diff --git a/check-disk-usage.sh b/check-disk-usage.sh
new file mode 100755
index 0000000..5890cc7
--- /dev/null
+++ b/check-disk-usage.sh
@@ -0,0 +1,416 @@
+#!/usr/bin/env bash
+
+# ----------
+# - Some script variables (Default values other variables see below)
+# ----------
+
+script_name="$(basename $(realpath $0))"
+working_dir="$(dirname $(realpath $0))"
+
+conf_file="${working_dir}/conf/${script_name%%.*}.conf"
+
+LOCK_DIR="/tmp/${script_name%%.*}.LOCK"
+log_file="${LOCK_DIR}/${script_name%%.*}.log"
+
+
+# ----------
+# Base Function(s)
+# ----------
+
+usage() {
+
+
+   [[ -n  "$1" ]] && error "$1"
+
+
+   [[ $terminal ]] && echo -e "
+\033[1mUsage:\033[m
+
+   $(basename $0) [-c <integer>}
+
+\033[1mDescription\033[m
+
+   Script wwarns if disk usage exceeds a given or default value (percent)
+
+\033[1mOptions\033[m
+
+   -c <integer)
+      a critical value in percent. if disc usage reaches this value, a warn e-mail
+      to given e-mail adresse(s) will be send.
+
+      Default e-mail adresse(s):
+        ${DEFAULT_ALERT_EMAIL_ADDRESSES}
+
+   -h
+      Prints this help.
+
+\033[1mFiles\033[m
+
+   $conf_file: Configuration file
+
+\033[1mExample:\033[m
+
+   warn if disc usage exceeds 80%
+
+      $(basename $0) -c 80
+
+"
+
+   clean_up 1
+
+}
+
+
+clean_up() {
+
+   # Perform program exit housekeeping
+   rm -rf "$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 ]: $*"
+      echo ""
+      echo -e "   \033[31m\033[1mScript was interupted\033[m!"
+   else
+      echo "   [ Fatal ]: $*"
+      echo ""
+      echo "              Script was terminated...."
+   fi
+   echo ""
+   clean_up 1
+}
+error (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[31m\033[1mError\033[m ]: $*"
+   else
+      echo "[ Error ]: $*"
+   fi
+   echo ""
+}
+
+warn (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[33m\033[1mWarning\033[m ]: $*"
+   else
+      echo "[ Warning ]: $*"
+   fi
+   echo ""
+}
+
+warn_only_terminal () {
+   if $terminal ; then
+      echo ""
+      echo -e "   [ \033[33m\033[1mWarning\033[m ]: $*"
+      echo ""
+   fi
+}
+
+info (){
+   if $terminal ; then
+      echo ""
+      echo -e "   [ \033[32m\033[1mInfo\033[m ]  $*"
+      echo ""
+   fi
+}
+
+ok (){
+   if $terminal ; then
+      echo ""
+      echo -e "   [ \033[32m\033[1mOk\033[m ]    $*"
+      echo ""
+   fi
+}
+echo_done() {
+   if $terminal ; then
+      echo -e "\033[75G[ \033[32mdone\033[m ]"
+   fi
+}
+echo_ok() {
+   if $terminal ; then
+      echo -e "\033[75G[ \033[32mok\033[m ]"
+   fi
+}
+echo_warn() {
+   if $terminal ; then
+      echo -e "\033[75G[ \033[33mwarn\033[m ]"
+   fi
+}
+echo_failed(){
+   if $terminal ; then
+      echo -e "\033[75G[ \033[1;31mfailed\033[m ]"
+   fi
+}
+echo_skipped() {
+   if $terminal ; then
+      echo -e "\033[75G[ \033[90m\033[1mskipped\033[m ]"
+   fi
+}
+echo_wait(){
+   if $terminal ; then
+      echo -en "\033[75G[ \033[5m\033[1m...\033[m ]"
+   fi
+}
+
+trim() {
+    local var="$*"
+    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
+}
+
+is_number() {
+
+   return $(test ! -z "${1##*[!0-9]*}" > /dev/null 2>&1);
+
+   # - also possible
+   # -
+   i#[[ ! -z "${1##*[!0-9]*}" ]] && return 0 || return 1
+   #retuon $([[ ! -z "${1##*[!0-9]*}" ]])
+}
+
+
+# ----------
+# - Some checks ..
