Linux System Administration

Course Description

CTS2321C – Linux System Administration is a 3-credit course on installing, configuring, securing, and maintaining Linux systems. The C suffix reflects a required laboratory — the course is conducted at a command line, and it cannot be learned any other way.

Linux runs most of the infrastructure students will encounter professionally: the majority of web servers, essentially all major cloud platforms, most container and Kubernetes workloads, network appliances, and embedded systems. Administration skill is directly employable, and unlike much of an IT curriculum it can be practiced entirely for free on a personal machine.

Content covers installation and distribution differences — commonly a Red Hat-family and a Debian-family distribution; the shell — navigation, file operations, redirection, pipes, and the toolset (grep, sed, awk, find); the filesystem hierarchy and mount management; file permissions and ownership — standard permissions, special bits, and access control lists; user and group administration; process management — signals, priorities, and monitoring; package management — apt, dnf/yum, and repositories; service management with systemd; storage — partitioning, filesystems, and logical volume management; networking — interface configuration, routing, DNS resolution, and troubleshooting; remote access with SSH and key-based authentication; shell scripting — variables, conditionals, loops, and automation; scheduling with cron and timers; logging and journalctl; backup and recovery; security hardening — firewalls, SELinux or AppArmor, and least privilege; and troubleshooting methodology.

Offered at approximately 11 Florida institutions with information technology programs.

Learning Outcomes

Required Outcomes

• Install and perform initial configuration of a Linux system.
• Describe major distribution families and their packaging and configuration differences.
• Navigate the filesystem and manage files from the command line.
• Use redirection, pipes, and text-processing utilities to manipulate data.
• Describe the Filesystem Hierarchy Standard and locate configuration and log files.
• Manage file permissions, ownership, special bits, and access control lists.
• Create and manage user accounts, groups, and password policy.
• Monitor and control processes including signals, priorities, and resource use.
• Install, update, and remove software using the distribution's package manager.
• Manage services and boot targets using systemd.
• Partition storage, create filesystems, and configure persistent mounts.
• Configure and manage logical volumes.
• Configure network interfaces, routing, and name resolution.
• Diagnose network connectivity problems systematically.
• Configure SSH including key-based authentication and secure defaults.
• Write shell scripts using variables, conditionals, loops, and functions.
• Schedule recurring tasks with cron or systemd timers.
• Review system logs to diagnose problems.
• Implement backup and restore procedures.
• Apply security hardening including host firewall and mandatory access control.
• Apply a systematic troubleshooting methodology to a failed system.

Optional Outcomes

• Configure common network services such as web, file, or DNS servers.
• Describe containerization and run containers.
• Use configuration management or automation tooling.
• Describe virtualization and hypervisor management.
• Describe cloud deployment of Linux instances.
• Prepare for Linux certification examinations.

Major Topics

Required Topics

• Linux history and distributions — kernel, GNU tooling, and distribution families.
• Installation — partitioning decisions, boot loader, and initial setup.
• The shell — bash, navigation, history, globbing, and quoting.
• Text processing — grep, sed, awk, cut, sort, and regular expressions.
• Filesystem hierarchy — standard directories and their purposes.
• Permissions — ugo/rwx, umask, setuid, setgid, sticky bit, and ACLs.
• Users and groups — account management, sudo, and privilege delegation.
• Processes — ps, top, signals, nice, and job control.
• Package management — apt and dnf/yum, repositories, and dependency resolution.
• systemd — units, services, targets, and journalctl.
• Storage — partitions, filesystems, fstab, and LVM.
• Networking — addressing, routing, DNS, and diagnostic tools.
• SSH — server configuration, key authentication, and secure practice.
• Shell scripting — syntax, control flow, arguments, and error handling.
• Task scheduling — cron, at, and systemd timers.
• Logging — log locations, rotation, and journal queries.
• Backup and recovery — strategies, tools, and restoration testing.
• Security — firewalld/ufw, SELinux or AppArmor, updates, and hardening.
• Troubleshooting — systematic diagnosis and boot recovery.

Optional Topics

• Network services (web, file, DNS).
• Containers and Docker.
• Ansible or configuration management.
• Virtualization and hypervisors.
• Cloud instances and infrastructure.
• Certification preparation.

