ansible-playbook test.yml -u root --check --diff --limit my-server.lan

$ cat test.yml 
- hosts: local
  tasks:
  - name: Ansible copy file to remote server
    copy:
      src: /home/agorbachev/git/agorbachev001/alex.txt
      dest: /tmp/alex.txt

# EXEC COMMAND
ansible all -s -u root -m shell -a 'ls -la'

ansible all -m command -a 'ls'

# APPLY PLAYBOOK WITHOUT INVENTORY
ansible-playbook -u root  --diff -i my-host.test.lan, add_user.yml

# ADD USER TO ALL HOSTS
ansible-playbook users/admins.yml --tags "alex"