DNS Tester Tool it is a bash script which can test speed response for IP addresses from list and collect speed statistics.

DNS Tester Tool executes dig command for IP addresses from default.txt and collect and show speed response statistics in several columns:

It is a text file with DNS resolvers IP addresses list. You can change this file and will add or remove any own DNS resolvers IP addresses, as default:

1.1.1.1
8.8.8.8
9.9.9.9

You can create multiple DNS list files, as example in the list in script location catalog and then use as argument:

./test.sh lists/my.txt

You can set custom iterations for testing (default: 3):

./test.sh lists/my.txt 2

test.sh has -r parameter - you can use custom resolver IP address for your tests (default: 1.1.1.1):

./test.sh lists/my.txt 2 -r 9.9.9.9

As default script uses lab.sys-adm.in domain name, you can use everyone if you need with -d parameter:

./test.sh default.txt 2 -d google.com -r 8.8.8.8