Dig
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dig (domain information groper) is a network administration command-line tool for querying Domain Name System (DNS) name servers.
Example usage[edit | edit source]
Retrieve the A record[edit | edit source]
In this example, dig is used to query for A type of record information in the domain example.com:
Command line:
dig example.com a
Output:
; <<>> DiG 9.6.1 <<>> example.com any ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4016 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;example.com. IN A ;; ANSWER SECTION: <b>example.com. 172719 IN A 208.77.188.166</b> ;; Query time: 1 msec ;; SERVER: ::1#53(::1) ;; WHEN: Wed Aug 12 11:40:43 2009 ;; MSG SIZE rcvd: 154
Queries may be directed to designated DNS servers for specific records; in this example, MX records:
Command:
dig wikimedia.org MX @ns0.wikimedia.org
Output:
; <<>> DiG 9.6.1 <<>> wikimedia.org MX @ns0.wikimedia.org ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61144 ;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 2 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;wikimedia.org. IN MX ;; ANSWER SECTION: wikimedia.org. 3600 IN MX 10 mchenry.wikimedia.org. wikimedia.org. 3600 IN MX 50 lists.wikimedia.org. ;; ADDITIONAL SECTION: mchenry.wikimedia.org. 3600 IN A 208.80.152.186 lists.wikimedia.org. 3600 IN A 91.198.174.5 ;; Query time: 73 msec ;; SERVER: 208.80.152.130#53(208.80.152.130) ;; WHEN: Wed Aug 12 11:51:03 2009 ;; MSG SIZE rcvd: 109