Domain Name System#
dig is a command line tool for querying the Domain Name System. There are alternatives like nslookup and host, but are being phased out and may give incorrect results.
$ dig mastering-linux.com soa
; <<>> DiG 9.16.27-RH <<>> mastering-linux.com soa
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27187
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;mastering-linux.com. IN SOA
;; ANSWER SECTION:
mastering-linux.com. 3600 IN SOA gabe.ns.cloudflare.com. dns.cloudflare.com. 2274772751 10000 2400 604800 3600
;; Query time: 34 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Sun Apr 17 16:28:48 CEST 2022
;; MSG SIZE rcvd: 107
$ dig mastering-linux.com ns
; <<>> DiG 9.16.27-RH <<>> mastering-linux.com ns
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55122
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;mastering-linux.com. IN NS
;; ANSWER SECTION:
mastering-linux.com. 86400 IN NS megan.ns.cloudflare.com.
mastering-linux.com. 86400 IN NS gabe.ns.cloudflare.com.
;; Query time: 32 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Sun Apr 17 16:29:23 CEST 2022
;; MSG SIZE rcvd: 101
dig mastering-linux.com a
$ dig mastering-linux.com
; <<>> DiG 9.16.27-RH <<>> mastering-linux.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13993
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;mastering-linux.com. IN A
;; ANSWER SECTION:
mastering-linux.com. 300 IN A 172.67.215.199
mastering-linux.com. 300 IN A 104.21.69.237
;; Query time: 44 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Sun Apr 17 16:30:27 CEST 2022
;; MSG SIZE rcvd: 80
$ dig mastering-linux.com a
$ dig mastering-linux.com aaaa
; <<>> DiG 9.16.27-RH <<>> mastering-linux.com aaaa
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29375
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;mastering-linux.com. IN AAAA
;; ANSWER SECTION:
mastering-linux.com. 300 IN AAAA 2606:4700:3030::6815:45ed
mastering-linux.com. 300 IN AAAA 2606:4700:3032::ac43:d7c7
;; Query time: 27 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Sun Apr 17 16:31:31 CEST 2022
;; MSG SIZE rcvd: 104
$ dig mastering-linux.com mx
; <<>> DiG 9.16.27-RH <<>> mastering-linux.com mx
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5323
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;mastering-linux.com. IN MX
;; ANSWER SECTION:
mastering-linux.com. 300 IN MX 55 isaac.mx.cloudflare.net.
mastering-linux.com. 300 IN MX 40 linda.mx.cloudflare.net.
mastering-linux.com. 300 IN MX 45 amir.mx.cloudflare.net.
;; Query time: 17 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Sun Apr 17 16:33:45 CEST 2022
;; MSG SIZE rcvd: 130
$ dig mastering-linux.com txt
; <<>> DiG 9.16.27-RH <<>> mastering-linux.com txt
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20220
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;mastering-linux.com. IN TXT
;; ANSWER SECTION:
mastering-linux.com. 300 IN TXT "google-site-verification=agka8dGjaI2llW-M_P6UgxjSteDeyW0whOvS1U0SprM"
mastering-linux.com. 300 IN TXT "v=spf1 include:_spf.mx.cloudflare.net ~all"
;; Query time: 26 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Sun Apr 17 16:32:17 CEST 2022
;; MSG SIZE rcvd: 184
$ dig mastering-linux.com any
; <<>> DiG 9.16.27-RH <<>> mastering-linux.com any
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40601
;; flags: qr rd ra; QUERY: 1, ANSWER: 15, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;mastering-linux.com. IN ANY
;; ANSWER SECTION:
mastering-linux.com. 36 IN A 104.21.69.237
mastering-linux.com. 146 IN TXT "google-site-verification=agka8dGjaI2llW-M_P6UgxjSteDeyW0whOvS1U0SprM"
mastering-linux.com. 234 IN MX 45 amir.mx.cloudflare.net.
mastering-linux.com. 3336 IN DNSKEY 257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==
mastering-linux.com. 146 IN TXT "v=spf1 include:_spf.mx.cloudflare.net ~all"
mastering-linux.com. 234 IN MX 55 isaac.mx.cloudflare.net.
mastering-linux.com. 36 IN A 172.67.215.199
mastering-linux.com. 86136 IN DS 2371 13 2 4777D07532CFC5B1E063C917FFCD4FAE816734AE78A8002A8EA4133C B2B8144C
mastering-linux.com. 3336 IN DNSKEY 256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==
mastering-linux.com. 234 IN MX 40 linda.mx.cloudflare.net.
mastering-linux.com. 86136 IN RRSIG MX 13 2 300 20220418153345 20220416133345 34505 mastering-linux.com. eugoWsioT6xGWO3xqQUAo92qUBj3ne5t9wsB78mk33X5U2obF8Cfv7Ku tIId9myY0W9HW80iBiHPkxMPeyPAKg==
mastering-linux.com. 86136 IN RRSIG TXT 13 2 300 20220418153217 20220416133217 34505 mastering-linux.com. O5Po+DiLqYGIW87bGo9KhmBmlrbI0VpT9E0LJnmw6du4SSsdOJvU9MX/ nqG9LbFcH8Hkkgv/u1FFZbj4EZDtlw==
mastering-linux.com. 86136 IN RRSIG A 13 2 300 20220418153027 20220416133027 34505 mastering-linux.com. /0ofambSsTTdMVinzLJ/splLR8IzYKkK3bYPqwC97K6iyMIWOpZ723xw AYcrJvUIjn27HccuRzNI36EZwCP4Hg==
mastering-linux.com. 86136 IN RRSIG DNSKEY 13 2 3600 20220521081442 20220321081442 2371 mastering-linux.com. u5h/0jU+crxew/ZHZ65+3Fmy+HWwi1TPxUwICDerVLRfL1pHwkgbRGTG YH9gPBiJ6RMpXt0fB577YNrWs3MYbg==
mastering-linux.com. 86136 IN RRSIG DS 8 2 86400 20220422052804 20220415041804 38535 com. CwDNOW3A8kGRbVjJEaM1wi1Gi0KUEpM5Cx+WciMPBS3b1lz4Ggs1wBe2 Poo/s4pIRzWB+FZ2/LlqgDMC6YhPnb7caag+4/YVP5aJijS1RHF1/IFG 4kr7vBDCqZ3Qo96G6+Wf3g8Vf+Ii/HlfWv9ImkHJ3Lc4AnB6y7oPQgFr 1Y1QTxF+d7NmVUPPFcDK0AH7ZisSVjHiSKcLIjHu9ExqMw==
;; Query time: 39 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Sun Apr 17 16:34:51 CEST 2022
;; MSG SIZE rcvd: 1161
$ dig www.mastering-linux.com cname
$ dig mastering-linux.com axfr @ns1.mastering-linux.com