This lesson covers security administration tasks.

Objectives and Skills

Objectives and skills for the security administration tasks portion of Linux+ certification include:^[1]

• 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

Readings

Multimedia

Activities

Lesson Summary

Key Terms

References