Linux Administration/Security/Administrative Tasks

This lesson covers security administration tasks.

Objectives and Skills
Objectives and skills for the security administration tasks portion of Linux+ certification include:
 * Perform security administration tasks
 * Audit a system to find files with the suid/sgid bit set
 * Set or change user passwords and password aging information
 * Being able to use nmap and netstat to discover open ports on a system
 * Set up limits on user logins, processes and memory usage
 * Determine which users have logged in to the system or are currently logged in
 * Basic sudo configuration and usage
 * The following is a partial list of the used files, terms and utilities:
 * find
 * passwd
 * fuser
 * lsof
 * /nmap/
 * chage
 * netstat
 * sudo
 * /etc/sudoers
 * su
 * useradd, usermod
 * ulimit
 * who, w, last