How to do it...

1. Create a new file called playbook.yml inside the ch1_ansible folder and incorporate the following lines in this file:

$  cat playbook.yml

---
  - name: Initial Playbook
    hosts: all
    gather_facts: no
    tasks:
      - name: Display Hostname
        debug:
          msg: "Router name is {{ hostname }}"
      - name: Display OS
        debug:
          msg: "{{ hostname }} is running {{ os }}"

2. Run the playbook as shown here:

$ ansible-playbook -i hosts playbook.yml