Objective 110.1: Perform Security Administration Tasks
find can perform searches for file attributes such as SUID using the -perm option.
The chage command is used to maintain password aging on user accounts.
The nmap program can be used to port scan local or remote systems for open ports.
The sudo command is used to give elevated privileges to a defined set of users for a limited command set. The configuration file is /etc/sudoers.
The ulimit command is used to view and modify limits placed on users. The superuser maintains user limits in the file /etc/security/limits.conf.
Hard limits are limits that users cannot exceed, whereas soft limits are limits that users can exceed temporarily by calling the ulimit program.