[Gllug] Help with Script.

[Martin N Stevens]

Hi,

I am trying to write a script that will collect all the mac addresses
on my network, it will be run periodically to update a file called
mac.txt

However the matching part doesn't seem to be working. Any clues please.

================================

#!/bin/bash

nmap 10.72.92.0/22 -sP | grep MAC | cut -d " " -f3 > live.txt

cat live.txt | while read line; do
        grep $(line) mac.txt > /dev/null 2>&1
        if [ $? -eq 1 ]; then
                echo "Mac not known $(line). Adding to mac.txt file"
                echo $(line) >> mac.txt
        fi
done

rm live.txt

================================

Regards

Martin Stevens

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