
+error (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[31m\033[1mError\033[m ] $*"
+   else
+      echo "   [ Error ] $*"
+   fi
+   echo ""
+}
+
+echo_ok() {
+   if $terminal ; then
+      echo -e "\033[85G[ \033[32mok\033[m ]"
+   fi
+}
+echo_failed(){
+   if $terminal ; then
+      echo -e "\033[85G[ \033[1;31mfailed\033[m ]"
+   fi
+}
+echo_skipped() {
+   if $terminal ; then
+      echo -e "\033[85G[ \033[33m\033[1mskipped\033[m ]"
+   fi
+}
+echo_wait(){
+   if $terminal ; then
+      echo -en "\033[85G[ \033[5m\033[1m..\033[m ]"
+   fi
+}
+
+trim() {
+    local var="$*"
+    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
+    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
+    echo -n "$var"
+}
+
+blank_line() {
+   if $terminal ; then
+      echo ""
+   fi
+}
+
+detect_os () {
+
+   if $(which lsb_release > /dev/null 2>&1) ; then
+
+      DIST="$(lsb_release -i | awk '{print tolower($3)}')"
+      DIST_VERSION="$(lsb_release -r | awk '{print tolower($2)}')"
+      DIST_CODENAME="$(lsb_release -c | awk '{print tolower($2)}')"
+
+      if [[ "$DIST" = "debian" ]]; then
+         if $(echo "$DIST_VERSION" | grep -q '\.') ; then
+            DIST_VERSION=$(echo "$DIST_VERSION" | cut --delimiter='.' -f1)
+         fi
+      fi
+
+   elif [[ -e "/etc/os-release" ]]; then
+
+      . /etc/os-release
+
+      DIST=$ID
+      DIST_VERSION=${VERSION_ID}
+
+   fi
+
+   # remove whitespace from DIST and DIST_VERSION
+   DIST="${DIST// /}"
+   DIST_VERSION="${DIST_VERSION// /}"
+
+}
+
+
+
+# ----------
+# - Jobhandling
+# ----------
+
+# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
+# -
+trap clean_up SIGHUP SIGINT SIGTERM
+
+# - Create lock directory '$LOCK_DIR"
+#
+mkdir "$LOCK_DIR"
+
+
+# ----------
+# - Some checks ..
+# ----------
+
+# - Running in a terminal?
+# -
+if [[ -t 1 ]] ; then
+   terminal=true
+else
+   fatal "Script must run in a terminal."
+fi
+
+
+# ==========
+# - Begin Main Script
+# ==========
+
+# ----------
+# - Headline
+# ----------
+
+if $terminal ; then
+   echo ""
+   echo -e "\033[1m----------\033[m"
+   echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
+   echo -e "\033[1m----------\033[m"
+fi
+
+
+# ----------
+#  Read Configurations from $conf_file
+# ----------
+
+
+# - Give your default values here
+# -
+DEFAULT_FQDN_HOSTNAME="$(hostname -f)"
+
+if [[ -f "$conf_file" ]]; then
+   source "$conf_file"
+else
+   warn "No configuration file '$conf_file' present.\n
+             Loading default values.."
+fi
+
+[[ -n "$FQDN_HOSTNAME" ]] && DEFAULT_FQDN_HOSTNAME="$FQDN_HOSTNAME"
+
+
+blank_line
+echononl "Detect distribution/release of running OS.."
+detect_os > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+
+FQDN_HOSTNAME=
+echo ""
+echo -e "\033[32m--\033[m"
+echo ""
+echo "Insert full qualified hostname for BigBlueButton Service"
+echo ""
+if [[ -n "$DEFAULT_FQDN_HOSTNAME" ]]; then
+   while [[ "X${FQDN_HOSTNAME}" = "X" ]]; do
+      echononl "Full qualified hostname [${DEFAULT_FQDN_HOSTNAME}]: "
+      read FQDN_HOSTNAME
+      if [[ "X${FQDN_HOSTNAME}" = "X" ]]; then
+         FQDN_HOSTNAME=$DEFAULT_FQDN_HOSTNAME
+      fi
+      if [[ ! $FQDN_HOSTNAME =~ \. ]]; then
+         echo -e "\n\tGiven Host \033[33m\033[1m$FQDN_HOSTNAME\033[m seems not to be a full qualified hostname.\n"
+         FQDN_HOSTNAME=""
+      fi
+   done
+else
+   while [[ "X${FQDN_HOSTNAME}" = "X" ]]; do
+      echononl "Full qualified hostname: "
