Summary
This chapter looked at filesystem integrity and how it can help your system security by ensuring that files haven't been unexpectedly altered. The chapter began with a look at how checksums are used to check files. The chapter continued with an in-depth look at one filesystem integrity software package, AIDE. You saw how to install, configure, and use AIDE on your system.
The next chapter looks at system security from its lowest level for an operating system: the kernel.
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