To test that Ansible is working correctly and that we can successfully connect and run commands remotely, let's use the Ansible ping command to check one of our hosts. Note that this is not like a network ping, Ansible ping confirms that it can communicate via SSH and execute commands remotely:

    $ ansible mon1 -m ping

The preceding command gives the following output:

Excellent, that worked, now let's run a simple command remotely to demonstrate the power of Ansible. The following command will retrieve the current running kernel version on the specified remote node:

    $ ansible mon1 -a 'uname -r'

This is the desired result: