diff --git a/DEBIAN/control b/DEBIAN/control
index 8580391..e35de60 100644
--- a/DEBIAN/control
+++ b/DEBIAN/control
@@ -1,6 +1,6 @@
 Package: remaster
 Source: remaster
-Version: 2.0.0
+Version: 2.0.2
 Architecture: all
 Maintainer: 6543 <6543@obermui.de>
 Installed-Size: <SIZE>
diff --git a/autogen.sh b/autogen.sh
index d9b6286..377d025 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -104,6 +104,7 @@ function build-deb() {
     version="`cat build/DEBIAN/control | grep Version | cut -d " " -f 2`"
     arch="`cat build/DEBIAN/control | grep Arch | cut -d " " -f 2`"
     [ -f "release/remaster_"$version"_"$arch".deb" ] && rm "release/remaster_"$version"_"$arch".deb"
+    mkdir -p release
     mv -v "build.deb" "release/remaster_"$version"_"$arch".deb"
 }
 
diff --git a/changes/remaster.md b/changes/remaster.md
index a16cdea..eb79d3f 100644
--- a/changes/remaster.md
+++ b/changes/remaster.md
@@ -12,3 +12,9 @@
  * add Doc "Server Bedienung"
  * split functions
  * separate config into /etc/remaster/
+
+2018-05-13 - 2.0.1
+ * Update-Prüfmechanismus #15
+
+2018-05-13 - 2.0.2
+ * hotfix-2.0.2 ( create release folder if not exist )
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..9fded8b 100755
--- a/src/remaster.sh
+++ b/src/remaster.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
-#@version 2.0.0
+#@version 2.0.2
 #@autor 6543@obermui.de
-#@date 2018-05-12
+#@date 2018-05-13
 #@licence GNUv3
 
 #####################################################################################
@@ -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 ################################################
 #####################################################################################