In this chapter, you learned about the various options that Ansible provides so that you can look for problems in your Ansible code. More specifically, you learned how to use host facts to diagnose failures, how to include testing within a playbook, how to use check mode, how to solve host connection issues, how to pass variables from the CLI, how to limit the execution to a subset of hosts, how to flush the code cache, and how to check for bad syntax.
In the next chapter, you will learn how to get started with Ansible Tower.
