Ansible Playbooks allow a repeatable, reusable, simple configuration management and multi-machine deployment system, that is well suited to deploying complex applications. It is also to execute a task with Ansible more than once, write a playbook, and put it under source control. We can also use the playbook to push out new configurations or authenticate the configuration of remote systems. The playbooks in the ansible-examples repository show several useful techniques.
For more explanation on this video: https://www.linuxhelp.com/how-to-write-your-first-ansible-playbook

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