diff --git a/README.md b/README.md
index e2e7b9c..a9dd1b7 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,8 @@
-# backup
+# Backup
+A flexible backup script for backing up linux system using rsync, ssh, cron and other common shell commands.
+
+## Inspiration
+[Backup mit RSYNC](https://wiki.ubuntuusers.de/Skripte/Backup_mit_RSYNC/)
+[rsync linux backup script](https://ctaas.de/rsync.htm)
+[Easy Automated Snapshot-Style Backups with Linux and Rsync](http://www.mikerubel.org/computers/rsync_snapshots/)
 
-A backup script for linux systems using rsync and ssh.
\ No newline at end of file
diff --git a/backup.sh b/backup.sh
new file mode 100755
index 0000000..213dc7b
--- /dev/null
+++ b/backup.sh
@@ -0,0 +1,106 @@
+#!/bin/bash
+# Simple backup with rsync
+# local-mode, tossh-mode, fromssh-mode
+
+SOURCES=(/root /etc /home /boot )
+TARGET="/home/sterzy/backup"
+
+# edit or comment with "#"
+#LISTPACKAGES=listdebianpackages        # local-mode and tossh-mode
+MONTHROTATE=monthrotate                # use DD instead of YYMMDD
+                                        
+RSYNCCONF=(--delete)
+#MOUNTPOINT="/media/daten"               # check local mountpoint
+MAILREC="hi@sterzy.com"
+
+SSHUSER="sterzy"
+#FROMSSH="fromssh-server"
+TOSSH="backup-pi"
+SSHPORT=22
+
+### do not edit ###
+
+MOUNT="/bin/mount"; FGREP="/bin/fgrep"; SSH="/usr/bin/ssh"
+LN="/bin/ln"; ECHO="/bin/echo"; DATE="/bin/date"; RM="/bin/rm"
+DPKG="/usr/bin/dpkg"; AWK="/usr/bin/awk"; MAIL="/usr/bin/mail"
+CUT="/usr/bin/cut"; TR="/usr/bin/tr"; RSYNC="/usr/bin/rsync"
+LAST="last"; INC="--link-dest=$TARGET/$LAST"
+
+LOG=$0.log
+$DATE > $LOG
+
+if [ "${TARGET:${#TARGET}-1:1}" != "/" ]; then
+  TARGET=$TARGET/
+fi
+
+if [ "$LISTPACKAGES" ] && [ -z "$FROMSSH" ]; then
+  $ECHO "$DPKG --get-selections | $AWK '!/deinstall|purge|hold/'|$CUT -f1 | $TR '\n' ' '" >> $LOG
+  $DPKG --get-selections | $AWK '!/deinstall|purge|hold/'|$CUT -f1 |$TR '\n' ' '  >> $LOG  2>&1 
+fi
+
+if [ "$MOUNTPOINT" ]; then
+  MOUNTED=$($MOUNT | $FGREP "$MOUNTPOINT");
+fi
+
+if [ -z "$MOUNTPOINT" ] || [ "$MOUNTED" ]; then
+  if [ -z "$MONTHROTATE" ]; then
+    TODAY=$($DATE +%y%m%d)
+  else
+    TODAY=$($DATE +%d)
+  fi
+
+  if [ "$SSHUSER" ] && [ "$SSHPORT" ]; then
+    S="$SSH -p $SSHPORT -l $SSHUSER";
+  fi
+
+  for SOURCE in "${SOURCES[@]}"
+    do
+      if [ "$S" ] && [ "$FROMSSH" ] && [ -z "$TOSSH" ]; then
+        $ECHO "$RSYNC -e \"$S\" -avR \"$FROMSSH:$SOURCE\" ${RSYNCCONF[@]} $TARGET$TODAY $INC"  >> $LOG 
+        $RSYNC -e "$S" -avR "$FROMSSH:\"$SOURCE\"" "${RSYNCCONF[@]}" "$TARGET"$TODAY $INC >> $LOG 2>&1 
+        if [ $? -ne 0 ]; then
+          ERROR=1
+        fi 
+      fi 
+      if [ "$S" ]  && [ "$TOSSH" ] && [ -z "$FROMSSH" ]; then
+        $ECHO "$RSYNC -e \"$S\" -avR \"$SOURCE\" ${RSYNCCONF[@]} \"$TOSSH:$TARGET$TODAY\" $INC " >> $LOG
+        $RSYNC -e "$S" -avR "$SOURCE" "${RSYNCCONF[@]}" "$TOSSH:\"$TARGET\"$TODAY" $INC >> $LOG 2>&1 
+        if [ $? -ne 0 ]; then
+          ERROR=1
+        fi 
+      fi
+      if [ -z "$S" ]; then
+        $ECHO "$RSYNC -avR \"$SOURCE\" ${RSYNCCONF[@]} $TARGET$TODAY $INC"  >> $LOG 
+        $RSYNC -avR "$SOURCE" "${RSYNCCONF[@]}" "$TARGET"$TODAY $INC  >> $LOG 2>&1 
+        if [ $? -ne 0 ]; then
+          ERROR=1
+        fi 
+      fi
+  done
+
+  if [ "$S" ] && [ "$TOSSH" ] && [ -z "$FROMSSH" ]; then
+    $ECHO "$SSH -p $SSHPORT -l $SSHUSER $TOSSH $LN -nsf $TARGET$TODAY $TARGET$LAST" >> $LOG  
+    $SSH -p $SSHPORT -l $SSHUSER $TOSSH "$LN -nsf \"$TARGET\"$TODAY \"$TARGET\"$LAST" >> $LOG 2>&1
+    if [ $? -ne 0 ]; then
+      ERROR=1
+    fi 
+  fi 
+  if ( [ "$S" ] && [ "$FROMSSH" ] && [ -z "$TOSSH" ] ) || ( [ -z "$S" ] );  then
+    $ECHO "$LN -nsf $TARGET$TODAY $TARGET$LAST" >> $LOG
+    $LN -nsf "$TARGET"$TODAY "$TARGET"$LAST  >> $LOG 2>&1 
+    if [ $? -ne 0 ]; then
+      ERROR=1
+    fi 
+  fi
+else
+  $ECHO "$MOUNTPOINT not mounted" >> $LOG
+  ERROR=1
+fi
+$DATE >> $LOG
+if [ -n "$MAILREC" ]; then
+  if [ $ERROR ];then
+    $MAIL -s "Error Backup $LOG" $MAILREC < $LOG
+  else
+    $MAIL -s "Backup $LOG" $MAILREC < $LOG
+  fi
+fi