Resources & Tools

• Linux Administration: A Beginner's Guide (Soyinka), McGraw Hill — a common adoption.
• UNIX and Linux System Administration Handbook (Nemeth et al.) — the professional reference; dense and worth owning beyond the course.
• How Linux Works (Ward), No Starch Press — unusually good on why the system behaves as it does.
• VirtualBox or VMware Workstation Player — free; run practice systems locally and snapshot before breaking them.
• Ubuntu Server, Rocky Linux, AlmaLinux, or Debian — all free; installing and reinstalling repeatedly is the single best practice method.
• The manual pages — man is authoritative, offline, and installed; learning to read it is a graded skill in effect.
• Linux Documentation Project, Arch Wiki, and distribution documentation — free and excellent, the Arch Wiki notably so even for non-Arch users.
• OverTheWire Bandit — a free, gamified set of shell exercises; genuinely effective for building command-line fluency.

Career Pathways

• Systems Administrator (SOC 15-1244) — the direct destination.
• Linux Administrator and Site Reliability Engineer.
• DevOps Engineer — Linux fluency is the assumed baseline.
• Cloud Engineer — AWS, Azure, and Google Cloud instances are overwhelmingly Linux.
• Network Administrator (SOC 15-1244) — network appliances run Linux.
• Information Security Analyst (SOC 15-1212) — security tooling is Linux-native.
• Database Administrator (SOC 15-1242) and Web Administrator.
• Technical Support Engineer — a common entry point.

Florida's technology employment is concentrated in Tampa, Orlando, Miami, and Jacksonville, with substantial demand from financial services, healthcare systems, defense and simulation contractors in Central Florida, and the growing Miami technology sector. Many of these roles are also remote-eligible, which broadens the market considerably beyond commuting distance.

Special Information

Build a home lab — it costs nothing and it is the whole point

The strongest advice attached to this course. Every tool needed is free: install VirtualBox, download Ubuntu Server and Rocky Linux, and build virtual machines. Take a snapshot, break the system deliberately, and recover it. Students who only use the campus lab during scheduled hours learn considerably less than those who keep a lab running at home, because administration is learned by repetition and by fixing things you broke yourself. Unlike most technical fields, there is no licensing or equipment barrier here whatsoever.

Certifications are what employers screen on

Coursework demonstrates learning; certifications get resumes past filters. The relevant ladder: CompTIA Linux+ is vendor-neutral and maps closely to a course like this one; Red Hat Certified System Administrator (RHCSA) is more respected and notably performance-based — candidates administer real systems under exam conditions rather than answering multiple-choice questions — which is why it carries weight; LPIC-1 is a further vendor-neutral option. Students should ask whether their program aligns to one and, if the goal is employment, plan to sit an examination near graduation. Several Florida colleges offer a College Credit Certificate in Linux or systems administration built around courses like this one, which is a fast route into the field.

Learn the command line properly rather than reaching for a GUI

Graphical tools exist, and on production servers they usually are not installed. Remote administration happens over SSH on a text terminal, automation requires scripting, and a candidate who can only administer through a desktop is not employable as an administrator. The discomfort of the first few weeks is the investment; students who push through it find the command line faster than a GUI for most tasks by the end of the term.

The manual pages are the actual documentation

Professionals read man pages. They are terse, complete, offline, and correct for the exact version installed — which a forum answer from 2016 is not. Learning to read a man page, find the relevant option, and interpret the synopsis notation is a skill that compounds, and it distinguishes people who can solve unfamiliar problems from people who can only repeat memorized commands.

Do dangerous things on a snapshot, not on something that matters

Linux will do exactly what it is told, including deleting the system. There is no undo and no recycle bin for rm. That is precisely why a virtual machine with snapshots is the right learning environment: a student should break things repeatedly and recover them, which is impossible to practice on a machine they need. The professional habit that follows — verify what you are about to run, especially as root, especially with a wildcard — is worth forming early.

Course numbering and title variation

The course appears as CTS2321 and CTS2321C, titled Linux System Administration at State College of Florida, St. Petersburg College, and Valencia, and Introduction to Linux at Tallahassee State — a title difference that signals a difference in depth. A second course, CTS2322 (Linux Administration 2), continues the sequence at Santa Fe and elsewhere. SCNS equivalency applies to the same number at the same level, never across numbers — verify what a receiving program or certificate requires.