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 →