Part II — Managing Systems

Chapter 4

Linux System Administration and Security

Domain 2 Lab 2

📖 Key Topics Covered

  • ▸ Linux System Administration
  • ▸ Linux Operating System Fundamentals
  • ▸ Popular Linux Distributions for Security
  • ▸ USE CASE
  • ▸ Ubuntu / Debian
  • ▸ CentOS / Rocky Linux /
  • ▸ Enterprise servers (RHEL‐based)
  • ▸ Kali Linux
  • ▸ Parrot OS
  • ▸ Arch Linux
  • ▸ Advanced users, customizable
  • ▸ The Linux File System Hierarchy
  • ▸ SECURITY RELEVANCE
  • ▸ System configuration files
  • ▸ User home directories

🔑 Key Terms

Everyone Owner SSH (Secure Shell) UFW (Uncomplicated Firewall)

See the full definitions in the Glossary and test yourself with Flashcards.

Assessment Tips

💡 Assessment Tip

Be able to read and set Linux file permissions using both numeric (chmod 755) and symbolic (chmod u+rwx,g+rx,o+rx) notation. Know that /etc/shadow (which stores password hashes) should have permissions of 640 or more restrictive, readable only by roo

🧪 Hands-On Lab

This chapter includes Lab 2 in Appendix E. View lab setup guide →