Created
October 26, 2014 03:29
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| for i in $(seq 1 253); do x=$(arping -c 3 10.200.61.$i | awk '{ if ($0 ~ "^Unicast reply") { print $4" "$5 } }' | sort -u); [ "$x" ] && echo $x || echo 10.200.61.$i FREE; done > freeips.txt |
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Check arp for unused IPs.