+# ----------
+
+# - Running in a terminal?
+# -
+if [[ -t 1 ]] ; then
+   terminal=true
+else
+   terminal=false
+fi
+terminal=false
+
+
+# ==========
+# - Begin Main Script
+# ==========
+
+# ----------
+# - Headline
+# ----------
+
+if $terminal ; then
+   clear
+   echo ""
+   echo -e "\033[1m----------\033[m"
+   echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
+   echo -e "\033[1m----------\033[m"
+fi
+
+
+
+# ----------
+#  Read Configurations from $conf_file
+# ----------
+
+# - Give your default values here
+# -
+DEFAULT_ADMIN_EMAIL="argus@oopen.de"
+
+DEFAULT_COMPANY="O.OPEN"
+
+DEFAULT_CONTENT_TYPE='Content-Type: text/plain;\n charset="utf-8"'
+DEFAULT_SENDER_ADDRESS="${script_name%%.*}@$(hostname -f)"
+DEFAULT_ALERT_EMAIL_ADDRESSES="ckubu@oopen.de"
+DEFAULT_WARN_VALUE=85%
+
+# - Print help?
+# -
+if [[ "$(trim $*)" = "--help" ]] || [[ "$(trim $*)" = "-help" ]] || [[ "$(trim $*)" = "help" ]] ; then
+    usage
+fi
+
+
+
+if [[ -f "$conf_file" ]]; then
+   source "$conf_file"
+else
+   warn_only_terminal  "No configuration file '$conf_file' present.\n
+                Loading default values.."
+fi
+
+[[ -n "${WARN_VALUE}" ]] || WARN_VALUE="${DEFAULT_WARN_VALUE}"
+
+[[ -n "${ADMIN_EMAIL}" ]] || ADMIN_EMAIL="${DEFAULT_ADMIN_EMAIL}"
+[[ -n "${COMPANY}" ]] || COMPANY="${DEFAULT_COMPANY}"
+
+[[ -n "${ALERT_EMAIL_ADDRESSES}" ]] || ALERT_EMAIL_ADDRESSES="${DEFAULT_ALERT_EMAIL_ADDRESSES}"
+[[ -n "${CONTENT_TYPE}" ]] || CONTENT_TYPE="${DEFAULT_CONTENT_TYPE}"
+[[ -n "${SENDER_ADDRESS}" ]] || SENDER_ADDRESS="${DEFAULT_SENDER_ADDRESS}"
+
+
+WARN_VALUE="${WARN_VALUE%\%}"
+
+if ! $(is_number ${WARN_VALUE}) ; then
+   fatal "Given value for \033[1mWARN_VALUE\033[m (\033[1m${WARN_VALUE}\033[m) isn't a number!"
+fi
+
+SUBJECT="[ Warning ] Hard disk storage on $(hostname -f) exceeds ${WARN_VALUE}%"
+
+# ----------
+# - Read commandline parameter
+# ----------
+
+while getopts c:h opt ; do
+   case $opt in
+      c)    WARN_VALUE="${OPTARG}"
+            WARN_VALUE="${WARN_VALUE%\%}"
+            ;;
+      h)    usage
+            ;;
+      \?)   usage ;;
+   esac
+done
+
+
+# - Commandline parameter overwrites those given at configuration file
+# -
+if ! $(is_number ${WARN_VALUE}) ; then
+   fatal "Given value for \033[1mWARN_VALUE\033[m at commandline option \033[1m-c\033[m (\033[1m${WARN_VALUE}\033[m) isn't a number!"
+fi
+
+
+if [[ -n "$(trim ${ALERT_EMAIL_ADDRESSES})" ]] ; then
+   for _email in $ALERT_EMAIL_ADDRESSES ; do
+      alert_email_arr+=("$_email")
+   done
+fi
+
+
+# ----------
+# - Jobhandling
+# ----------
+
+# - If job already runs, stop execution..
