Chapter 21. Security

Obviously, in this day and age, security is a major concern among system administrators. We can take this a step further and say that security is a concern among all users. You need to consider many things when approaching security.

This chapter explains tactics and measures you can use to reduce security risks and concerns.


Surprisingly enough, some system administrators are rather lazy when it comes to security. A general "no problems here" attitude exists among some system administrators. I believe the problem boils down to one of two thoughts: Some system administrators think their system is secure enough, and some just do not know what the potential threats are. Many security features are disabled or not initially ...

Get Inside Linux now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.