Summary
In this chapter, we saw that SELinux offers a more fine-grained access control mechanism on top of the Linux access controls. SELinux is implemented through Linux Security Modules and uses labels to identify its resources and processes based on ownership (user), role, type, and even the security sensitivity and categorization of the resource. We covered how SELinux policies are handled within a SELinux-enabled system and briefly touched upon how policy writers structure policies.
Linux distributions implement SELinux policies, which might be a bit different from each other based on supporting features, such as sensitivity labels, default behavior for unknown permissions, support for confinement levels, or specific constraints put in place ...
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