echo "ZSK-KEY-TAG (secs to SOA RRSIG expiration) KSK-KEY-TAG (secs to DNSKEY RRSIG expiration)"
while [ "1" ]; do
 dt=`date -u +%Y%m%d%H%M%S`
 rs=`dig +short +dnssec -t soa $DOMAIN. @127.0.0.1 | grep ^SOA | cut -f5,7 -d' '`
 zk=`echo $rs | awk '{print $2}'`
 zke=`echo $rs | awk '{print $1}'`
 zke=`datediff $zke $dt`
 rs=`dig +short +dnssec -t dnskey $DOMAIN. @127.0.0.1 | grep ^DNSKEY | cut -f5,7 -d' '`
 kk=`echo $rs | awk '{print $2}'`
 kke=`echo $rs | awk '{print $1}'`
 kke=`datediff $kke $dt`
 echo "zsk: $zk ($zke) ksk: $kk ($kke)"
 sleep 9
done