Install Ansible on Mac OS X:
sudo easy_install pip sudo pip install ansible
Install Ansible on CentOS/Fedora:
sudo yum install ansible
The EPEL-Release repository may need to be added on certain versions of CentOS, RHEL, and Scientific Linux.
Install Ansible on Ubuntu:
sudo apt-get install software-properties-common sudo apt-add-repository ppa:ansible/ansible sudo apt-get update sudo apt-get install ansible