diff --git a/mirrorsync.sh b/mirrorsync.sh
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+#!/bin/bash
+#
+# mirrorsync - Synchronize a Rocky mirror
+# By: Dennis Koerner <koerner@netzwerge.de>
+# 
+# The latest version of this script can be found at:
+# https://github.com/rocky-linux/rocky-tools
+# 
+# Please read https://docs.rockylinux.org/en/rocky/8/guides/add_mirror_manager
+# for further information on setting up a Rocky mirror.
+#
+# Copyright (c) 2021 Rocky Enterprise Software Foundation
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+
+
+RSYNC="/usr/bin/rsync"
+# You can change v to q if you do not want detailed logging
+OPTS="-vrlptDSH --exclude=*.~tmp~ --delete-delay --delay-updates"
+
+# Please use a mirror next to you for initial sync
+# or if you are hosting a private rather than a pulic mirror.
+# Local mirrors might be faster.
+# Also we might restrict access to the master in the future.
+# A complete list of mirrors can be found at
+# https://mirrors.rockylinux.org/mirrormanager/mirrors/Rocky
+SRC="msync.rockylinux.org::rocky/mirror/pub/rocky/"
+
+# Your local path. Change to whatever fits your system.
+# MIRRORMODULE is also used in syslog output.
+MIRRORMODULE="rocky-linux"
+DST="/mnt/mirrorserver/${MIRRORMODULE}/"
+
+FILELISTFILE="/fullfiletimelist-rocky"
+LOCKFILE=$0.lockfile
+
+CHECKRESULT=`${RSYNC} --no-motd --dry-run --out-format='%n' ${SRC}${FILELISTFILE} ${DST}${FILELISTFILE}`
+if [ -z $CHECKRESULT ]; then
+	echo "${FILELISTFILE} unchanged. Not updating at " `date` >> $0.log 2>&1
+	logger -t rsync "Not updating ${MIRRORMODULE}: ${FILELISTFILE} unchanged."
+	exit 1
+fi
+
+
+if [ -e $LOCKFILE ]; then
+	echo "Update already in progress at" `date` >> $0.log 2>&1
+	logger -t rsync "Not updating ${MIRRORMODULE}: already in progress."
+else
+	touch $LOCKFILE
+	echo "Started update at" `date` >> $0.log 2>&1
+	logger -t rsync "Updating ${MIRRORMODULE}"
+		
+	${RSYNC} ${OPTS} ${SRC} ${DST} >> $0.log 2>&1
+	logger -t rsync "Finished updating ${MIRRORMODULE}"  
+	echo "End: "`date` >> $0.log 2>&1
+	rm $LOCKFILE
+fi