Application security and Intrusion detection
Linux System Administration
Linux Security by Bob Toxen
- detailed explanations and excellent security tips;
Linux Security Cookbook
by Daniel Barrett, Richard Silverman and Robert Byrnes - great HOWTOs on security topics;
Computer Emergency Responce Team (CERT).
-- Current security advisories.
-- Recent articles related systems security.
How To Create an AppArmor Profile for Nginx on Ubuntu 14.04
-- annual hacker's magazine.
Exercise with AppArmor
Trojan script exercise
Gnu Privacy Guard
System Integrity Checks
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