Add Determine The IP Address Of A Domain as a devops til.

README.md

@@ -52,6 +52,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Aliasing An Ansible Host](devops/aliasing-an-ansible-host.md)
 - [Check The Status of All Services](devops/check-the-status-of-all-services.md)
 - [Check The Syntax Of nginx Files](devops/check-the-syntax-of-nginx-files.md)
+- [Determine The IP Address Of A Domain](devops/determine-the-ip-address-of-a-domain.md)
 - [Path Of The Packets](devops/path-of-the-packets.md)
 - [Push Non-master Branch To Heroku](devops/push-non-master-branch-to-heroku.md)
 - [Reload The nginx Configuration](devops/reload-the-nginx-configuration.md)

devops/determine-the-ip-address-of-a-domain.md

@@ -0,0 +1,31 @@
+# Determine The IP Address Of A Domain
+
+The `dig` (domain information grouper) command can be used to get more
+information about a domain name. To discover the IP address for a given
+domain, invoke `dig` with the domain as an argument.
+
+```bash
+$ dig joshbranchaud.com
+
+; <<>> DiG 9.8.3-P1 <<>> joshbranchaud.com
+;; global options: +cmd
+;; Got answer:
+;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26589
+;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
+
+;; QUESTION SECTION:
+;joshbranchaud.com.             IN      A
+
+;; ANSWER SECTION:
+joshbranchaud.com.      86400   IN      A       198.74.60.157
+
+;; Query time: 118 msec
+;; SERVER: 75.75.75.75#53(75.75.75.75)
+;; WHEN: Sun Jan 17 22:32:18 2016
+;; MSG SIZE  rcvd: 51
+```
+
+The *answer section* tells me that the IP address for `joshbranchaud.com` is
+`198.74.60.157`.
+
+See `man dig` for more details.