Retrieve information from the host and allow ansible to determine which host to execute the following task on.

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One way to retrieve information from the host and allow Ansible to determine which host to execute a task on is by using Ansible's built-in inventory.

Ansible allows users to define an inventory file that lists all the hosts that Ansible should manage. Within this inventory file, users can define groups of hosts based on shared characteristics such as location or role.

To retrieve information about a host, one can use Ansible's inventory hostname or IP address to execute a task on that specific host. For example:

- name: Retrieve host information
  debug:
    var: inventory_hostname

This task will run on the host specified in the inventory file and will print out its hostname.

Alternatively, Ansible also provides a dynamic inventory feature that allows users to retrieve host information from external sources such as Cloud providers or DHCP servers. This can be useful in scenarios where hosts are added or removed frequently.

In summary, to retrieve information from the host and allow Ansible to determine which host to execute a task on, users can leverage Ansible's inventory, groups, and dynamic inventory features.