system and environment information ansible gathers (“context”) before running Tasks
What runs tasks
are idempotent
A Handler is exactly the same as a Task (it can do anything a Task can), but it will run when called by another Task. You can think of it as part of an Event system; A Handler will take an action when called by an event it listens for.
Run a playbook
ansible-playbook [-i inventory.yml] playbook.yml
https://www.ansible.com/blog/ansible-best-practices-essentials https://docs.ansible.com/ansible/latest/user_guide/playbooks_best_practices.html#directory-layout