Installing ansible

# Official PPA for Ubuntu
sudo apt-add-repository -y ppa:ansible/ansible
sudo apt-get update
sudo apt-get install -y ansible

Playbooks meant to only be run locally

   1 - hosts: local
   2   connection: local
   3   become: yes
   4   become_user: root
   5   tasks:
   6    - name: Install Nginx
   7      apt:
   8        name: nginx
   9        state: installed
  10        update_cache: true

or specify hosts: all: 

   1 - hosts: all
   2   become: yes
   3   become_user: root
   4   tasks:
   5    - name: Install Nginx
   6      apt:
   7        name: nginx
   8        state: installed
   9        update_cache: true

and then invoke ansible with: 

ansible-playbook -i 'localhost,' -c local Playbook.ansible.yml

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