-

Using /etc/ansible/ansible.cfg as config file
1 plays in foo.yml

PLAY ***************************************************************************

TASK [setup] *******************************************************************
ESTABLISH LOCAL CONNECTION FOR USER: mordred
localhost EXEC ( umask 22 && mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1452724722.48-121037191107407 )" && echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1452724722.48-121037191107407 )" )
localhost PUT /tmp/tmp7bxedT TO /home/mordred/.ansible/tmp/ansible-tmp-1452724722.48-121037191107407/setup
localhost EXEC LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 /usr/bin/python /home/mordred/.ansible/tmp/ansible-tmp-1452724722.48-121037191107407/setup; rm -rf "/home/mordred/.ansible/tmp/ansible-tmp-1452724722.48-121037191107407/" > /dev/null 2>&1
ok: [localhost]

TASK [test] ********************************************************************
task path: /home/mordred/foo.yml:4
ESTABLISH LOCAL CONNECTION FOR USER: mordred
localhost EXEC ( umask 22 && mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1452724723.6-77584448654829 )" && echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1452724723.6-77584448654829 )" )
localhost PUT /tmp/tmpiyAdyw TO /home/mordred/.ansible/tmp/ansible-tmp-1452724723.6-77584448654829/command
localhost EXEC LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 /usr/bin/python /home/mordred/.ansible/tmp/ansible-tmp-1452724723.6-77584448654829/command; rm -rf "/home/mordred/.ansible/tmp/ansible-tmp-1452724723.6-77584448654829/" > /dev/null 2>&1
changed: [localhost] => {"changed": true, "cmd": "echo Hello world", "delta": "0:00:00.004892", "end": "2016-01-13 17:38:43.647966", "invocation": {"module_args": {"_raw_params": "echo Hello world", "_uses_shell": true, "chdir": null, "creates": null, "executable": null, "removes": null, "warn": true}, "module_name": "command"}, "rc": 0, "start": "2016-01-13 17:38:43.643074", "stderr": "", "stdout": "Hello world", "stdout_lines": ["Hello world"], "warnings": []}

PLAY RECAP *********************************************************************
localhost                  : ok=2    changed=1    unreachable=0    failed=0   

foo.yml

---
- hosts: localhost
  tasks:
  - {name: test, shell: echo Hello world}

hosts

localhost ansible_connection=local