working with hosts file

README.md

@@ -20,3 +20,26 @@ This series of lessons lays the foundation for the remainder of the course conte
 
 ##### Inventories
 ![img](https://github.com/Bes0n/EX407-Ansible-Automation/blob/master/images/img1.png)
+
+- Inventory files may simply consist of a list of hostnames but can be much more robust
+
+- It is also possible to define groups of hosts, host or group level variables, and groups of groups withing the inventory
+
+- There are a number of variables that may be used within the inventory to control how ansible connects to and interacts with target hosts
+
+Commands to call ansible with `ping` module:
+    - ```ansible innaghiyev1c.mylabserver.com -m ping -k``` - call ping module on `innaghiyev1c.mylabserver.com` host. Where `-m ping` is ping module
+    and `-k` is key for asking password
+    - ```ansible all -m ping -k``` - call all defined hosts in your inventory list `/etc/ansible/hosts/`
+    - ```ansible -i inv.ini httpd -m ping -k``` - where `-i` - inventory file place, `httpd` hosts group name inside of `inv.ini` file
+  
+Output:
+```
+innaghiyev1c.mylabserver.com | SUCCESS => {
+    "ansible_facts": {
+        "discovered_interpreter_python": "/usr/bin/python"
+    },
+    "changed": false,
+    "ping": "pong"
+}
+```