Created
February 8, 2020 08:01
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Save kbence/0cc95109f5228bd919fef4c34247655e to your computer and use it in GitHub Desktop.
Script to check number of dig DNS results for a few free DNS servers out there.
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| #!/usr/bin/env bash | |
| DNS_SERVERS=" | |
| 8.8.8.8 8.8.4.4 | |
| 1.1.1.1 | |
| 208.67.222.222 208.67.220.220 | |
| 199.85.126.10 199.85.127.10 | |
| 8.26.56.26 8.20.247.20 | |
| 9.9.9.9 149.112.112.112 | |
| 64.6.64.6 64.6.65.6 | |
| " | |
| parallel echo BEGIN {} \; dig @{} "$1" \; echo END {} ::: $DNS_SERVERS | egrep -v '(^;|^$)' \ | |
| | IFS=$'\t' awk ' | |
| $1 == "BEGIN" {dns=$2; count[dns]=0} | |
| $1 != "BEGIN" && $1 != "END" {count[dns]++} | |
| $1 == "END" {printf "%-15s %2d\n", dns, count[dns]} | |
| ' |
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