Here are 100 chapter titles for AppArmor, progressing from beginner to advanced, within the context of operating systems:
I. Foundations & Introduction (1-10)
- What is AppArmor? An Introduction to Application Security
 
- The Need for AppArmor: Protecting Your OS
 
- AppArmor vs. Other Security Mechanisms (SELinux, etc.)
 
- Understanding Profiles: The Core of AppArmor
 
- AppArmor's Role in the Linux Kernel
 
- Setting Up Your AppArmor Environment
 
- Basic AppArmor Commands: 
aa-status, aa-complain, aa-enforce 
- A Simple "Hello World" AppArmor Profile
 
- AppArmor Profile Syntax: A First Look
 
- Working with Abstractions: Simplifying Profile Management
 
II. Profile Writing Basics (11-25)
- File Access Rules: Controlling What Applications Can See
 
- Path Matching: Wildcards and Regular Expressions in Profiles
 
- Capability Restrictions: Limiting System Calls
 
- Network Access Control: Firewalling with AppArmor
 
- Domain Transitions: Changing Context for Subprocesses
 
- Include Files: Reusing Profile Components
 
- Profile Inheritance: Building on Existing Profiles
 
- Understanding the Different Modes: Enforce, Complain, and Disable
 
- Debugging AppArmor Profiles: Finding and Fixing Errors
 
- Using 
auditd with AppArmor: Deep Dive into Logs 
- Practical Example: Protecting a Web Server
 
- Practical Example: Sandboxing a Database Application
 
- Practical Example: Securing a Development Environment
 
- Best Practices for Writing AppArmor Profiles
 
- Common AppArmor Profile Mistakes and How to Avoid Them
 
III. Advanced Profile Writing (26-45)
- Advanced File Access Control: Fine-Grained Permissions
 
- Extended Attributes and AppArmor: Deeper Integration
 
- Process Capabilities: Controlling Privileged Operations
 
- Networking Deep Dive: Advanced Socket Controls
 
- Inter-Process Communication (IPC) with AppArmor
 
- Signals and AppArmor: Managing Process Interactions
 
- ptrace and AppArmor: Security Implications and Controls
 
- Namespaces and AppArmor: Isolation and Containment
 
- Containerization and AppArmor: Securing Docker and LXC
 
- Virtualization and AppArmor: Protecting Virtual Machines
 
- Dynamic Profile Generation: Adapting to Changing Environments
 
- Using Variables in AppArmor Profiles: Enhancing Flexibility
 
- Macros and Functions in AppArmor: Code Reusability
 
- AppArmor and Systemd: Integration and Management
 
- Writing Profiles for Daemons and Services
 
- Profiling Complex Applications: Strategies and Techniques
 
- Dealing with Setuid/Setgid Programs in AppArmor
 
- Security Considerations for Profile Design
 
- Performance Tuning of AppArmor Profiles
 
- Advanced Debugging Techniques: Using 
strace and other tools 
IV. AppArmor Internals & Integration (46-60)
- AppArmor Kernel Module: Architecture and Functionality
 
- AppArmor Subsystems: Understanding the Components
 
- Security Labels and Contexts in AppArmor
 
- AppArmor and the Linux Security Modules (LSM) Framework
 
- Deep Dive into the AppArmor Parser
 
- AppArmor's Interaction with the Filesystem
 
- AppArmor's Relationship with the Network Stack
 
- AppArmor and Memory Management
 
- Understanding AppArmor's Policy Language
 
- The AppArmor Development Cycle: From Idea to Implementation
 
- Contributing to AppArmor: Getting Involved in Development
 
- AppArmor and Other Security Tools: Complementary Approaches
 
- Integrating AppArmor with Security Auditing Systems
 
- AppArmor and Intrusion Detection/Prevention Systems (IDS/IPS)
 
- Building Custom AppArmor Tools and Utilities
 
V.  AppArmor in Specific Environments (61-80)
- AppArmor in Embedded Systems: Resource-Constrained Environments
 
- AppArmor in Mobile Devices: Android and other platforms
 
- AppArmor in Cloud Environments: Protecting Cloud Instances
 
- AppArmor in IoT Devices: Securing the Internet of Things
 
- AppArmor in Scientific Computing: Protecting Research Data
 
- AppArmor in Financial Systems: Ensuring Data Integrity
 
- AppArmor in Healthcare: HIPAA Compliance and Security
 
- AppArmor in Government and Defense: High-Security Environments
 
- AppArmor and Legacy Systems: Retrofitting Security
 
- AppArmor and Real-Time Systems: Performance Considerations
 
- AppArmor and Virtualized Environments: Nested Virtualization
 
- AppArmor and Container Orchestration (Kubernetes, etc.)
 
- AppArmor and Serverless Computing: Function Security
 
- AppArmor and CI/CD Pipelines: Integrating Security into Development
 
- AppArmor and DevOps Practices: Automating Security Management
 
- AppArmor and Security Hardening: Best Practices
 
- AppArmor and Vulnerability Management: Mitigating Exploits
 
- AppArmor and Incident Response: Containing Security Breaches
 
- AppArmor and Forensics: Investigating Security Incidents
 
- AppArmor and Compliance: Meeting Regulatory Requirements
 
VI. Advanced Topics and Future Directions (81-100)
- Advanced Profile Optimization: Minimizing Overhead
 
- Dynamic Profile Updates: Adapting to Runtime Changes
 
- AppArmor and Machine Learning: Anomaly Detection
 
- AppArmor and Blockchain: Securing Distributed Applications
 
- AppArmor and Confidential Computing: Protecting Data in Use
 
- AppArmor and Quantum Computing: Future Security Challenges
 
- Formal Verification of AppArmor Profiles: Ensuring Correctness
 
- Model Checking of AppArmor Policies: Automated Analysis
 
- AppArmor and Trusted Computing: Hardware-Based Security
 
- AppArmor and Homomorphic Encryption: Secure Computation
 
- The Future of AppArmor: Research and Development
 
- AppArmor and Emerging Technologies: Adapting to New Threats
 
- AppArmor Community and Resources: Getting Help and Support
 
- Case Studies: Real-World AppArmor Deployments
 
- AppArmor Security Audits: Best Practices and Tools
 
- AppArmor Training and Certification: Building Expertise
 
- AppArmor and Open Source: Collaboration and Contribution
 
- Comparing AppArmor to other LSMs (TOMOYO, Smack)
 
- AppArmor and the Principle of Least Privilege
 
- Building a Secure System with AppArmor: A Holistic Approach