+      read FQDN_HOSTNAME
+      if [[ "X${FQDN_HOSTNAME}" = "X" ]]; then
+         echo -e "\n\t\033[33m\033[1mFull qualified hostname is reqired\033[m\n"
+      fi
+      if [[ ! $FQDN_HOSTNAME =~ \. ]]; then
+         echo -e "\n\tGiven Host \033[33m\033[1m$FQDN_HOSTNAME\033[m seems not to be a full qualified hostname.\n"
+         FQDN_HOSTNAME=""
+      fi
+   done
+fi
+HOSTNAME="${FQDN_HOSTNAME%%.*}"
+
+echo ""
+echo ""
+echo -e "\t\033[32mStart pre-install script for BigBlueButton Service with the following parameters\033[m"
+echo ""
+echo -e "\tFull qualified Hostname..: $FQDN_HOSTNAME"
+echo -e "\tHostname.................: $HOSTNAME"
+echo ""
+echo -e "\tOS Distribution..........: $DIST"
+echo -e "\tDistribution's codename..: $DIST_CODENAME"
+echo ""
+echononl "einverstanden (yes/no): "
+read OK
+OK=${OK,,}
+while [ "X$OK" != "Xyes" -a "X$OK" != "Xno" ]; do
+   echononl "Wrong entry! [yes/no]: "
+   read OK
+   OK=${OK,,}
+done
+[ $OK = "yes" ] || fatal Repeat with other settings..
+
+echo ""
+echo ""
+
+
+
+
+# /etc/resolf.conf
+#
+#echononl "Remove symlink '/etc/resolv.conf'.."
+#if [[ -h "/etc/resolv.conf" ]]; then
+#	rm /etc/resolv.conf > $log_file 2>&1
+#	if [[ $? -ne 0 ]]; then
+#   	echo_failed
+#   	error "$(cat "$log_file")"
+#	else
+#   	echo_ok
+#	fi
+#else
+#	echo_skipped
+#fi
+#
+#echononl "Create new file '/etc/resolv.conf'.."
+#cat <<EOF > /etc/resolv.conf 2> $log_file
+#### Hetzner Online GmbH installimage
+## nameserver config
+#nameserver 213.133.100.100
+#nameserver 213.133.98.98
+#nameserver 213.133.99.99
+#nameserver 2a01:4f8:0:1::add:9898
+#nameserver 2a01:4f8:0:1::add:1010
+#nameserver 2a01:4f8:0:1::add:9999
+#EOF
+#if [[ $? -ne 0 ]]; then
+#	echo_failed
+#	error "$(cat "$log_file")"
+#else
+#	echo_ok
+#fi
+
+
+echononl "Set FQDN hostname (IPv4).."
+perl -i -n -p -e "s/^127\.0\.1\.1.*/127.0.1.1 $FQDN_HOSTNAME $HOSTNAME/" /etc/hosts > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+blank_line
+
+echononl "Create sources.list for '$DIST $DIST_CODENAME'.."
+cat <<EOF > /etc/apt/sources.list 2> "$log_file"
+deb http://archive.ubuntu.com/ubuntu ${DIST_CODENAME} main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu ${DIST_CODENAME}-updates main restricted universe multiverse
+
+deb http://security.ubuntu.com/ubuntu ${DIST_CODENAME}-security main restricted universe multiverse
+
+deb http://archive.ubuntu.com/ubuntu ${DIST_CODENAME}-backports main restricted universe multiverse
+EOF
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Update repositories.."
+apt-get update > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Upgrade System.."
+apt-get --yes dist-upgrade > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+blank_line
+
+
+# Set the locale of the server to 'en_US.UTF-8'.
+ 
+echononl "Install 'language-pack-en'.."
+apt-get install --yes language-pack-en > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Set the locale of the server to 'en_US.UTF-8'.."
+update-locale LANG=en_US.UTF-8 > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Set system environment to 'en_US.UTF-8'.."
+systemctl set-environment LANG=en_US.UTF-8 > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+blank_line
+
+
+# BigBlueButton’s components, such as Tomcat, need a source of entropy when starting up. 
+#
+echononl "Install 'haveged'.."
+apt-get install --yes haveged > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Install 'software-properties-common'.."
