Securing Linux Systems

Go to Course: https://www.coursera.org/learn/securing-linux-systems

Introduction

### Course Review: Securing Linux Systems #### Overview The "Securing Linux Systems" course available on Coursera is an essential offering for anyone looking to deepen their understanding of Linux security, whether for personal development or professional advancement. Aimed particularly at those preparing for the Linux Foundation Certified IT Associate (LFCA) exam, this course serves as the third part of a comprehensive series designed to navigate the crucial elements of working as an information technology professional. Participants will engage with fundamental concepts of ownership, authentication, and authorization, with practical insights into securing Linux environments through backups and more. With the rise of cyber threats targeting operating systems, this course has become increasingly relevant for both budding and experienced IT professionals alike. #### Syllabus Breakdown The curriculum is structured into four key modules, each focusing on a critical aspect of Linux security: 1. **Ownership and Permissions** - This module sets the stage by delving into file permissions and directory security within Linux systems. By understanding Access Control Lists (ACLs) and Context-Based security controls, students will gain insights into managing account types and privilege escalation. Mastery of these topics is vital for maintaining a secure Linux environment. 2. **Administer Access and Authentication** - Students will explore enhanced security measures through Linux Pluggable Authentication Modules (PAM), which allow sysadmins to configure user authentication methods. The module will also cover Public Key Infrastructure (PKI) and its integration with Secure Shell (SSH). Additionally, the introduction to open Virtual Private Networks (VPN) presents a robust framework for secure communications. 3. **Logging & Backups** - This section addresses the critical components of logging and backup strategies. Participants will learn about local and remote system logging and the importance of efficient backup and compression methods. A key takeaway is the exploration of various tools available in Linux for archiving and restoring data, essential for incident recovery. 4. **Linux Firewalls** - The final module emphasizes boundary security for both network and host systems through Linux Firewall technologies. Students will learn about configuring access control rules and forwarding packets, culminating in a discussion on intrusion detection systems. This knowledge is invaluable for anyone tasked with securing a network against unauthorized access. #### Course Recommendation The "Securing Linux Systems" course is highly recommended for those who aim to solidify their understanding of Linux security principles. Its well-structured curriculum allows for progressive learning, making complex topics accessible. The practical, hands-on approach ensures that students not only learn theoretical concepts but are also equipped with the skills necessary to implement security measures in real-world environments. Whether you're preparing for the LFCA exam or simply wish to enhance your cybersecurity expertise, this course is a valuable resource. In an age where cybersecurity is paramount, mastering the security functionalities of Linux systems is not just beneficial; it is essential. The lessons in this course will not only empower you as an IT professional but also bolster the overall security posture of the organizations you will be part of in the future. Enroll today and take a definitive step toward becoming a proficient Linux security practitioner!

Syllabus

Ownership and Permissions

In this module, we look at security and the Linux operating system. We will start by applying permissions to files and directories. We then look at Access Control Lists (ACL) and how they are applied in Linux. We will explore Context-Based security controls. Lastly, we will think about account types and privilege escalation.

In this module, we look at ways to increase our Linux Security. We start by looking at Linux Pluggable Authentication Modules (PAM). PAM is a suite of libraries that allows a Linux system administrator to configure methods to authenticate users. We then look at Public Key Infrastructure (PKI) and its use in Secure Shell (SSH). We conclude by utilizing open Virtual Private Networks (VPN).

In this module, we look at both local and remote system logging. We will also look at backup and compression of the files on the system to allow recovery in response to a system incident. We will conclude with a deep dive of the different tools available in Linux for archive and restore.

In this module, we look at the security at the boundaries of your network and your host Linux system. We look at different Linux Firewall technologies and the implementation of access control rules in the firewalls. We then think about forwarding packets when we want to allow traffic through the firewall to another host machine. We conclude by looking at intrusion detection systems in Linux.