diff --git a/util/au/au.sh b/util/au/au.sh
new file mode 100644
index 0000000..e8c9dd6
--- /dev/null
+++ b/util/au/au.sh
@@ -0,0 +1,30 @@
+:<<'info'
+shellnotes - au.sh
+(C) Dimitris Marakomihelakis
+Released under the "All rights reserved" category. See the RIGHTS.txt file
+in /docs/github/ for its full text.
+info
+
+case $1 in -au|--auto-update )
+	if grep -q 'ChUpd.sh' ~/.shellnotes/.shellnotes.sh; then
+		echo "auto-update feature is enabled."
+		echo -n "Disable it? [Y/N]: " && read input
+		case $input in Yes|y|Y|yes|YES )
+			sed -i '/ChUpd.sh/d' ~/.shellnotes/.shellnotes.sh
+			echo "auto-update feature is now disabled."
+			echo "To enable, run 'shellnotes -au' again."
+		esac
+	else
+		echo "auto-update feature is disabled."
+		echo -n "Enable it? [Y/N]: " && read input
+		case $input in Yes|y|Y|yes|YES )
+			long=$(grep -n "#The lines below must NOT be changed." ~/.shellnotes/.shellnotes.sh)
+			short=$(echo "${long}" | head -c1)
+			short=$((short+1))
+			file=$(eval echo "~/.shellnotes/util/ChUpd.sh")
+	      	sed -i "$short i\. $file" ~/.shellnotes/.shellnotes.sh
+	      	echo "auto-update feature is now enabled."
+			echo "To disable, run 'shellnotes -au' again."
+		esac	
+	fi
+esac