IT Security
Linux Networking and Security
This practical course helps professionals master Linux networking and security, firewalls, SSH, hardening, logging, access controls, and troubleshooting. The program connects key concepts, real use cases, risks, tools, and operational decisions so participants can apply the learning in their work environment. It can be tailored to the organization’s sector, internal systems, participant maturity, and performance objectives.
Objectives
- Understand the concepts, challenges, and use cases related to Linux networking and security, firewalls, SSH, hardening, logging, access controls, and troubleshooting.
- Identify the data, systems, processes, and stakeholders required for effective implementation.
- Assess risks, limitations, governance requirements, and practical control points.
- Use methods, tools, and templates to structure analysis and decision-making.
- Translate learning into action plans, recommendations, and measurable improvement opportunities.
- Adapt the approach to the operating context, team maturity, and business objectives.
Target audience
- Cybersecurity and IT security professionals
- SOC analysts, infrastructure teams, and operations teams
- Risk, audit, compliance, and governance professionals
- System, network, cloud, and OT administrators
- IT managers responsible for security posture
Program outline
A clear structure for the learning journey.
Program outline
Outline points are grouped in one designed block instead of being treated as separate module cards.
Module 1: Linux Installation, Filesystem Layout, and Boot Process
Foundation for Linux Installation, Filesystem Layout, and Boot Process: application, analysis, and review points linked to the module
Terminology and decisions in Linux Installation, Filesystem Layout, and Boot Process: application, analysis, and review points linked to the module
Inputs required for Linux Installation, Filesystem Layout, and Boot Process: application, analysis, and review points linked to the module
Typical mistakes around Linux Installation, Filesystem Layout, and Boot Process: applied exercise and practical decision from a realistic scenario
Module 2: Users, Groups, Permissions, sudo, and Access Control
Current-state mapping for Users, Groups, Permissions, sudo, and Access Control: application, analysis, and review points linked to the module
Examples and scenarios involving Users, Groups, Permissions, sudo, and Access Control: application, analysis, and review points linked to the module
Diagnostic questions about Users, Groups, Permissions, sudo, and Access Control: application, analysis, and review points linked to the module
Evidence produced through Users, Groups, Permissions, sudo, and Access Control: applied exercise and practical decision from a realistic scenario
Module 3: Packages, Repositories, Services, and systemd
Design considerations for Packages, Repositories, Services, and systemd: application, analysis, and review points linked to the module
Roles and responsibilities in Packages, Repositories, Services, and systemd: application, analysis, and review points linked to the module
Exceptions and constraints affecting Packages, Repositories, Services, and systemd: application, analysis, and review points linked to the module
Quality checks for Packages, Repositories, Services, and systemd: applied exercise and practical decision from a realistic scenario
Module 4: Storage, LVM, Filesystems, Mounts, and Backup Basics
Operating model for Storage, LVM, Filesystems, Mounts, and Backup Basics: application, analysis, and review points linked to the module
Tools and workflow steps in Storage, LVM, Filesystems, Mounts, and Backup Basics: application, analysis, and review points linked to the module
Handoffs and approvals around Storage, LVM, Filesystems, Mounts, and Backup Basics: application, analysis, and review points linked to the module
Escalation points in Storage, LVM, Filesystems, Mounts, and Backup Basics: applied exercise and practical decision from a realistic scenario
Module 5: Linux Networking, Firewalls, DNS, SSH, and Remote Access
Performance measures for Linux Networking, Firewalls, DNS, SSH, and Remote Access: application, analysis, and review points linked to the module
Review routines after Linux Networking, Firewalls, DNS, SSH, and Remote Access: application, analysis, and review points linked to the module
Improvement actions for Linux Networking, Firewalls, DNS, SSH, and Remote Access: application, analysis, and review points linked to the module
Sustaining discipline around Linux Networking, Firewalls, DNS, SSH, and Remote Access: applied exercise and practical decision from a realistic scenario
Module 6: Security Hardening, SELinux, Logs, and Audit Controls
Advanced scenarios in Security Hardening, SELinux, Logs, and Audit Controls: application, analysis, and review points linked to the module
Failure patterns seen in Security Hardening, SELinux, Logs, and Audit Controls: application, analysis, and review points linked to the module
Coordination challenges during Security Hardening, SELinux, Logs, and Audit Controls: application, analysis, and review points linked to the module
Recovery actions for Security Hardening, SELinux, Logs, and Audit Controls: applied exercise and practical decision from a realistic scenario
Module 7: Performance, Processes, Troubleshooting, and Recovery
Governance requirements for Performance, Processes, Troubleshooting, and Recovery: application, analysis, and review points linked to the module
Data quality checks in Performance, Processes, Troubleshooting, and Recovery: application, analysis, and review points linked to the module
Risk controls related to Performance, Processes, Troubleshooting, and Recovery: application, analysis, and review points linked to the module
Value measures for Performance, Processes, Troubleshooting, and Recovery: applied exercise and practical decision from a realistic scenario
Module 8: Linux Administration Lab
Implementation planning for Linux Administration Lab: application, analysis, and review points linked to the module
Readiness questions before Linux Administration Lab: application, analysis, and review points linked to the module
Pilot design for Linux Administration Lab: application, analysis, and review points linked to the module
Lessons learned after Linux Administration Lab: applied exercise and practical decision from a realistic scenario
Materials provided
- ○ Slides used during the sessions
- ○ Group activities and practical exercises
- ○ Worksheets, checklists, and templates
- ○ Case studies relevant to the course
- ○ 4D Certificate of Completion issued by 4D Training & Consultancy
- ○ Post-course support for technical queries and guidance
Training Options
Programs can be delivered in-house, online, or in a blended format depending on your team's schedule, location, and learning objectives. When an external certificate or exam is included, certification rules and fees remain under the relevant awarding body's policies, while 4D provides the training and preparation support.
Why choose 4D
4D Training & Consultancy designs technical and professional programs around the client’s operating reality. The course can be adapted to sector requirements, internal systems, team capability, practical use cases, and the level of depth required by the audience.
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