ansible all --list-hosts
 
ansible all -m ping

helloworld.yaml

- name: helloworld
  hosts: nodes
  tasks:
   - name: Ping my hosts
     ansible.builtin.ping:
   - name: Print message
     ansible.builtin.debug:
       msg: Hello world

ansible-playbook helloworld.yaml

python3 -m pip install --user ansible

/etc/ansible/hosts

[nodes]
10.45.0.1
10.45.0.2
10.45.0.3
10.45.0.4
10.45.0.5