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Linux / Unix: Dig Command Find Out TTL (Time to Live) Value For DNS Records

I would like to see the Time-to-live (TTL) value for a 'AAAA' and A record for domains. How do I see Time-to-live (TTL) for a DNS record under Unix or Linux operating systems using command line options?
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Find the DNS Authority Record for a DNS Domain (SOA)

Q.How do I find out the DNS authority record (SOA) for any DNS domain under UNIX / Linux shell?
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