diff --git a/action.sh b/action.sh
index ad40a50..837c9f7 100755
--- a/action.sh
+++ b/action.sh
@@ -3,28 +3,28 @@
 ########################################################################
 #  Copyright (C) 2016 Max Mehl <mail [at] mehl [dot] mx>
 ########################################################################
-#  
-#  This program is free software: you can redistribute it and/or modify 
-#  it under the terms of the GNU Affero General Public License as 
-#  published by the Free Software Foundation, either version 3 of the 
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU Affero General Public License as
+#  published by the Free Software Foundation, either version 3 of the
 #  License, or (at your option) any later version.
-#  
-#  This program is distributed in the hope that it will be useful, 
-#  but WITHOUT ANY WARRANTY; without even the implied warranty of 
-#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #  GNU Affero General Public License for more details.
-#  
-#  You should have received a copy of the GNU Affero General Public 
-#  License along with this program.  If not, see 
+#
+#  You should have received a copy of the GNU Affero General Public
+#  License along with this program.  If not, see
 #  <http://www.gnu.org/licenses/>.
-#  
+#
 ########################################################################
-#  
+#
 #  This script handles calls from submit.php.
 #  It checks the validity of usernames, executes basic command
 #  When password entries are required, it starts the respective python
 #   scripts
-#  
+#
 ########################################################################
 
 # Test if config.cfg exists and set needed variables
@@ -40,8 +40,8 @@ PATH=$PATH:$HOME/bin
 ## FUNCTIONS
 function checkaction {
   REGEX="^adduser$|^changepw$|^listusers$|^userdetail$|^deluser$|^sizeall$|^sizeuser$|^viewdata$|^addalias$|^quota$|^installwp$|^uninstallwp$"
-  if [[ $1 =~ $REGEX ]]; then 
-    echo "true" 
+  if [[ $1 =~ $REGEX ]]; then
+    echo "true"
   else
     echo "false"
   fi
@@ -49,8 +49,8 @@ function checkaction {
 
 function checkuser {
   REGEX="^[A-Za-z0-9._+-]+$"    # Allowed symbols
-  if [[ $1 =~ $REGEX ]]; then 
-    echo "true" 
+  if [[ $1 =~ $REGEX ]]; then
+    echo "true"
   else
     echo "false"
   fi
@@ -58,8 +58,8 @@ function checkuser {
 
 function checkpass {
   REGEX="[ '\\]"   # Not allowed symbols
-  if [[ $(grep -E "$REGEX" $1 ; echo $?) == 1 ]]; then 
-    echo "true" 
+  if [[ $(grep -E "$REGEX" $1 ; echo $?) == 1 ]]; then
+    echo "true"
   else
     echo "false"
   fi
@@ -74,7 +74,7 @@ function userexists {
   fi
 }
 
-function mailsend { 
+function mailsend {
   TOEMAIL="$TOEMAIL";
   FREMAIL="$FREMAIL";
   SUBJECT="[$DOMAIN] $1";
@@ -95,14 +95,14 @@ $MSGBODY2
 }
 
 function mailsendenc {
-  
+
   if [ ! -e $SSLKEY ]; then
     #echo "Encryption key \"$SSLKEY\" is not available. Aborting."
     #exit 1
-    
+
     openssl genrsa -out $SSLKEY 2048
   fi
-  
+
   TOEMAIL="$TOEMAIL";
   FREMAIL="$FREMAIL";
   SUBJECT="[$DOMAIN] $1";
@@ -124,8 +124,8 @@ Content-Disposition: inline
 
 $MSGBODY1
 
-Upload the attached encrypted file to your Account Administration Panel 
-in order to see sensitive details. Please visit the section \"Decrypt 
+Upload the attached encrypted file to your Account Administration Panel
+in order to see sensitive details. Please visit the section \"Decrypt
 system email\" for more details.
 
 --${BOUNDARY}
@@ -142,7 +142,7 @@ $ATTACHMENT
   rm $MAILTMP;
 }
 
-function notesdelete { 
+function notesdelete {
   USER="$1"
   # Extract Mail part | exclude LEAD and TAIL | delete user
   sed -n "/$LEAD/,/$TAIL/ p" $NOTES | grep -v "$LEAD\|$TAIL" | sed "/User:[ \t]*$USER$/,+2d" > $NOTESTMP
@@ -156,10 +156,10 @@ function notesinsert {
   # Update datasheet (add new entry in Email section)
   USER=$1
   PASSFILE=$2
-  
+
   # Create temporary file from $PASSFILE
   sed -E "s/(.*)/User:     $USER\nPass:     \1\n\n/" $PASSFILE > .$PASSFILE.tmp
-  
+
   # Insert this edited file into the datasheet
   sed -i "/$TAIL/ {
          h
@@ -184,34 +184,34 @@ fi
 if [ "$ACTION" == "adduser" ]; then
   echo "Adding new Email user..."
   echo
-  
+
   if ! $(checkuser "$USER"); then
     echo "Username \"$USER\" invalid"
     exit 1
   fi
-  
+
   if $(userexists "$USER"); then
     echo "User \"$USER\" does already exist!"
     exit 1
   fi
-  
+
   if ! $(checkpass "$PASSFILE"); then
     echo "Password \""$(cat $PASSFILE)"\" invalid"
     exit 1
   fi
-  
+
   python adduser.py "$USER" "$PASSFILE"
-  
+
   if [ $? == 0 ]; then
     # Send infomail
     $MAILTYPE "New Email account created" \
              "A new Email account has been created." \
              "User: $USER"
-    
+
     LEAD='## > EMAIL'
     TAIL='## < EMAIL'
     notesinsert "$USER" "$PASSFILE"
-  
+
   fi
 fi # /adduser
 
