Monitor for New Wireless Wifi Devices with Aircrack-ng

#!/bin/sh
#for use with aircrack-ng logs

cat log-01.csv|grep ':'|cut -d\, -f1|sort -u >known

while [ 1 ];
do
  cat log-01.csv |\
  grep ':'|\
  cut -d\, -f1|\
  while read mac;
  do
    grep "$mac" known > /dev/null || (echo "New MAC $mac";echo "$mac" >> known )
  done
  sleep 1
done