PyconPH sprint - ansible error - no hosts matched or remaining

Hi,

I encountered an error when trying to install apache and running
another command afterwards. Details are below:

I'm using Ubuntu 12.04 LTS.

COMMAND:
ansible-playbook test.playbook -k -K

FILE test.playbook:

Review the error message, this is not an ansible problem, but mostly likely that you have gpgcheck on and something isn't signed properly.

following packages cannot be authenticated!\n apache2.2-common
apache2-mpm-worker apache2

--Michael