+apt-get install --yes software-properties-common -y > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+blank_line
+
+
+# Add reposototies for 'ffmpeg' (create recordings) and 'yq' (update YAML files)
+#
+# Note:
+#     The default version of ffmpeg in Ubuntu 16.04 is old and yq does not exist 
+#     in the default repositories
+#
+echononl "Add repository for 'ffmpeg' .."
+add-apt-repository ppa:bigbluebutton/support -y > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+echononl "Add repository for 'yq'.."
+add-apt-repository ppa:rmescandon/yq -y > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+echononl "Update repositories.."
+apt-get update > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Upgrade System.."
+apt-get --yes dist-upgrade > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+blank_line
+
+# add repository for mongodb
+#
+echononl "Add apt key for 'mongodb' repository.."
+wget -qO - https://www.mongodb.org/static/pgp/server-3.4.asc | sudo apt-key add - > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Add repository for 'mongodb'.."
+cat <<EOF > /etc/apt/sources.list.d/mongodb-org-3.4.list 2> "$log_file"
+deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu ${DIST_CODENAME}/mongodb-org/3.4 multiverse
+EOF
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Update repositories.."
+apt-get update > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Install mongo-db and curl .."
+apt-get install -y mongodb-org curl > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+blank_line
+
+
+# install nodejs
+#
+echononl "Trigger script to install the NodeSource Node.js 8.x LTS Carbon repo.."
+echo_wait
+curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash - > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+echononl "Install nodejs.."
+apt-get install -y nodejs > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+
+# apt-get key for BigBlueButton repository
+#
+echononl "Add apt key for BigBlueButton repository.."
+wget https://ubuntu.bigbluebutton.org/repo/bigbluebutton.asc -O- 2> "$log_file" | sudo apt-key add - > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+# add the repository for BigBlueButton 2.2 packages
+#
+echononl "Add repository for BigBlueButton 2.2 packages.."
+cat <<EOF > /etc/apt/sources.list.d/bigbluebutton.list 2> "$log_file"
+deb https://ubuntu.bigbluebutton.org/${DIST_CODENAME}-220/ bigbluebutton-${DIST_CODENAME} main
+EOF
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+
+echononl "Update repositories.."
+apt-get update > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+blank_line
+
+
+# Create 'override'-directory for service 'redis-server'
+#
+echononl "Create 'override'-directory for service 'redis-server'.."
+if [[ -d "/etc/systemd/system/redis-server.service.d" ]] ; then
+	echo_skipped
+else
+	mkdir /etc/systemd/system/redis-server.service.d
+	if [[ $? -ne 0 ]]; then
+		echo_failed
+		error "$(cat "$log_file")"
+	else
+		echo_ok
+	fi
+fi
+
+echononl "Create 'override'-file for service 'redis-server'.."
+cat <<EOF > /etc/systemd/system/redis-server.service.d/override.conf 2> "$log_file"
+[Service]
+PrivateDevices=no
+EOF
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+clean_up 0
diff --git a/bbb-greenlight-install.sh b/bbb-greenlight-install.sh
index 0a6e59e..c2ccce4 100755
--- a/bbb-greenlight-install.sh
+++ b/bbb-greenlight-install.sh
@@ -354,8 +354,8 @@ blank_line
 
