Add Aliasing An Ansible Host as a devops til.

README.md

@@ -49,6 +49,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 
 ### devops
 
+- [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)
 - [Path Of The Packets](devops/path-of-the-packets.md)

devops/aliasing-an-ansible-host.md

@@ -0,0 +1,22 @@
+# Aliasing An Ansible Host
+
+When specifying the hosts that Ansible can interact with in the
+`/etc/ansible/hosts` file, you can put just the IP address of the host
+server, like so:
+
+```yml
+192.168.1.50
+```
+
+IP addresses are not particularly meaningful for a person to look at though.
+Giving it a name serves as better documentation and makes it easier to see
+what host servers are in play during a task.
+
+Ansible makes it easy to alias host servers. For example, we can name our
+host `staging` like so:
+
+```yml
+staging ansible_host=192.168.1.50
+```
+
+[source](http://docs.ansible.com/ansible/intro_inventory.html)