Security Concepts

This section will focus on concepts that will enhance the security of your Desktop or Server.

Advanced Filesystem Attributes

As a Linux administrator, you may be called upon to set up a control system for file access. You probably already know how to set read, write, and execute permissions on files, and you will need to make extensive use of that knowledge. But, sometimes, you'll need more than just these permissions settings to get the job done. That's where filesystem attributes will come in handy. You can set different attributes on files in order to gain more control over how they are accessed.

The Case of the Missing Passwords

Not so very long ago, we heard about a certain Linux administrator who looked in the /etc/passwd file, saw that there were no passwords, and asked, "Can we just delete these entries where there are no passwords?".

Hmmmmm. . .

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