 # Add Docker’s official GPG key
 #
-echononl "Add Docker’s official GPG key .."
-curl -fsSL https://download.docker.com/linux/ubuntu/gpg 2> "$log_file" | sudo apt-key add - >> "$log_file" 2>&1
+echononl "Add Docker's official GPG key .."
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg 2> "$log_file" | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg >> "$log_file" 2>&1
 if [[ $? -ne 0 ]]; then
 	echo_failed
 	error "$(cat "$log_file")"
@@ -363,11 +363,12 @@ else
 	echo_ok
 fi
 
+
 # Add Dockers stable repository
 #
 echononl "Add Dockers stable repositor .."
 cat <<EOF > /etc/apt/sources.list.d/docker.list 2> "$log_file"
-deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable
+deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable
 EOF
 if [[ $? -ne 0 ]]; then
 	echo_failed
@@ -400,21 +401,21 @@ fi
 
 blank_line
 
-# Deinstall apparmor
+## Deinstall apparmor
+##
+## Needed if docker is running in a LX Conatiner
+##
+#echononl "Deinstall apparmor - Needed because docker is running in a LX-Container .."
+#DEBIAN_FRONTEND=noninteractive apt-get -y remove apparmor > "$log_file" 2>&1
+#if [[ $? -ne 0 ]]; then
+#	echo_failed
+#	error "$(cat "$log_file")"
+#else
+#	echo_ok
+#fi
 #
-# Needed if docker is running in a LX Conatiner
 #
-echononl "Deinstall apparmor - Needed because docker is running in a LX-Container .."
-DEBIAN_FRONTEND=noninteractive apt-get -y remove apparmor > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-
-blank_line
+#blank_line
 
 # Create the Greenlight directory for its configuration to live in.
 #
@@ -563,6 +564,28 @@ else
 fi
 
 
+# Set SAFE_HOSTSA (Setting Allowed Hosts)
+#
+# For reasons related to security, you'll also need to specify the domain from 
+# which the application will be accessible from.
+#
+_key="SAFE_HOSTS"
+_val="${FQDN_HOSTNAME}"
+echononl "Set '${_key}' to '${_val}' (file .env).."
+if $(grep -E -q "^\s*${_key}\s*=\s*${_val}" ${GREENLIGTH_DIR}/.env 2> /dev/null) ; then
+   echo_skipped
+else
+   perl -i -n -p -e "s#^(\s*${_key}\s*=.*)#\#\#! \1\n${_key}=${_val}#" \
+      ${GREENLIGTH_DIR}/.env > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+fi
+
+
 # Set ALLOW_GREENLIGHT_ACCOUNTS
 #
 _key="ALLOW_GREENLIGHT_ACCOUNTS"
@@ -581,53 +604,6 @@ else
    fi
 fi
 
-blank_line
-
-
-# randomly generate a password for the PostgreSQL database and replace the entries 
-# in the .env and docker-compose.yml
-#
-#   export pass=$(openssl rand -hex 8)
-#   sed -i 's/POSTGRES_PASSWORD=password/POSTGRES_PASSWORD='$_postgresql_pass'/g' docker-compose.yml
-#   sed -i 's/DB_PASSWORD=password/DB_PASSWORD='$_postgresql_pass'/g' .env
-#
-_postgresql_pass=""
-_pass_generated=false
-echononl "Generate password for the PostgreSQL database.."
-if $_new_env ; then
-   _postgresql_pass="$(openssl rand -hex 8 2> $log_file)"
-   if [[  -s "$log_file" ]] ; then
-      echo_failed
-      error "$(cat "$log_file")"
-   else
-      echo_ok
-      _pass_generated=true
-   fi
-else
-   echo_skipped
-fi
-
-
-# Set DB_PASSWORD'
-#
-_key="DB_PASSWORD"
-_val="$_postgresql_pass"
-echononl "Set DB_PASSWORD (file .env).."
-if $_pass_generated ; then
-    perl -i -n -p -e "s#^(\s*${_key}\s*=.*)#\#\#! \1\n${_key}=${_val}#" \
-      ${GREENLIGTH_DIR}/.env > "$log_file" 2>&1
-   if [[ $? -ne 0 ]]; then
-      echo_failed
-      error "$(cat "$log_file")"
-   else
-      echo_ok
-   fi
-else
-   echo_skipped
-fi
-
-
-
 blank_line
 
 echononl "Verify the configuration settings (.env file).."
@@ -664,13 +640,23 @@ else
    fi
 fi
 
