diff --git a/adobe-flash.sh b/adobe-flash.sh
index ca59a37..6c39f4f 100755
--- a/adobe-flash.sh
+++ b/adobe-flash.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Adobe Flash Player"
-
+./apt-update.sh
 ./installed.sh flashplugin-nonfree $name && exit
 if sudo apt-get install flashplugin-nonfree -y
 then
diff --git a/adobe-reader.sh b/adobe-reader.sh
index dc26e87..efc496b 100755
--- a/adobe-reader.sh
+++ b/adobe-reader.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Adobe-Reader"
-
+./apt-update.sh
 ./installed.sh adobereader-deu $name && exit
 URL="ftp://ftp.adobe.com/pub/adobe/reader/unix/9.x/9.1/deu/AdbeRdr9.1.0-1_i386linux_deu.deb"
 wget -c $URL
diff --git a/anki.sh b/anki.sh
index 35ad798..c9e96ec 100755
--- a/anki.sh
+++ b/anki.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Anki"
-
+./apt-update.sh
 ./installed.sh anki $name && exit
 URL="http://ankisrs.net/download/mirror/anki-2.0.31.deb"
 wget -c $URL
diff --git a/apt-update.sh b/apt-update.sh
new file mode 100755
index 0000000..b67aba3
--- /dev/null
+++ b/apt-update.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+TEXTDOMAIN=la-tools
+TEXTDOMAINDIR=./
+
+#http://stackoverflow.com/a/12199798
+convertsecs() {
+ ((h=${1}/3600))
+ ((m=(${1}%3600)/60))
+ ((s=${1}%60))
+ printf "%02d:%02d:%02d\n" $h $m $s
+}
+
+last=$(stat -c %Y /var/cache/apt/)
+date=$(date +%s)
+diff=$(($date-$last))
+wort=$(convertsecs $diff)
+if [[ $diff > 43200 ]]
+then
+	echo $"package sources outdated"
+	echo $"$wort -- $diff seconds"
+	zenity --info --title $"package sources outdated" --text $"The last update was $wort ago. The package sources will get updated now"
+	sudo apt-get update -y
+fi
diff --git a/chromium.sh b/chromium.sh
index 9f5ffc0..43d8cc0 100755
--- a/chromium.sh
+++ b/chromium.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Chromium"
-
+./apt-update.sh
 ./installed.sh chromium $name && exit
 
 if sudo apt-get install chromium chromium-l10n
diff --git a/de_AT.utf8/LC_MESSAGES/la-tools.mo b/de_AT.utf8/LC_MESSAGES/la-tools.mo
index 224e298..f6dc3da 100644
Binary files a/de_AT.utf8/LC_MESSAGES/la-tools.mo and b/de_AT.utf8/LC_MESSAGES/la-tools.mo differ
diff --git a/de_AT.utf8/LC_MESSAGES/la-tools.po b/de_AT.utf8/LC_MESSAGES/la-tools.po
index 8fc817a..3a51cda 100644
--- a/de_AT.utf8/LC_MESSAGES/la-tools.po
+++ b/de_AT.utf8/LC_MESSAGES/la-tools.po
@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: la-tools\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2014-12-01 19:08+0100\n"
-"PO-Revision-Date: 2014-12-01 19:09+0100\n"
+"POT-Creation-Date: 2014-12-01 20:12+0100\n"
+"PO-Revision-Date: 2014-12-01 20:14+0100\n"
 "Last-Translator: Lukas Winkler <l.winkler23@gmx.at>\n"
 "Language-Team: \n"
 "Language: de\n"
@@ -24,13 +24,13 @@ msgstr ""
 #: adobe-flash.sh:9 adobe-reader.sh:12 anki.sh:12 chromium.sh:10
 #: dropbox_neu.sh:19 dropbox.sh:12 dropbox.sh:13 geogebra44.sh:11
 #: geogebra44.sh:29 geogebra5.sh:11 geogebra5.sh:29 google-chrome.sh:11
-#: google-earth.sh:18 lame.sh:10 msfonts.sh:9 opera.sh:11 skype.sh:11
+#: google-earth.sh:18 lame.sh:10 msfonts.sh:10 opera.sh:11 skype.sh:11
 msgid "Success"
 msgstr "Erfolg"
 
