Ansible

1. Getting Started

   Control node, managed nodes, ad hoc commands and first playbook.

2. Inventory

   Static and dynamic inventories, groups, host and group variables.

3. Playbooks

   Plays, tasks, modules and playbook structure.

4. Variables

   Variable types, precedence, facts and registered variables.

5. Conditionals and Loops

   when conditions, loops and flow control in tasks.

6. Handlers

   Notifying handlers and running them on change.

7. Templating with Jinja2

   Jinja2 expressions, filters and the template module.

8. Roles and Reuse

   Roles, includes and imports for reusable automation.

9. Error Handling

   Failure handling, blocks, rescue, ignore_errors and check mode.

10. Ansible Vault

    Encrypting secrets and variables.

11. Collections

    Using and distributing modules, roles and plugins as collections.

12. Strategies and Performance

    Execution strategies, forks, serial and speeding up playbooks.

13. Privilege Escalation

    become, sudo and running tasks as other users.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.

Source: endoflife.date