@@ -221,26 +221,26 @@ fi # /adduser
 if [ "$ACTION" == "addalias" ]; then
   echo "Extracting details of Email account..."
   echo
-  
+
   DEST=$PASS
-  
+
   if ! $(checkuser "$USER"); then
     echo "Username \"$USER\" invalid"
     exit 1
   fi
-  
+
   if $(userexists "$USER"); then
     echo "User \"$USER\" does already exist!"
     exit 1
   fi
-  
+
   if ! $(userexists "$DEST"); then
     echo "Destination account \"$DEST\" does not exist!"
     exit 1
   fi
-  
+
   vaddalias $USER $DEST
-  
+
 fi # /addalias
 
 # # # # #
@@ -249,19 +249,19 @@ fi # /addalias
 if [ "$ACTION" == "changepw" ]; then
   echo "Changing password of Email account..."
   echo
-  
+
   if ! $(userexists "$USER"); then
     echo "User \"$USER\" does not exist!"
     exit 1
   fi
-  
+
   if ! $(checkpass "$PASSFILE"); then
     echo "Password \""$(cat $PASSFILE)"\" invalid"
     exit 1
   fi
-  
+
   python changepw.py "$USER" "$PASSFILE"
-  
+
   if [ $? == 0 ]; then
     # Send infomail
     $MAILTYPE "Email password changed" \
@@ -272,10 +272,10 @@ if [ "$ACTION" == "changepw" ]; then
     # In fact a combination of deluser and adduser
     LEAD='## > EMAIL'
     TAIL='## < EMAIL'
-    
-    notesdelete "$USER" 
+
+    notesdelete "$USER"
     notesinsert "$USER" "$PASSFILE"
-    
+
   fi
 fi # /changepw
 
@@ -285,9 +285,9 @@ fi # /changepw
 if [ "$ACTION" == "listusers" ]; then
   echo "Listing all Email accounts..."
   echo
-  
+
   listvdomain | column -s $' ' -t
-  
+
 fi # /listusers
 
 # # # # #
@@ -296,9 +296,9 @@ fi # /listusers
 if [ "$ACTION" == "sizeall" ]; then
   echo "Calculate total size of all Email accounts..."
   echo
-  
+
   du -sBM ~/users/* | sed -e "s:/home/$SYSUSER/users/::g"
-  
+
 fi # /sizeall
 
 # # # # #
@@ -307,9 +307,9 @@ fi # /sizeall
 if [ "$ACTION" == "viewdata" ]; then
   echo "Extracting data sheet..."
   echo
-  
+
   cat $NOTES
-  
+
 fi # /viewdata
 
 # # # # #
@@ -318,10 +318,10 @@ fi # /viewdata
 if [ "$ACTION" == "sizeuser" ]; then
   echo "Calculate size of all folders of an Email account..."
   echo
-  
+
   # Show size in MB, strip long paths, strip tmp and new folders, rename .INBOX cur-folder
   du -BM ~/users/"$USER" | sed -e "s:/home/$SYSUSER/users/$USER/::g" | grep -v "/cur$\|new$\|tmp$" | sed "s:cur$:.INBOX:" | grep -v "/home/$SYSUSER/users/$USER" | sort -nr
-  
+
 fi # /sizeuser
 
 # # # # #
@@ -330,14 +330,14 @@ fi # /sizeuser
 if [ "$ACTION" == "userdetail" ]; then
   echo "Extracting details of Email account..."
   echo
-  
+
   if ! $(userexists "$USER"); then
     echo "User \"$USER\" does not exist!"
     exit 1
   fi
-  
+
   dumpvuser "$USER" | column -s $' ' -t
-  
+
 fi # /userdetail
 
