IN THIS CHAPTER
Implementing basic security
Auditing and reviewing security
Understanding security is a crucial part of Linux system administration. No longer are a username and simple password sufficient for protecting your server. The number and variety of computer attacks escalate every day, and the need to improve computer security continues to grow with them.
Your first step is to gather knowledge of basic security procedures and principles. With this information, you can begin the process of locking down and securing your Linux servers. Also, you can learn how to stay informed of daily new threats and the new ways to continue protecting your organization's valuable information assets.
Securing your Linux systems must be done in several layers. It begins by physically securing the computers Linux runs on and proceeds through using good basic techniques for properly defining and securing user accounts. These and other techniques are the first lines of defense in securing your Linux systems.
A lock on the computer server room door is a first line of defense. Although a very simple concept, it is often ignored. Access to the physical server means access to all the data it contains. No security software can fully protect your systems if someone with malicious intent ...