Linux Administration Cookbook

Querying a domain

To query a domain name on Linux, dig can be used:

$ dig bbc.co.uk; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7 <<>> bbc.co.uk;; global options: +cmd;; Got answer:;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6288;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1;; OPT PSEUDOSECTION:; EDNS: version: 0, flags:; udp: 65494;; QUESTION SECTION:;bbc.co.uk.            IN    A;; ANSWER SECTION:bbc.co.uk.        227    IN    A    151.101.0.81bbc.co.uk.        227    IN    A    151.101.64.81bbc.co.uk.        227    IN    A    151.101.128.81bbc.co.uk.        227    IN    A    151.101.192.81;; Query time: 24 msec;; SERVER: 10.0.2.3#53(10.0.2.3);; WHEN: Sun Aug 12 14:20:28 UTC 2018;; MSG SIZE  rcvd: 102

Here, we can see that the server being used for domain resolution (emboldened) is 10.0.2.3, which ...