{"id":10800,"date":"2024-12-11T09:16:02","date_gmt":"2024-12-11T09:16:02","guid":{"rendered":"https:\/\/blog.webystrata.co.uk\/?p=10800"},"modified":"2024-12-11T09:16:02","modified_gmt":"2024-12-11T09:16:02","slug":"how-to-get-domain-information-in-linux","status":"publish","type":"post","link":"https:\/\/www.webystrata.co.uk\/blog\/how-to-get-domain-information-in-linux\/","title":{"rendered":"How to get Domain Information in Linux"},"content":{"rendered":"
\"How<\/a>
\u00a0<\/figcaption><\/figure>\n

How to get Domain Information in Linux<\/h1>\n

This guide is only going to show an overview of the commands. To find out more about each command you can run the following:<\/p>\n

\n
\n
\n
  man [<\/span>command]<\/span>\r\n<\/pre>\n<\/blockquote>\n<\/div>\n<\/div>\n
\n
dig<\/h2>\n
dig<\/span><\/code>\u00a0is used to query DNS servers. N.B.\u00a0dig<\/span><\/code>\u00a0will query the nameservers defined in the\u00a0\/etc\/resolv.conf<\/span><\/code>\u00a0file. If you are running a DNS server<\/a> on your own server, this command will query that DNS server<\/a> by default – this may not be what is being seen globally. See how to query an external nameserver further down.<\/p>\n
Here are some examples.<\/p>\n
\n
\n
[root@c7 ~]# <\/span>dig bbc.co.uk\r\n\r\n; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7_2.3 <<>> bbc.co.uk<\/span>\r\n;; global options: +cmd<\/span>\r\n;; Got answer:<\/span>\r\n;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49328<\/span>\r\n;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1<\/span>\r\n\r\n;; OPT PSEUDOSECTION:<\/span>\r\n; EDNS: version: 0, flags:; udp: 512<\/span>\r\n;; QUESTION SECTION:<\/span>\r\n;bbc.co.uk.                     IN      A<\/span>\r\n\r\n;; ANSWER SECTION:<\/span>\r\nbbc.co.uk.              120     IN      A       212.58.244.22<\/span>\r\nbbc.co.uk.              120     IN      A       212.58.244.23<\/span>\r\nbbc.co.uk.              120     IN      A       212.58.246.79<\/span>\r\nbbc.co.uk.              120     IN      A       212.58.246.78<\/span>\r\n\r\n;; Query time: 17 msec<\/span>\r\n;; SERVER: 8.8.8.8#53(8.8.8.8)<\/span>\r\n;; WHEN: Thu Aug 11 12:17:19 BST 2016<\/span>\r\n;; MSG SIZE  rcvd: 102<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n
This will give you the\u00a0A<\/span><\/code>\u00a0record entry for\u00a0bbc.co.uk<\/span><\/code>.<\/p>\n
\n
\n
[root@c7 ~]# <\/span>dig www.bbc.co.uk\r\n\r\n; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7_2.3 <<>> www.bbc.co.uk<\/span>\r\n;; global options: +cmd<\/span>\r\n;; Got answer:<\/span>\r\n;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4367<\/span>\r\n;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1<\/span>\r\n\r\n;; OPT PSEUDOSECTION:<\/span>\r\n; EDNS: version: 0, flags:; udp: 512<\/span>\r\n;; QUESTION SECTION:<\/span>\r\n;www.bbc.co.uk.                 IN      A<\/span>\r\n\r\n;; ANSWER SECTION:<\/span>\r\nwww.bbc.co.uk.          173     IN      CNAME   www.bbc.net.uk.<\/span>\r\nwww.bbc.net.uk.         105     IN      A       212.58.246.91<\/span>\r\nwww.bbc.net.uk.         105     IN      A       212.58.244.67<\/span>\r\n\r\n;; Query time: 9 msec<\/span>\r\n;; SERVER: 8.8.8.8#53(8.8.8.8)<\/span>\r\n;; WHEN: Thu Aug 11 12:36:48 BST 2016<\/span>\r\n;; MSG SIZE  rcvd: 100<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n
This will give you the\u00a0A<\/span><\/code>\u00a0record entry for\u00a0www.bbc.co.uk<\/span><\/code>. Most of the time the non-www<\/span><\/code>\u00a0and\u00a0www<\/span><\/code>\u00a0record will be the same but it is always worth checking.<\/p>\n
\n
\n
