diff --git a/doc/lib-header.txt b/doc/lib-header.txt
index 5d8cf28..d3c48f7 100644
--- a/doc/lib-header.txt
+++ b/doc/lib-header.txt
@@ -3,3 +3,9 @@
 [ -d "<LIBDIR>" ] || { echo "LIBDIR not exist"; exit 1; }
 
 #beginn func
+
+
+#this func is standalone executable
+[ -n "$1" ] && {
+    check_user
+}
diff --git a/src/func/check_update b/src/func/check_update
new file mode 100755
index 0000000..7a1847d
--- /dev/null
+++ b/src/func/check_update
@@ -0,0 +1,17 @@
+#!/bin/bash
+#remaster lib
+[ -d "<LIBDIR>" ] || { echo "LIBDIR not exist"; exit 1; }
+
+#check_update
+function check_update() {
+    if curl https://raw.githubusercontent.com/6543/remaster/master/changes/remaster.md | diff - <(zcat <ROOTDIR>/usr/share/doc/remaster/changelog.gz ); then
+			echo 'REMASTER: Aktuell'
+	else
+			echo 'REMASTER: Warning: neue Version verfügbar'
+    fi
+}
+
+#this func is standalone executable
+[ -n "$1" ] && {
+    check_update
+}
diff --git a/src/remaster.sh b/src/remaster.sh
index 1ae8b6d..60db4c6 100755
--- a/src/remaster.sh
+++ b/src/remaster.sh
@@ -90,6 +90,8 @@ function main_renew() {
   check_dependency
   error_level="$?"; [ "$error_level" != "0" ] && on_exit $error_level >> "$log_file"
 
+  check_update | tee -a "$log_file"
+
   [ "$distro" != "" ] && distro="_$distro"
 
   # 2. Entpacke ISO
@@ -237,6 +239,8 @@ function main_update_pxe() {
   check_user
   error_level="$?"; [ "$error_level" != "0" ] && on_exit $error_level >> "$log_file"
 
+  check_update | tee -a "$log_file"
+
   check_dependency
   error_level="$?"; [ "$error_level" != "0" ] && on_exit $error_level >> "$log_file"
 
@@ -357,6 +361,8 @@ function main_update_iso() {
   check_user
   error_level="$?"; [ "$error_level" != "0" ] && on_exit $error_level >> "$log_file"
 
+  check_update | tee -a "$log_file"
+
   check_dependency
   error_level="$?"; [ "$error_level" != "0" ] && on_exit $error_level >> "$log_file"
 
@@ -465,11 +471,6 @@ function main_update_iso() {
   on_exit 0
 }
 
-#remaster.sh update
-function main_update() {
-  main_update_pxe
-}
-
 #####################################################################################
 ################## F u n c t i o n s ################################################
 #####################################################################################