The Ansible command can also be used to run arbitrary commands on remote servers. In the following example, we will run the df command only on all hosts matching 54.175.86.* for their public IP address (you will need to adapt this command to match your instance public IP as returned in the ping command from the previous example):

$ ansible --private-key ~/.ssh/EffectiveDevOpsAWS.pem '54.175.86.*' 
      -a 'df -h'
54.175.86.38 | success | rc=0 >>
Filesystem      Size  Used Avail Use% Mounted on
/dev/xvda1      7.8G  1.3G  6.5G  16% /

devtmpfs        490M   56K  490M   1% /dev
tmpfs           498M     0  498M   0% /dev/shm  

Now that we have a basic understanding of how Ansible works, we can start combining calls to different Ansible modules to put in place our automation. This is called creating a playbook.