dig

Query DNS

dig @10.10.0.1 google.com

Get DNS zone status

dig +short SOA zone.address.com @dns.server.address

Reply is something like

ns.zone.address.com. contacts.zone.address.com. 12345678 10800 3600 604800 3600

where

• 12345678 - is incremental number that changes with each zone update

DNS lookup A record

dig +short A dns.google

Show my ip

dig -4 +short myip.opendns.com @resolver1.opendns.com

PTR rDNS record

dig +noall +answer -x 8.8.8.8

DNSSec get DS key from DNSKEY

(d=your.signed.domain; dig @127.0.0.1 +norecurse "$d". DNSKEY | dnssec-dsfromkey -f - "$d")