gistfile1.txt

File name: hostname.yml
location: /u02/ansible/ansible/playbooks

Content of the file:
- hosts: all
- tasks:
- command: hostname

Command:
[ansible@calaces_dev_server2 ansible]$ ansible-playbook playbooks/hostname.yml

Error:
[ansible@calaces_dev_server2 ansible]$ ansible-playbook playbooks/hostname.yml
ERROR! 'command' is not a valid attribute for a Play

The error appears to have been in '/u02/ansible/ansible/playbooks/hostname.yml': line 3, column 3, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

- tasks:
- command: hostname
  ^ here