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[root@linux dnslookup]# ./dnslookup @dns.google a.com
dnslookup dev
Server: dns.google
dnslookup result (elapsed 34.200068ms):
;; opcode: QUERY, status: NXDOMAIN, id: 16710
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;a.com. IN A
;; AUTHORITY SECTION:
com. 897 IN SOA a.gtld-servers.net. nstld.verisign-grs.com. 1719480446 1800 900 604800 86400