The Linux Essentials Course

Lesson 1 • Setting Up a Linux Environment

Guides students through installation options including bare-metal, virtual machines, and WSL. Ensures every student has a working Linux environment before proceeding.

Lesson 2 • Linux Desktop and Basic Navigation

Introduces graphical desktop environments and basic GUI navigation. Bridges the gap between familiar desktop concepts and the Linux-specific interface.

Lesson 3 • Linux Distributions and Use Cases

Surveys major distribution families and their target environments. Students match distributions to professional scenarios such as servers, desktops, and containers.

Lesson 1 • Working with Files and Directories

Covers creating, copying, moving, renaming, and deleting files and directories. Students perform complete file management workflows from the command line.

Lesson 2 • Navigating the Filesystem

Teaches absolute and relative paths, directory traversal, and listing commands. Students move efficiently through any Linux directory tree without a GUI.

Lesson 3 • Viewing and Searching File Content

Introduces tools for reading, filtering, and searching text files. Students locate specific data within large files quickly and efficiently.

Lesson 4 • Understanding the Shell

Explains what a shell is, how it interprets commands, and the difference between shell types. Establishes the mental model needed for all subsequent command-line work.

Lesson 1 • Special Permissions and Access Control

Covers setuid, setgid, sticky bit, and POSIX ACLs for fine-grained access control. Students extend the basic permission model to handle complex multi-user scenarios.

Lesson 2 • File Ownership and Basic Permissions

Introduces user and group ownership and the read/write/execute permission bits. Students interpret ls -l output and understand who can access what.

Lesson 3 • Modifying Permissions with chmod

Teaches symbolic and octal chmod syntax for changing file permissions. Students apply correct permissions to files and directories in real scenarios.

Lesson 1 • System Information and Monitoring

Introduces commands for inspecting system state, hardware, and running processes. Students gather diagnostic data needed for basic system administration.

Lesson 2 • User Account Management

Teaches creating, modifying, and deleting user accounts using command-line tools. Students manage the full account lifecycle including password policies.

Lesson 3 • Privilege Escalation with sudo and su

Covers su for user switching and sudo for delegated privilege execution. Students configure sudoers safely and audit privileged command usage.

Lesson 1 • Functions and Script Best Practices

Covers function definition, argument handling, and script debugging techniques. Students write modular, maintainable scripts following professional conventions.

Lesson 2 • Control Flow in Shell Scripts

Teaches if/else, for, while, and case constructs for conditional and iterative logic. Students build scripts that respond dynamically to input and system state.

Lesson 3 • Pipes, Redirection, and Standard Streams

Explains stdin, stdout, stderr, and how to redirect and chain them. Students compose powerful one-liners by connecting commands through pipes.

Lesson 4 • Bash Scripting Basics

Introduces script structure, variables, and basic input/output in Bash. Students write and execute their first functional shell scripts.

Lesson 1 • DNF and RPM Package Manager

Covers dnf and rpm commands for Red Hat-based systems. Students install, query, and remove packages on Fedora, RHEL, and CentOS-compatible systems.

Lesson 2 • Snap, Flatpak, and AppImage

Introduces universal package formats that run across distributions. Students evaluate trade-offs between traditional and containerised package formats.

Lesson 3 • Compiling Software from Source

Walks through downloading, configuring, compiling, and installing source tarballs. Students install software unavailable in official repositories.

Lesson 4 • APT Package Manager

Covers apt and apt-get commands for Debian-based systems including search, install, and upgrade. Students manage a complete software lifecycle on Ubuntu and Debian.

Lesson 1 • SSH for Remote Access

Teaches SSH client usage, key-based authentication, and basic server hardening. Students connect securely to remote Linux systems and manage SSH keys.

Lesson 2 • Linux Networking Concepts

Reviews IP addressing, subnets, gateways, and DNS as they apply to Linux. Provides the conceptual foundation for all subsequent network configuration tasks.

Lesson 3 • Basic Firewall Configuration

Introduces ufw and firewalld for managing host-based firewall rules. Students allow, deny, and audit traffic to protect Linux services.

Lesson 4 • Network Diagnostics and Troubleshooting

Covers ping, traceroute, ss, netstat, and dig for diagnosing connectivity issues. Students systematically isolate and resolve network problems.

Lesson 1 • systemd Service Management

Teaches systemctl for starting, stopping, enabling, and inspecting services. Students manage the full service lifecycle on modern Linux systems.

Lesson 2 • Scheduling Tasks with cron and at

Covers crontab syntax and the at command for one-time and recurring task scheduling. Students automate maintenance jobs and timed script execution.

Lesson 3 • Understanding Linux Processes

Explains process creation, PID hierarchy, states, and priority. Students read process trees and understand how the kernel schedules work.

Lesson 4 • Monitoring and Controlling Processes

Covers top, htop, kill, and job control for managing running processes. Students terminate, pause, and resume processes from the command line.