+echononl "Restart nginx service.."
+systemctl restart nginx > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
 
 blank_line
 
+
 # Download the current stable release of Docker Compose:
 #
-echononl "Download the current stable release (v 1.25.4) of Docker Compose .."
-curl -L "https://github.com/docker/compose/releases/download/1.25.4/docker-compose-$(uname -s)-$(uname -m)" \
+echononl "Download the current stable release (v 1.29.2) of Docker Compose .."
+curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" \
    -o /usr/local/bin/docker-compose > "$log_file" 2>&1
 if [[ $? -ne 0 ]]; then
    echo_failed
@@ -688,9 +674,89 @@ else
    echo_ok
 fi
 
-info "To install a different version of Compose, substitute 1.25.4 with the 
+info "To install a different version of Compose, substitute 1.29.2 with the 
              version of Compose you want to use."
 
+
+
+blank_line
+
+
+echononl "Copy the docker-compose.yml file from the Greenlight image in to greenlight directory.."
+cd ${GREENLIGTH_DIR} \
+   && docker run --rm bigbluebutton/greenlight:v2 cat ./docker-compose.yml > docker-compose.yml 2> $log_file
+if [[ $? -ne 0 ]]; then
+   echo_failed
+   error "$(cat "$log_file")"
+else
+   echo_ok
+fi
+
+blank_line
+
+
+# randomly generate a password for the PostgreSQL database and replace the entries 
+# in the .env and docker-compose.yml
+#
+#   export pass=$(openssl rand -hex 8)
+#   sed -i 's/POSTGRES_PASSWORD=password/POSTGRES_PASSWORD='$_postgresql_pass'/g' docker-compose.yml
+#   sed -i 's/DB_PASSWORD=password/DB_PASSWORD='$_postgresql_pass'/g' .env
+#
+_postgresql_pass=""
+_pass_generated=false
+echononl "Generate password for the PostgreSQL database.."
+if $_new_env ; then
+   _postgresql_pass="$(openssl rand -base64 24 2> $log_file)"
+   if [[  -s "$log_file" ]] ; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+      _pass_generated=true
+   fi
+else
+   echo_skipped
+fi
+
+
+echononl "Set 'POSTGRES_PASSWORD' (file docker-compose.yml).."
+if $_pass_generated ; then
+    sed -i 's/POSTGRES_PASSWORD=password/POSTGRES_PASSWORD='$_postgresql_pass'/g' \
+      ${GREENLIGTH_DIR}/docker-compose.yml > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+else
+   echo_skipped
+fi
+
+
+
+
+# Set DB_PASSWORD'
+#
+_key="DB_PASSWORD"
+_val="$_postgresql_pass"
+echononl "Set DB_PASSWORD (file .env).."
+if $_pass_generated ; then
+    perl -i -n -p -e "s#^(\s*${_key}\s*=.*)#\#\#! \1\n${_key}=${_val}#" \
+      ${GREENLIGTH_DIR}/.env > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
+else
+   echo_skipped
+fi
+
+
+blank_line
+
 echononl "Create cronjob to start Greenlight service after booting the system.."
 if $(crontab -l 2>/dev/null | grep -q -E "^@reboot\s+.*\s+docker-compose up -d" 2> /dev/null) ; then
    echo_skipped
@@ -717,31 +783,6 @@ fi
 
