Config

Default configuration file * /etc/ansible/ansible.cfg

Default Inventory file * Always look for local hosts file * /etc/ansible/hosts

Ansible has host key checking enabled by default. To disable hostkey chekcing, edit /etc/ansible/ansible.cfg or ~/.ansible.cfg

[defaults]
host_key_checking = False

Alternatively this can be set by the ANSIBLE_HOST_KEY_CHECKING environment variable:

$ export ANSIBLE_HOST_KEY_CHECKING=False