OpenSUSE Linux OS Fundamentals

Lesson 1 • Installing openSUSE

Walks through the YaST installer workflow from boot to first login. Builds hands-on confidence with real installation decisions.

Lesson 2 • Linux and openSUSE Overview

Covers Linux kernel origins, the open-source model, and openSUSE's role in the ecosystem. Provides context for all subsequent technical content.

Lesson 3 • Planning Your Installation

Guides hardware assessment, edition selection, and pre-installation decisions. Ensures students make informed choices before touching a live system.

Lesson 1 • Getting Help from the Command Line

Demonstrates man pages, info documents, and built-in help flags. Equips students to self-resolve issues without external resources.

Lesson 2 • File and Directory Operations

Covers creating, copying, moving, and deleting files and directories. These operations underpin every administrative task in later chapters.

Lesson 3 • Shell Environment and Configuration

Explains environment variables, aliases, and shell startup files. Students customize their shell to improve productivity in daily work.

Lesson 4 • Text Processing and Redirection

Teaches standard I/O streams, pipes, and text-manipulation utilities. Enables students to filter and transform command output efficiently.

Lesson 1 • User Account Management

Covers creating, modifying, and deleting user accounts via command line and YaST. Directly supports multi-user system administration.

Lesson 2 • Special Permissions and ACLs

Introduces setuid, setgid, sticky bit, and POSIX ACLs for fine-grained control. Extends the standard permission model for complex environments.

Lesson 3 • Privilege Escalation with sudo

Configures sudo to delegate root privileges safely. Reduces reliance on the root account while maintaining administrative capability.

Lesson 4 • Group Management

Explains group creation, membership assignment, and the role of primary vs. supplementary groups. Enables role-based access control on shared systems.

Lesson 1 • Understanding RPM Packages

Explains RPM package format, metadata, and dependency concepts. Provides the foundation for understanding how zypper resolves software requirements.

Lesson 2 • YaST Software Management

Uses the YaST graphical and ncurses software manager for package tasks. Offers an alternative workflow for administrators who prefer a menu-driven interface.

Lesson 3 • System Updates and Patches

Explains the difference between updates and patches and how to apply them safely. Keeps systems current and secure in production environments.

Lesson 4 • Managing Repositories

Covers adding, removing, enabling, and prioritizing software repositories. Repository management directly affects system stability and update behavior.

Lesson 1 • Logical Volume Management

Introduces LVM concepts: physical volumes, volume groups, and logical volumes. Enables flexible, resizable storage allocation on production systems.

Lesson 2 • Disk Partitioning Concepts

Covers MBR vs. GPT partition tables and partition types. Establishes the conceptual model needed before creating or modifying disk layouts.

Lesson 3 • Disk Monitoring and Maintenance

Covers tools for checking disk health, usage, and filesystem integrity. Proactive monitoring prevents data loss and unplanned downtime.

Lesson 4 • Mounting and the fstab File

Explains manual mounting and persistent mount configuration via /etc/fstab. Ensures storage is accessible and correctly configured across reboots.

Lesson 1 • Managing Services with systemctl

Demonstrates starting, stopping, enabling, and masking services. These are the most frequent administrative actions on any running system.

Lesson 2 • Boot Process and Troubleshooting

Traces the boot sequence from firmware to login prompt. Students diagnose and recover from boot failures using GRUB and systemd tools.

Lesson 3 • systemd Architecture and Units

Explains systemd unit types, targets, and the dependency graph. Provides the conceptual model for all service management tasks in this chapter.

Lesson 4 • Process Monitoring and Control

Covers tools for viewing, prioritizing, and terminating processes. Students maintain system responsiveness by managing resource-intensive processes.

Lesson 1 • Network Concepts Review

Refreshes IP addressing, subnetting, and the TCP/IP stack. Ensures all students share the conceptual baseline needed for hands-on configuration.

Lesson 2 • Network Diagnostics and Troubleshooting

Applies diagnostic tools to isolate connectivity failures at each network layer. Builds systematic troubleshooting habits for real-world incidents.

Lesson 3 • Configuring Network Interfaces

Covers static and dynamic interface configuration using NetworkManager and wicked. Students bring interfaces up, assign addresses, and persist settings.

Lesson 4 • Routing and Name Resolution

Explains default gateway configuration, static routes, and DNS resolver setup. Correct routing and resolution are prerequisites for all network services.

Lesson 1 • Security Principles and Threat Model

Introduces least privilege, defense in depth, and attack surface concepts. Frames all subsequent hardening tasks within a coherent security strategy.

Lesson 2 • AppArmor Mandatory Access Control

Covers AppArmor profiles, modes, and enforcement for confining applications. Limits damage from compromised processes beyond what standard permissions provide.

Lesson 3 • Audit Logging and Intrusion Detection

Configures auditd rules to record security-relevant events and reviews logs. Provides evidence for incident response and compliance requirements.

Lesson 4 • SSH Hardening and Key Authentication

Secures the SSH daemon by disabling weak options and enforcing key-based login. SSH is the primary remote access vector and must be hardened first.