prefect@towel:~$ cat dnscheck.sh
#!/bin/bash
while :; do
echo `date +%d.%m:%H:%M` - 217.13.4.24 - `dig @217.13.4.24 ns prefect.no | grep time` >> public_html/www.thehun.no/dnscheck.raw
echo `date +%d.%m:%H:%M` - 217.13.4.140 - `dig @217.13.7.140 ns prefect.no | grep time` >> public_html/www.thehun.no/dnscheck.raw
echo `date +%d.%m:%H:%M` - 217.13.4.21 - `dig @217.13.4.21 ns prefect.no | grep time` >> public_html/www.thehun.no/dnscheck.raw
echo `date +%d.%m:%H:%M` - 217.13.4.136 - `dig @217.13.7.136 ns prefect.no | grep time` >> public_html/www.thehun.no/dnscheck.raw
i="0"
LINES=`wc -l public_html/www.thehun.no/dnscheck.raw | awk '{print $1}'`
rm public_html/www.thehun.no/dnscheck.log
while [ $LINES -gt 3 ]; do
head -n $LINES public_html/www.thehun.no/dnscheck.raw | tail -n 4 >> public_html/www.thehun.no/dnscheck.log
let LINES=LINES-4
echo $LINES
done
sleep 60
done