[root@c7 ~]# <\/span>dig mx bbc.co.uk\r\n\r\n; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7_2.3 <<>> mx bbc.co.uk<\/span>\r\n;; global options: +cmd<\/span>\r\n;; Got answer:<\/span>\r\n;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11699<\/span>\r\n;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1<\/span>\r\n\r\n;; OPT PSEUDOSECTION:<\/span>\r\n; EDNS: version: 0, flags:; udp: 512<\/span>\r\n;; QUESTION SECTION:<\/span>\r\n;bbc.co.uk.                     IN      MX<\/span>\r\n\r\n;; ANSWER SECTION:<\/span>\r\nbbc.co.uk.              233     IN      MX      20 cluster1a.eu.messagelabs.com.<\/span>\r\nbbc.co.uk.              233     IN      MX      10 cluster1.eu.messagelabs.com.<\/span>\r\n\r\n;; Query time: 22 msec<\/span>\r\n;; SERVER: 8.8.8.8#53(8.8.8.8)<\/span>\r\n;; WHEN: Thu Aug 11 12:39:13 BST 2016<\/span>\r\n;; MSG SIZE  rcvd: 107<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n
This will give you the\u00a0MX<\/span><\/code>\u00a0record for\u00a0bbc.co.uk<\/span><\/code>.<\/p>\n
\n
\n
[root@c7 ~]# <\/span>dig spf bbc.co.uk +short\r\n\"v=spf1 ip4:212.58.224.0\/19 ip4:132.185.0.0\/16 ip4:78.136.53.80\/28 ip4:78.136.14.192\/27 ip4:78.136.19.8\/29 ip4:89.234.10.72\/29 ip4:89.234.53.236 ip4:212.111.33.181 ip4:78.137.117.8 ip4:84.45.18.216 ip4:46.37.176.74 ip4:194.74.182.201\" \" ip4:80.169.167.201 +include:sf.sis.bbc.co.uk +include:servers.mcsv.net +include:amazonses.com ?all\"<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n
This example gives the\u00a0SPF<\/span><\/code>\u00a0record for\u00a0bbc.co.uk<\/span><\/code>\u00a0but also contains the\u00a0+short<\/span><\/code>\u00a0flag which will just output the actual record.<\/p>\n
\n
\n
[root@c7 ~]# <\/span>dig bbc.co.uk @8.8.8.8\r\n\r\n; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7_2.3 <<>> bbc.co.uk @8.8.8.8<\/span>\r\n;; global options: +cmd<\/span>\r\n;; Got answer:<\/span>\r\n;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62442<\/span>\r\n;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1<\/span>\r\n\r\n;; OPT PSEUDOSECTION:<\/span>\r\n; EDNS: version: 0, flags:; udp: 512<\/span>\r\n;; QUESTION SECTION:<\/span>\r\n;bbc.co.uk.                     IN      A<\/span>\r\n\r\n;; ANSWER SECTION:<\/span>\r\nbbc.co.uk.              191     IN      A       212.58.244.22<\/span>\r\nbbc.co.uk.              191     IN      A       212.58.244.23<\/span>\r\nbbc.co.uk.              191     IN      A       212.58.246.79<\/span>\r\nbbc.co.uk.              191     IN      A       212.58.246.78<\/span>\r\n\r\n;; Query time: 9 msec<\/span>\r\n;; SERVER: 8.8.8.8#53(8.8.8.8)<\/span>\r\n;; WHEN: Thu Aug 11 12:45:43 BST 2016<\/span>\r\n;; MSG SIZE  rcvd: 102<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n
This queries the\u00a0A<\/span><\/code>\u00a0record for\u00a0bbc.co.uk<\/span><\/code>\u00a0but specifically queries the nameserver\u00a08.8.8.8<\/span><\/code><\/p>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
How to get Domain Information in Linux This guide is only going to show an overview of the commands. To find out more about each command you can run the following: man [command] dig dig\u00a0is used to query DNS servers. N.B.\u00a0dig\u00a0will query the nameservers defined in the\u00a0\/etc\/resolv.conf\u00a0file. If you are running a DNS server on […]<\/p>\n","protected":false},"author":1,"featured_media":10802,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-10800","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/posts\/10800","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=10800"}],"version-history":[{"count":3,"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/posts\/10800\/revisions"}],"predecessor-version":[{"id":10804,"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/posts\/10800\/revisions\/10804"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/media\/10802"}],"wp:attachment":[{"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=10800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=10800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.webystrata.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=10800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}