+# -
+if mkdir "$LOCK_DIR" 2> /dev/null ; then
+
+   ## - Remove lockdir when the script finishes, or when it receives a signal
+   trap "clean_up 1" SIGHUP SIGINT SIGTERM
+
+else
+
+   datum="$(date +"%d.%m.%Y %H:%M")"
+
+   msg="[ Error ]: A previos instance of \"`basename $0`\" seems already be running.\n\n           Exiting now.."
+
+   echo ""
+   echo "[ Error ]: A previos instance of that script \"`basename $0`\" seems already be running."
+   echo ""
+   echo -e "           Exiting now.."
+   echo ""
+
+   echo -e "To:${ADMIN_EMAIL}\n${CONTENT_TYPE}\nSubject:Error cronjob `basename $0` -- $datum\n${msg}\n" \
+      | sendmail -F "Error `hostname -f`" -f ${SENDER_ADDRESS} ${ADMIN_EMAIL}
+
+   exit 1
+
+fi
+blank_line
+
+msg=""
+found=false
+while IFS='' read -r _line || [[ -n $_line ]] ; do
+
+   read -ra _addr <<< "$_line"
+    
+   _device="${_addr[1]}"
+   _dir="${_addr[2]}"
+
+   _tmp_percent="${_addr[0]}"
+   declare -i _percent="${_tmp_percent%\%}"
+
+
+   if [[ ${_percent} -gt ${WARN_VALUE} ]] ; then
+
+      #echo -e "\033[3G${_device}\033[15G -> ${_dir}\033[25G ${_percent}%"
+      if [[ -z "${msg}" ]]; then
+         msg="\n   The hard disk space on Device '${_device}' mounted at '${_dir}' is '${_percent}'% full!\n"
+      else
+         msg+="\n   The hard disk space on Device '${_device}' mounted at '${_dir}' is '${_percent}'% full!\n"
+      fi
+
+      if ! ${found} && ${terminal} ; then
+         echo -e "   Host: \033[1m$(hostname -f)\033[m"
+      fi
+      warn_only_terminal "The hard disk space on Device \033[1m${_device}\033[m mounted at \033[1m${_dir}\033[m is \033[1;31m${_percent}% full!\033[m"
+
+      found=true
+
+   fi
+
+done < <(df -H | grep -vE '^Dateisystem|Filesystem|tmpfs|cdrom|loop|udev' | awk '{ print $5 " " $1 " " $6 }')
+
+if $found ; then
+
+   if $(which lxc-ls > /dev/null) ; then
+
+      _guest_machines="$(lxc-ls)"
+
+
+      if [[ ${#_guest_machines} -gt 0 ]]; then
+
+         if ${terminal}; then
+            echo -e "   LX Guest Systems:"
+         fi
+
+         msg_guests="LX Guest Systems:"
+
+         for _name in ${_guest_machines} ; do
+
+            _state="$(lxc-info -n ${_name} | grep -i 'State:' | awk '{print$2}')"
+
+            msg_guests="${msg_guests}\n   (${_state}:) ${_name}"
+
+            if ${terminal}; then
+               echo -e "      (${_state}:) ${_name}"
+            fi
+
+         done
+
+
+      fi # if [[ ${#_guest_machines} -gt 0 ]]
+
+   fi # if $(which lxc-ls > /dev/null)
+
+   SUBJECT="[ Warning ] Hard disk storage on $(hostname -f) exceeds ${WARN_VALUE}%"
+   SUBJECT_UTF8="$(echo "${SUBJECT}" | iconv -t UTF8)"
+   SUBJECT_UTF8_ENCODED="=?utf-8?B?$(echo ${SUBJECT_UTF8} | base64  --wrap=0)?="
+
+   for _email in ${alert_email_arr[@]} ; do
+      echo -e "To:${_email}\n${CONTENT_TYPE}\nSubject:${SUBJECT_UTF8_ENCODED}\n\nHost: $(hostname -f)\n${msg}\n${msg_guests}" | /usr/sbin/sendmail -F "${COMPANY} -- hard disk usage" -f ${SENDER_ADDRESS} ${_email}
+   done
+
+else
+   info "Harddisk usage on host \033[1m$(hostname -f)\033[m is fine."
+fi
+
+clean_up 0