diff --git a/bin/hardening/8.1.1.9_set_space_left_audit.sh b/bin/hardening/8.1.1.9_set_space_left_audit.sh
new file mode 100755
index 0000000..ecc1f63
--- /dev/null
+++ b/bin/hardening/8.1.1.9_set_space_left_audit.sh
@@ -0,0 +1,92 @@
+#!/bin/bash
+
+#
+# harbian audit 9  Hardening
+#
+
+#
+# 8.1.1.9 Set space left for auditd service (Scored)
+# Authors : Samson wen, Samson <sccxboy@gmail.com>
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+HARDENING_LEVEL=4
+
+FILE='/etc/audit/auditd.conf'
+PATTERN='space_left'
+LOGFILESYSTEM='/var/log/audit/'
+
+# This function will be called if the script status is on enabled / audit mode
+audit () {
+        does_file_exist $FILE
+        if [ $FNRET != 0 ]; then
+            crit "$FILE does not exist"
+            FNRET=1
+        else
+            if [ -d $LOGFILESYSTEM ]; then
+                ok "$FILE exists, checking configuration"
+                DISKSIZE=$(df  -B 1m $LOGFILESYSTEM | grep -v "Filesystem" | awk '{printf $2}')
+                LEFTSIZE=$(bc <<<${DISKSIZE}*0.25 | awk '{print int($1)}')
+                if [ $(grep "^space_left.=.*"  $FILE | awk '{printf $3}' | wc -c) -eq 0 ]; then
+                    crit "$PATTERN is not configure in the $FILE."
+                    FNRET=3
+                else                
+                    SETSIZE=$(grep "^space_left.=.*"  $FILE | awk '{printf $3}')
+                    if [ "${SETSIZE}" -lt "${LEFTSIZE}" ]; then
+                        crit "Space left value: ${SETSIZE} is more than audit log filesystem 25%"
+                        FNRET=4
+                    else
+                        ok "Space left value: ${SETSIZE} is less than/equal to audit log filesystem 25%"
+                        FNRET=0
+                    fi
+                fi
+            else
+                crit "$LOGFILESYSTEM is not present"
+                FNRET=2
+            fi
+        fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply () {
+    if [ $FNRET = 0 ]; then
+        ok "$PATTERN is present in $FILE."
+    elif [ $FNRET = 1 -o $FNRET = 2 ]; then
+        warn "$FILE is not exist, please manual check."
+    elif [ $FNRET = 3 ]; then
+        warn "$PATTERN value not exist in $FILE, add it"
+        DISKSIZE=$(df  -B 1m $LOGFILESYSTEM | grep -v "Filesystem" | awk '{printf $2}')
+        LEFTSIZE=$(bc <<<${DISKSIZE}*0.25) | awk '{print int($1)}'
+        add_end_of_file $FILE "${PATTERN} = $LEFTSIZE"
+    elif [ $FNRET = 4 ]; then
+        warn "$PATTERN value is incorrect in $FILE, reset it"
+        DISKSIZE=$(df  -B 1m $LOGFILESYSTEM | grep -v "Filesystem" | awk '{printf $2}')
+        LEFTSIZE=$(bc <<<${DISKSIZE}*0.25) | awk '{print int($1)}'
+        replace_in_file $FILE "^${PATTERN}[[:space:]].*" "${PATTERN} = $LEFTSIZE"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+    . $CIS_ROOT_DIR/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi