LPI Linux Certification in a Nutshell, 2nd Edition

Chapter 21. Security (Topic 1.114)

As with any multiuser-networked operating system, a secure environment is essential to system stability. This Topic covers basic Linux security administration. The following three Objectives are included:

Objective 1: Perform Security Administration Tasks

Candidates should know how to review system configuration to ensure host security in accordance with local security policies. This Objective includes how to configure TCP wrappers, find files with SUID/SGID bits set, verify packages, set or change user passwords and password aging information, and update binaries as recommended by CERT, BUGTRAQ, and/or the distribution's security alerts. Includes basic knowledge of ipchains and iptables. Weight: 4.

Objective 2: Set Up Host Security

Candidates should know how to set up a basic level of host security. Tasks include syslog configuration, shadowed passwords, setup of a mail alias for root's mail, and turning of all network services not in use. Weight: 3.

Objective 3: Set Up User-level Security

An LPIC candidate should be able to configure user-level security. Tasks include limits on user logins, processes, and memory usage. Weight: 1.

Objective 1: Perform Security Administration Tasks

A good security policy includes such things as securing inbound network requests, verifying the authenticity of software packages to assure they are not hostile, and managing local security resources. This Objective details some of the most common of these activities ...