 blank_line
 
-
-echononl "Copy the docker-compose.yml file from the Greenlight image in to greenlight directory.."
-cd ${GREENLIGTH_DIR} \
-   && docker run --rm bigbluebutton/greenlight:v2 cat ./docker-compose.yml > docker-compose.yml 2> $log_file
-if [[ $? -ne 0 ]]; then
-   echo_failed
-   error "$(cat "$log_file")"
-else
-   echo_ok
-fi
-
-echononl "Set 'POSTGRES_PASSWORD' (file docker-compose.yml).."
-if $_pass_generated ; then
-    sed -i 's/POSTGRES_PASSWORD=password/POSTGRES_PASSWORD='$_postgresql_pass'/g' \
-      ${GREENLIGTH_DIR}/docker-compose.yml > "$log_file" 2>&1
-   if [[ $? -ne 0 ]]; then
-      echo_failed
-      error "$(cat "$log_file")"
-   else
-      echo_ok
-   fi
-else
-   echo_skipped
-fi
-
 echononl "Start Greenlight service (vi docker).."
 cd ${GREENLIGTH_DIR} && docker-compose up -d > $log_file 2>&1
 if [[ $? -ne 0 ]]; then
@@ -751,15 +792,6 @@ else
    echo_ok
 fi
 
-echononl "Restart nginx service.."
-systemctl restart nginx > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-   echo_failed
-   error "$(cat "$log_file")"
-else
-   echo_ok
-fi
-
 
 
 blank_line
@@ -776,7 +808,7 @@ note "To create an Administrator account with the default values, in the Greenli
                # cd $GREENLIGTH_DIR
                # \033[1mdocker exec greenlight-v2 bundle exec rake user:create[\"name\",\"email\",\"password\",\"admin\"]\033[m
 
-            Once the command has finished it will print the account’s email and password."
+            Once the command has finished it will print the account's email and password."
 
 note "Optionally, if you wish to have the default landing page at the root of your BigBlueButton 
             server redirect to Greenlight, add the following entry to the bottom 
diff --git a/bbb-pre-install.sh b/bbb-pre-install.sh
index 5b1d50b..ab14a9a 100755
--- a/bbb-pre-install.sh
+++ b/bbb-pre-install.sh
@@ -254,42 +254,6 @@ echo ""
 echo ""
 
 
-
-
-# /etc/resolf.conf
-#
-#echononl "Remove symlink '/etc/resolv.conf'.."
-#if [[ -h "/etc/resolv.conf" ]]; then
-#	rm /etc/resolv.conf > $log_file 2>&1
-#	if [[ $? -ne 0 ]]; then
-#   	echo_failed
-#   	error "$(cat "$log_file")"
-#	else
-#   	echo_ok
-#	fi
-#else
-#	echo_skipped
-#fi
-#
-#echononl "Create new file '/etc/resolv.conf'.."
-#cat <<EOF > /etc/resolv.conf 2> $log_file
-#### Hetzner Online GmbH installimage
-## nameserver config
-#nameserver 213.133.100.100
-#nameserver 213.133.98.98
-#nameserver 213.133.99.99
-#nameserver 2a01:4f8:0:1::add:9898
-#nameserver 2a01:4f8:0:1::add:1010
-#nameserver 2a01:4f8:0:1::add:9999
-#EOF
-#if [[ $? -ne 0 ]]; then
-#	echo_failed
-#	error "$(cat "$log_file")"
-#else
-#	echo_ok
-#fi
-
-
 echononl "Set FQDN hostname (IPv4).."
 perl -i -n -p -e "s/^127\.0\.1\.1.*/127.0.1.1 $FQDN_HOSTNAME $HOSTNAME/" /etc/hosts > "$log_file" 2>&1
 if [[ $? -ne 0 ]]; then
@@ -341,12 +305,16 @@ blank_line
 # Set the locale of the server to 'en_US.UTF-8'.
  
 echononl "Install 'language-pack-en'.."
-apt-get install --yes language-pack-en > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
+if $(dpkg -s language-pack-en > /dev/null 2>&1 ) ; then
+   echo_skipped
 else
-	echo_ok
+   apt-get install --yes language-pack-en > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
 fi
 
 echononl "Set the locale of the server to 'en_US.UTF-8'.."
@@ -373,197 +341,30 @@ blank_line
 # BigBlueButton’s components, such as Tomcat, need a source of entropy when starting up. 
 #
 echononl "Install 'haveged'.."
-apt-get install --yes haveged > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
+if $(dpkg -s haveged > /dev/null 2>&1 ) ; then
+   echo_skipped
 else
-	echo_ok
+   apt-get install --yes haveged > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
 fi
 
