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@ -10,7 +10,7 @@ filename: LearnAnsible.txt
```yaml
---
"{{ Why Ansible and Intro }}" in the second part of document
"{{ Why Ansible and detailed Intro }}" written in the second part of document
```
@ -60,19 +60,19 @@ Example of modules:
Example of execution - `ping`, `shell`
```bash
$ ansible -m ping
$ ansible -m ping all
$ ansible -m shell -a 'date; whoami' localhost #hostname_or_a_group_name
```
* Module: `command` - executes a single command that will not be processed through the shell, so variables like $HOME or operands like `|` `;` will not work
#JM
```bash
$ ansible -m command -a 'date; whoami' # FAILURE
$ ansible -m command -a 'date'
$ ansible -m command -a 'whoami'
$ ansible -m command -a 'echo $HOME'
$ ansible -m command -a 'date' all
$ ansible -m command -a 'whoami' all
```
* Module: `file` - performs file operations (stat, link, dir, ...)
@ -92,6 +92,11 @@ localhost
[some_group]
hostA.mydomain.com
hostB.localdomain
[a_group_of_a_groups:children]
some_group
some_other_group
```
* [Additional Reading.](http://docs.ansible.com/ansible/latest/intro_inventory.html)
@ -104,7 +109,7 @@ hostB.localdomain
### Playbook
Execution plan written in a form of script file(s) is called `playbook`.
**Execution plan** written in a form of script file(s) is called `playbook`.
Playbook consist of multiple elements
* a list (or group) of hosts that 'the play' is executed against
* `task(s)` or `role(s)` that are going to be executed
@ -116,7 +121,7 @@ You can think that playbook is very advanced CLI script that you are executing.
#### Example of the playbook:
This playbook would execute (on all hosts defined in the inventory) two tasks
*`ping` that would return message *pong*
* `ping` that would return message *pong*
* `shell` that execute three commands and return the output to our terminal
```yml