#!/bin/bash
## jesli mac adresow takich samych w sieci jest > $MACLIMIT to netcut
MACLIMIT=4
DIR="/tmp/netcut/"
DATA=`date +'%Y%m%d_%H%M'`
FILE1=$DIR"/"$DATA"-sort"

ip -4 n s|egrep -v "FAILED|INCOMPLETE"|sort > $FILE1
COUNT1=`cat $FILE1|wc -l`
COUNT2=`cat $FILE1|uniq|wc -l`

if [ `echo "$COUNT1-$COUNT2"|bc` -gt $MACLIMIT ] ; then
  cat $FILE1| mail -s "netcut list check it" your@mail.com
fi