Linux Server Hardening
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Lesson 10 of 13 · Control and detection

File integrity with AIDE

40 min Debian 12 Versions Debian 12, Ubuntu 24.04, Rocky 9

Objective

Know immediately whether an important file has changed: a system program replaced by a booby-trapped version, a configuration quietly modified, a SUID that appeared. Every day, AIDE compares the state of the disk with a reference snapshot.

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