LinuxQuestions.org - [SOLVED] Speed test for a list of DNS addresses

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Speed test for a list of DNS addresses

Hi,

I'm writing a unix script, I need a way to test the response time of a group of IP addresses (they are DNS addresses).
I was thinking I could you

Code:

dig google.com @[DNS_1]

but I should use it in a loop and I should get the

Code:

Query time:

in the result string and I don't know how to do that.

It would be nice if the script was able to get the DNS list from a simple file where each row is a DNS address.

How can I do that? Do you have any other idea?

Thanks

Code:

#! /usr/bin/env bash



#Add/subtract DNS here.

list=(

208.67.222.222        #OpenDNS

208.67.220.220        #OpenDNS

8.8.8.8                #Google

8.8.4.4                #Google

209.244.0.3        #Level3

209.244.0.4                #Level3

68.94.156.1        #ATT

68.94.157.1                #ATT

4.2.2.1                #Verizon

4.2.2.2                #Verizon

4.2.2.3                        #Verizon

4.2.2.4                #Verizon

4.2.2.5                #Verizon

4.2.2.6                        #Verizon

75.75.76.76                #Comcast

84.200.69.80        #DNSwatch

84.200.70.40        #DNSwatch

209.88.198.133        #Greenteam

195.46.39.39        #SafeDNS

195.46.39.40        #SafeDNS

50.116.23.211        #OpenNIC

37.235.1.174        #FreeDNS

37.235.1.177        #FreeDNS

8.26.56.26                #Comodo

8.20.247.20                #Comodo

74.82.42.42                #Hurricane

89.233.43.71        #Censur

91.239.100.100        #Censur

)



for i in ${list[@]}; do

        echo $i

        dig @"$i" bing.com | grep Query

        sleep 1

        echo '' 

done > dnstest.txt