The ansible command can also be used to run arbitrary commands on remote servers. In the following example, we will only run the df command on hosts matching 18.206.223.*  for their public IP address (you will need to adapt this command to match your instance public IP, as returned in the ping command in the previous example):

$ ansible --private-key ~/.ssh/EffectiveDevOpsAWS.pem '18.206.223.*' 
-a 'df -h'
18.206.223.199 | SUCCESS | rc=0 >>
Filesystem  Size  Used  Avail  Use%  Mounted on
devtmpfs    484M  56K   484M   1%    /dev
tmpfs       494M   0    494M   0%    /dev/shm
/dev/xvda1  7.8G   1.1G 6.6G   15%   /

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