 # # # # #
@@ -346,26 +346,26 @@ fi # /userdetail
 if [ "$ACTION" == "quota" ]; then
   echo "Calculating account disk usage..."
   echo
-  
-  USAGE=$(quota -gsl | tail -n 1 | awk -F" " '{ print $2 }')
+
+  USAGE=$(quota -gsl | tail -n 1 | awk -F" " '{ print $2 }' | sed 's/[A-Za-z]//g')
   QUOTA=$(quota -gsl | tail -n 1 | awk -F" " '{ print $3 }' | sed 's/[A-Za-z]//g')
-  
+
   # If smaller than 1M, set usage to 1M to avoid miscalcuations
-  if [ $(echo $USAGE | grep -q "[A-Za-z]$" ; echo $?) != 0 ]; then
+  if ! echo $USAGE | grep -q "[A-Za-z]$"; then
     USAGE="1"
   else
     USAGE=$(echo $USAGE | sed 's/[A-Za-z]//g')
   fi
-  
+
   PERC=$(echo "scale=2; $USAGE/$QUOTA" | bc)
   PERC=$(echo "scale=2; $PERC*100" | bc)
-  
+
   echo "$USAGE MB of $QUOTA MB are used ($PERC %)."
-  
+
   PERC=$(echo "scale=2; 100 - $PERC" | bc)
-  
+
   echo "You have "$[$QUOTA - $USAGE]" MB free ($PERC %)."
-  
+
 fi # /quota
 
 # # # # #
@@ -374,26 +374,26 @@ fi # /quota
 if [ "$ACTION" == "deluser" ]; then
   echo "Extracting details of Email account..."
   echo
-  
+
   if ! $(userexists "$USER"); then
     echo "User \"$USER\" does not exist!"
     exit 1
   fi
-  
+
   vdeluser "$USER"
-  
+
   if [ $? == 0 ]; then
     # Send infomail
     $MAILTYPE "Email account deleted" \
              "An Email account has been deleted." \
              "User: $USER"
-    
+
     # Update datasheet (delete entry in Email section)
     LEAD='## > EMAIL'
     TAIL='## < EMAIL'
-    
-    notesdelete "$USER" 
-  
+
+    notesdelete "$USER"
+
   fi
 fi # /deluser
 
@@ -403,15 +403,15 @@ fi # /deluser
 if [ "$ACTION" == "installwp" ]; then
   echo "Installing WordPress..."
   echo
-  
+
   # $USER: Username for Wordpress
   # $PASS: Email address for Wordpress user
-  
+
   if ! $(checkuser "$USER"); then
     echo "Username \"$USER\" invalid"
     exit 1
   fi
-  
+
   WEBDIR=$HOME/html
   WPUSER=$USER
   WPPASS=$(apg -n 1 -M NCL -m 14)
@@ -434,7 +434,7 @@ if [ "$ACTION" == "installwp" ]; then
     echo "The default database \"${USER}_wp\" already exists."
     exit 1
   fi
-  
+
   # Downloading wordpress
   wget $WPDL
   unzip $(basename $WPDL)
@@ -448,7 +448,7 @@ if [ "$ACTION" == "installwp" ]; then
 
   # Create database
   mysql -e "CREATE DATABASE $MYSQLDB;"
-  
+
   # Use wp-cli to create config.php and install WP
   wp-cli core config --dbname=${MYSQLDB} --dbpass=${MYSQLPASS} --dbuser=${MYSQLUSER} --path=${WEBDIR}
   wp-cli core install --url="$WPDOMAIN" --title="CHANGE THIS TITLE" --admin_user=${WPUSER} --admin_password=${WPPASS} --admin_email=${WPMAIL} --path=${WEBDIR}
@@ -456,12 +456,12 @@ if [ "$ACTION" == "installwp" ]; then
   # Update datasheet
   TAIL='## < WORDPRESS'
   sed -i "/$TAIL/i User:     $WPUSER\nPass:     $WPPASS\n" $NOTES
-  
+
   echo
   echo "Wordpress successfully installed to $WPDOMAIN"
   echo "You can login on $WPDOMAIN/wp-login.php"
   echo "Please take a look into your data sheet for the login data."
-  
+
 fi # /installwp
 
 # # # # #
@@ -470,15 +470,15 @@ fi # /installwp
 if [ "$ACTION" == "uninstallwp" ]; then
   echo "Uninstalling WordPress..."
   echo
-  
+
   # $USER: Username for Wordpress
   # $PASS: Email address for Wordpress user
-  
+
   WEBDIR=$HOME/html
 
   MYSQLUSER=$SYSUSER
   MYSQLDB=${MYSQLUSER}_wp
-  
+
   # Delete database and content of ~/htmp
   mysql -e "DROP DATABASE ${MYSQLDB};"
   rm -rf $WEBDIR/*
@@ -487,10 +487,10 @@ if [ "$ACTION" == "uninstallwp" ]; then
   # Update datasheet
   LEAD='## > WORDPRESS'
   TAIL='## < WORDPRESS'
-  
+
   notesdelete ".*"
-  
+
   echo
   echo "Wordpress successfully uninstalled."
-  
+
 fi # /uninstallwp