 #: adobe-flash.sh:9 adobe-reader.sh:12 anki.sh:12 chromium.sh:10
 #: dropbox_neu.sh:19 dropbox.sh:12 geogebra44.sh:29 geogebra5.sh:29
-#: google-chrome.sh:11 google-earth.sh:18 lame.sh:10 msfonts.sh:9 opera.sh:11
+#: google-chrome.sh:11 google-earth.sh:18 lame.sh:10 msfonts.sh:10 opera.sh:11
 #: skype.sh:11
 #, sh-format
 msgid "$name successfully installed"
@@ -39,18 +39,33 @@ msgstr "$name wurde erfolgreich installiert"
 #: adobe-flash.sh:11 adobe-reader.sh:15 anki.sh:15 chromium.sh:12
 #: dropbox_neu.sh:21 dropbox.sh:16 geogebra44.sh:13 geogebra44.sh:31
 #: geogebra5.sh:13 geogebra5.sh:31 google-chrome.sh:14 google-earth.sh:20
-#: lame.sh:12 msfonts.sh:11 opera.sh:13 skype.sh:13
+#: lame.sh:12 msfonts.sh:12 opera.sh:13 skype.sh:13
 msgid "Error"
 msgstr "Fehler "
 
 #: adobe-flash.sh:11 adobe-reader.sh:15 anki.sh:15 chromium.sh:12
 #: dropbox_neu.sh:21 dropbox.sh:16 geogebra44.sh:31 geogebra5.sh:31
-#: google-chrome.sh:14 google-earth.sh:20 lame.sh:12 msfonts.sh:11 opera.sh:13
+#: google-chrome.sh:14 google-earth.sh:20 lame.sh:12 msfonts.sh:12 opera.sh:13
 #: skype.sh:13
 #, sh-format
 msgid "An error occurred while installing $name"
 msgstr "Bei der Installation von $name ist ein Fehler aufgetreten"
 
+#: apt-update.sh:19 apt-update.sh:21
+msgid "package sources outdated"
+msgstr "Paketquellen veraltet"
+
+#: apt-update.sh:20
+#, sh-format
+msgid "$wort -- $diff seconds"
+msgstr "$wort -- $diff Sekunden"
+
+#: apt-update.sh:21
+#, sh-format
+msgid "The last update was $wort ago. The package sources will get updated now"
+msgstr ""
+"Das letzte Update war vor $wort. Die Paketquellen werden nun aktualisiert. "
+
 #: dropbox.sh:13
 msgid "Please restart Nautilus (file explorer)"
 msgstr "Bitte starte Nautilus neu (Dateiexplorer)"
diff --git a/dropbox.sh b/dropbox.sh
index 171c256..62ebf8a 100755
--- a/dropbox.sh
+++ b/dropbox.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Dropbox"
-
+./apt-update.sh
 ./installed.sh dropbox $name && exit
 
 URL="https://www.dropbox.com/download?dl=packages/debian/dropbox_1.6.2_i386.deb"
diff --git a/dropbox_neu.sh b/dropbox_neu.sh
index a6baf45..ba813a3 100755
--- a/dropbox_neu.sh
+++ b/dropbox_neu.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Dropbox"
-
+./apt-update.sh
 ./installed.sh dropbox $name && exit
 
 sources=$(cat /etc/apt/sources.list.d/dropbox.list)
diff --git a/geogebra44.sh b/geogebra44.sh
index 82a1e0d..6e6d2a8 100755
--- a/geogebra44.sh
+++ b/geogebra44.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Geogebra 4"
-
+./apt-update.sh
 sudo apt-get update
 if dpkg -l | grep geogebra44 | grep ii
 then
diff --git a/geogebra5.sh b/geogebra5.sh
index 2698a2f..3f5bda6 100755
--- a/geogebra5.sh
+++ b/geogebra5.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Geogebra 5"
-
+./apt-update.sh
 sudo apt-get update
 if dpkg -l | grep geogebra5 | grep ii
 then
diff --git a/google-chrome.sh b/google-chrome.sh
index eac3363..653e6ec 100755
--- a/google-chrome.sh
+++ b/google-chrome.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Google Chrome"
-
+./apt-update.sh
 ./installed.sh google-chrome $name && exit
 URL="https://dl.google.com/linux/direct/google-chrome-stable_current_i386.deb"
 wget -c $URL
diff --git a/google-earth.sh b/google-earth.sh
index 8c4624e..0b082dc 100755
--- a/google-earth.sh
+++ b/google-earth.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Google Earth"
-
+./apt-update.sh
 ./installed.sh google-chrome $name && exit
 sources=$(cat /etc/apt/sources.list.d/google-earth.list)
 if [ "$sources" != "deb http://dl.google.com/linux/earth/deb/ stable main" ]
diff --git a/la-tools.pot b/la-tools.pot
index 0f128bc..26ec999 100644
--- a/la-tools.pot
+++ b/la-tools.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2014-12-01 19:08+0100\n"
+"POT-Creation-Date: 2014-12-01 20:12+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -20,13 +20,13 @@ msgstr ""
 #: adobe-flash.sh:9 adobe-reader.sh:12 anki.sh:12 chromium.sh:10
 #: dropbox_neu.sh:19 dropbox.sh:12 dropbox.sh:13 geogebra44.sh:11
 #: geogebra44.sh:29 geogebra5.sh:11 geogebra5.sh:29 google-chrome.sh:11
-#: google-earth.sh:18 lame.sh:10 msfonts.sh:9 opera.sh:11 skype.sh:11
+#: google-earth.sh:18 lame.sh:10 msfonts.sh:10 opera.sh:11 skype.sh:11
 msgid "Success"
 msgstr ""
 
