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@jeongho
Created January 11, 2019 18:50
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digging dns with a zone transfer
dig axfr aa05.penguin.antarcticatec.com | grep -v ob | sort | sed -n -E "s/(.*)[0-9]{3,}.aa05.*$/\1/gp" | grep -E "(^ul|^dt)" |sort -u |grep -v CNAME
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