diff --git a/install_httpd-2.4.sh b/install_httpd-2.4.sh
index f176bd2..eb746d7 100755
--- a/install_httpd-2.4.sh
+++ b/install_httpd-2.4.sh
@@ -173,6 +173,16 @@ export MAKEFLAGS=-j$(expr `grep  "^processor" /proc/cpuinfo | sort -u | wc -l` +
 
 ## --- some functions
 ## ---
+clean_up() {
+
+   # Perform program exit housekeeping
+   if [[ -s "$_CRONTAB_BAKUP_FILE" ]]; then
+      crontab -u root $_CRONTAB_BAKUP_FILE
+   fi
+   rm -f $_CRONTAB_BAKUP_FILE
+   exit $1
+}
+
 echononl(){
    echo X\\c > /tmp/shprompt$$
    if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
@@ -189,7 +199,7 @@ fatal(){
    echo ""
    echo -e "\t\033[31m\033[1mInstalllation wird abgebrochen\033[m\033[m"
    echo ""
-   exit 1
+   clean_up 1
 }
 
 warn (){
@@ -217,6 +227,10 @@ echo_skipped() {
 ## --- END: functions
 
 
+trap clean_up SIGHUP SIGINT SIGTERM
+
+
+
 clear
 echo
 echo -e "\033[21G\033[32mInstallation script apache webserver \033[m"
@@ -2045,7 +2059,7 @@ if [ -f $_httpdconf ];then
    fi
 
    echo "" >> ${_logdir}/main.log
-   echo "## - Change ownership of '$MUTEX_DIR' to '$HTTPD_USER'.."
+   echo "## - Change ownership of '$MUTEX_DIR' to '$HTTPD_USER'.." >> ${_logdir}/main.log
    echo "## -" >> ${_logdir}/main.log
    echo "chown $HTTPD_USER $MUTEX_DIR" >> ${_logdir}/main.log
    echononl "\tChange ownership of '$MUTEX_DIR' to '$HTTPD_USER'.."
@@ -4215,4 +4229,4 @@ fi
 cd $pwd
 
 echo
-exit 0
+clean_up 0