 #: adobe-flash.sh:9 adobe-reader.sh:12 anki.sh:12 chromium.sh:10
 #: dropbox_neu.sh:19 dropbox.sh:12 geogebra44.sh:29 geogebra5.sh:29
-#: google-chrome.sh:11 google-earth.sh:18 lame.sh:10 msfonts.sh:9 opera.sh:11
+#: google-chrome.sh:11 google-earth.sh:18 lame.sh:10 msfonts.sh:10 opera.sh:11
 #: skype.sh:11
 #, sh-format
 msgid "$name successfully installed"
@@ -35,18 +35,32 @@ msgstr ""
 #: adobe-flash.sh:11 adobe-reader.sh:15 anki.sh:15 chromium.sh:12
 #: dropbox_neu.sh:21 dropbox.sh:16 geogebra44.sh:13 geogebra44.sh:31
 #: geogebra5.sh:13 geogebra5.sh:31 google-chrome.sh:14 google-earth.sh:20
-#: lame.sh:12 msfonts.sh:11 opera.sh:13 skype.sh:13
+#: lame.sh:12 msfonts.sh:12 opera.sh:13 skype.sh:13
 msgid "Error"
 msgstr ""
 
 #: adobe-flash.sh:11 adobe-reader.sh:15 anki.sh:15 chromium.sh:12
 #: dropbox_neu.sh:21 dropbox.sh:16 geogebra44.sh:31 geogebra5.sh:31
-#: google-chrome.sh:14 google-earth.sh:20 lame.sh:12 msfonts.sh:11 opera.sh:13
+#: google-chrome.sh:14 google-earth.sh:20 lame.sh:12 msfonts.sh:12 opera.sh:13
 #: skype.sh:13
 #, sh-format
 msgid "An error occurred while installing $name"
 msgstr ""
 
+#: apt-update.sh:19 apt-update.sh:21
+msgid "package sources outdated"
+msgstr ""
+
+#: apt-update.sh:20
+#, sh-format
+msgid "$wort -- $diff seconds"
+msgstr ""
+
+#: apt-update.sh:21
+#, sh-format
+msgid "The last update was $wort ago. The package sources will get updated now"
+msgstr ""
+
 #: dropbox.sh:13
 msgid "Please restart Nautilus (file explorer)"
 msgstr ""
diff --git a/lame.sh b/lame.sh
index 4f449a9..56db376 100755
--- a/lame.sh
+++ b/lame.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Lame"
-
+./apt-update.sh
 ./installed.sh lame $name && exit
 
 if sudo apt-get install lame
diff --git a/msfonts.sh b/msfonts.sh
index 894d1e9..a3cf27d 100755
--- a/msfonts.sh
+++ b/msfonts.sh
@@ -2,6 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name=$"Windows fonts"
+./apt-update.sh
 ./installed.sh ttf-mscorefonts-installer $name && exit
 
 if sudo apt-get install ttf-mscorefonts-installer
diff --git a/opera.sh b/opera.sh
index 2fa9805..471099e 100755
--- a/opera.sh
+++ b/opera.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Opera"
-
+./apt-update.sh
 ./installed.sh opera $name && exit
 URL="http://get.geo.opera.com/pub/opera/linux/1216/opera_12.16.1860_i386.deb"
 wget -c $URL
diff --git a/skype.sh b/skype.sh
index 58cf1fc..8b548e7 100755
--- a/skype.sh
+++ b/skype.sh
@@ -2,7 +2,7 @@
 TEXTDOMAIN=la-tools
 TEXTDOMAINDIR=./
 name="Skype"
-
+./apt-update.sh
 ./installed.sh skype $name && exit
 URL="http://download.skype.com/linux/skype-debian_4.2.0.13-1_i386.deb"
 wget -c $URL