regenerate_hosts.sh

#!/bin/bash
BASE_MACS="6c:4b:90 a4:1f:72 78:45:c4 64:00:6a b0:83:fe d4:be:d9 00:23:24"
arg="c8:1f:66"
registry="/etc/registry/hosts"
cp $registry $registry.bak
for mac in $BASE_MACS
do
    arg="$arg\| $mac"
done
echo grep "$arg" /var/lib/dhcp/dhcpd.leases
MACS=""
for line in $(grep "$arg" /var/lib/dhcp/dhcpd.leases | sort -u)
do
    if [ "$line" != "hardware" ] && [ "$line" != "ethernet" ]
    then
        if [ -z "$(grep $line $registry)" ]
        then
            MACS="$MACS $(echo $line | sed 's/;$//g')"
        fi
    fi
done
for mac in $MACS
do
    echo "20191025 $mac inconnuAutoGen" >> $registry
done
systemctl restart registry wakeonlan