Kiireim dns server

Internetist leitud skript, mille alusel on hea otsustada, mis DNS server on kõige kiirem alternatiiv ISP omale.

#!/bin/sh
isp=$(dig +noall +stats 2>&1 | awk '$2~/^SERVER:$/{split($3,dnsip,"#");print dnsip[1]}');
m="-------------------------------------------------------------------------------";
s="                                                                               ";
h="+${m:0:25}+${m:0:12}+${m:0:12}+${m:0:12}+${m:0:12}+${m:0:12}+";
header=("Domain${s:0:23}" "Your ISP${s:0:10}" "Google${s:0:10}" "4.2.2.2${s:0:10}" "OpenDNS${s:0:10}" "DNS Adv.${s:0:10}");
echo "${h}";
echo "| ${header[0]:0:23} | ${header[1]:0:10} | ${header[2]:0:10} | ${header[3]:0:10} | ${header[4]:0:10} | ${header[5]:0:10} |";
echo "${h}";
for i in "lifehacker.com" "facebook.com" "manu-j.com"  "reddit.com" "tb4.fr" "bbc.co.uk" "neti.ee";
do
  ii="${i}${s:23}";
  echo -ne "| ${ii:0:23} |";
  for j in "${isp}"  "8.8.8.8"  "4.2.2.2" "208.67.222.222" "156.154.70.1";
  do
    r="${s:10}$(dig +noall +stats +time=9 @${j} ${i} 2>&1 | awk '$2~/^Query$/{print $4" "$5}')";
    echo -ne " ${r:${#r}-10} |";
  done
  echo -ne "\n${h}\n";
done
 
#EOF