So, we've made a good start to our journey into Linux security and hardening. In this chapter, we looked at why it's just as important to know about securing and hardening Linux systems as it is to know how to secure and harden Windows systems. We provided a few examples of how a poorly-configured Linux system can be compromised, and we mentioned that learning about Linux security could be good for your career. After that, we looked at how to set up a virtualized lab environment using VirtualBox and Cygwin.

In the next chapter, we'll look at locking down user accounts, and ensuring that the wrong people never get administrative privileges. I'll see you there.