-echononl "Install 'software-properties-common'.."
-apt-get install --yes software-properties-common -y > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
+echononl "Install 'apt-utils'.."
+if $(dpkg -s apt-utils > /dev/null 2>&1 ) ; then
+   echo_skipped
 else
-	echo_ok
+   apt-get install --yes apt-utils > "$log_file" 2>&1
+   if [[ $? -ne 0 ]]; then
+      echo_failed
+      error "$(cat "$log_file")"
+   else
+      echo_ok
+   fi
 fi
 
-blank_line
-
-
-# Add reposototies for 'ffmpeg' (create recordings) and 'yq' (update YAML files)
-#
-# Note:
-#     The default version of ffmpeg in Ubuntu 16.04 is old and yq does not exist 
-#     in the default repositories
-#
-echononl "Add repository for 'ffmpeg' .."
-add-apt-repository ppa:bigbluebutton/support -y > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-   echo_failed
-   error "$(cat "$log_file")"
-else
-   echo_ok
-fi
-
-echononl "Add repository for 'yq'.."
-add-apt-repository ppa:rmescandon/yq -y > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-   echo_failed
-   error "$(cat "$log_file")"
-else
-   echo_ok
-fi
-
-echononl "Update repositories.."
-apt-get update > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-echononl "Upgrade System.."
-apt-get --yes dist-upgrade > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-blank_line
-
-# add repository for mongodb
-#
-echononl "Add apt key for 'mongodb' repository.."
-wget -qO - https://www.mongodb.org/static/pgp/server-3.4.asc | sudo apt-key add - > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-echononl "Add repository for 'mongodb'.."
-cat <<EOF > /etc/apt/sources.list.d/mongodb-org-3.4.list 2> "$log_file"
-deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu ${DIST_CODENAME}/mongodb-org/3.4 multiverse
-EOF
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-echononl "Update repositories.."
-apt-get update > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-echononl "Install mongo-db and curl .."
-apt-get install -y mongodb-org curl > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-blank_line
-
-
-# install nodejs
-#
-echononl "Trigger script to install the NodeSource Node.js 8.x LTS Carbon repo.."
-echo_wait
-curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash - > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-echononl "Install nodejs.."
-apt-get install -y nodejs > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-
-# apt-get key for BigBlueButton repository
-#
-echononl "Add apt key for BigBlueButton repository.."
-wget https://ubuntu.bigbluebutton.org/repo/bigbluebutton.asc -O- 2> "$log_file" | sudo apt-key add - > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-# add the repository for BigBlueButton 2.2 packages
-#
-echononl "Add repository for BigBlueButton 2.2 packages.."
-cat <<EOF > /etc/apt/sources.list.d/bigbluebutton.list 2> "$log_file"
-deb https://ubuntu.bigbluebutton.org/${DIST_CODENAME}-220/ bigbluebutton-${DIST_CODENAME} main
-EOF
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-
-echononl "Update repositories.."
-apt-get update > "$log_file" 2>&1
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
-
-blank_line
-
-
-# Create 'override'-directory for service 'redis-server'
-#
-echononl "Create 'override'-directory for service 'redis-server'.."
-if [[ -d "/etc/systemd/system/redis-server.service.d" ]] ; then
-	echo_skipped
-else
-	mkdir /etc/systemd/system/redis-server.service.d
-	if [[ $? -ne 0 ]]; then
-		echo_failed
-		error "$(cat "$log_file")"
-	else
-		echo_ok
-	fi
-fi
-
-echononl "Create 'override'-file for service 'redis-server'.."
-cat <<EOF > /etc/systemd/system/redis-server.service.d/override.conf 2> "$log_file"
-[Service]
-PrivateDevices=no
-EOF
-if [[ $? -ne 0 ]]; then
-	echo_failed
-	error "$(cat "$log_file")"
-else
-	echo_ok
-fi
 
 clean_up 0