Linux security courses can help you learn system hardening, user access controls, network security protocols, and incident response strategies. You can build skills in configuring firewalls, implementing encryption techniques, and conducting security audits. Many courses introduce tools like iptables for firewall management, OpenSSL for encryption, and Wireshark for network analysis, showing how these skills are applied in practical work to protect systems from vulnerabilities and threats.

Codio
Skills you'll gain: User Accounts, Unix Commands, Unix, Unix Shell, Command-Line Interface, User Provisioning, OS Process Management, File Systems, Linux, Ubuntu, Linux Commands, Operating Systems, Systems Administration, Operating System Administration, Authorization (Computing), Shell Script, File Management, Data Storage
★ 4.4 (89) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Prompt Engineering, Responsible AI, ChatGPT, Prompt Engineering Tools, AI literacy, Data Ethics, Generative AI, Digital pedagogy, AI Integrations, LLM Application, Educational Materials, AI Personalization, Canva (Software), Instructional Design, Communication, Data Security
★ 4.9 (564) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Behavior-Driven Development, DevSecOps, Test Driven Development (TDD), Kanban Principles, Continuous Integration, Agile Software Development, Lean Methodologies, DevOps, Agile Methodology, Scrum (Software Development), Software Development Methodologies, Lean Manufacturing, Development Testing, Continuous Deployment, Unit Testing, Continuous Delivery, Application Security, CI/CD, Integration Testing, Software Development
★ 4.6 (557) · Beginner · Course · 1 - 4 Weeks

Peking University
Skills you'll gain: Microarchitecture, Computer Architecture, Computer Systems, Hardware Architecture, Peripheral Devices, Computer Hardware, Computer Engineering, Data Storage Technologies, Data Storage, System Software, Systems Architecture, Computational Logic, Memory Management
★ 4.8 (483) · Mixed · Course · 1 - 3 Months

Fractal Analytics
Skills you'll gain: Model Context Protocol, AI Security, AI Integrations, Threat Modeling, Context Engineering, Enterprise Architecture, Generative AI Agents, Security Engineering, Context Management, Interoperability, Agentic systems, Generative AI
★ 4.5 (55) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: MITRE ATT&CK Framework, Vulnerability Assessments, Open Web Application Security Project (OWASP), Distributed Denial-Of-Service (DDoS) Attacks, Vulnerability Scanning, Vulnerability Management, Threat Modeling, Cybersecurity, Malware Protection, Mobile Security, Cyber Threat Intelligence, Penetration Testing, Exploitation techniques, Brute-force attacks, Network Security, Cryptography, Threat Management, Information Systems Security, Threat Detection, Cloud Security
★ 4.8 (31) · Beginner · Specialization · 3 - 6 Months

University of Minnesota
Skills you'll gain: Business Systems Analysis, Systems Analysis, Requirements Analysis, Business Requirements, Business Analysis, Business Systems, Business Analysis Tools, Process Flow Diagrams, User Requirements Documents, Data Modeling, Data Flow Diagrams (DFDs), Business Process Modeling, Diagram Design, Process Modeling, Feasibility Studies, Decision Making
★ 4.8 (580) · Beginner · Course · 1 - 3 Months

ISC2
Skills you'll gain: Authentications, Authorization (Computing), Role-Based Access Control (RBAC), Identity and Access Management, Security Controls, User Provisioning, Zero Trust Network Access, Data Access, Single Sign-On (SSO), Multi-Factor Authentication, Computer Security, Network Model
★ 4.5 (34) · Beginner · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: NIST 800-53, Security Controls, Security Requirements Analysis, Continuous Monitoring, Cyber Security Policies, Information Assurance, Information Systems Security, Cyber Security Assessment, Personally Identifiable Information, Data Security, Multi-Factor Authentication, Computer Security Awareness Training, Document Management, System Monitoring, Identity and Access Management, Incident Management, Encryption
★ 4.6 (54) · Mixed · Course · 1 - 3 Months

Skills you'll gain: Threat Modeling, Security Controls, Incident Response, Computer Security Incident Management, Intrusion Detection and Prevention, Vulnerability Management, Cybersecurity, Hardening, Network Security, Stakeholder Communications, Vulnerability Assessments, Relational Databases, Security Information and Event Management (SIEM), TCP/IP, Cyber Attacks, Bash (Scripting Language), Incident Management, Data Security, Security Management, Debugging
★ 4.7 (240) · Beginner · Professional Certificate · 3 - 6 Months

Skills you'll gain: Intrusion Detection and Prevention, Continuous Monitoring, Threat Management, Firewall, Incident Response, Network Security, Threat Detection, Network Monitoring, System Monitoring, Event Monitoring, Infrastructure Security, Cybersecurity, Anomaly Detection
★ 4.4 (48) · Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Open Web Application Security Project (OWASP), Mobile Security, Network Security, Cybersecurity, Cryptography, Penetration Testing, Intrusion Detection and Prevention, Vulnerability Assessments, Wireless Networks, Encryption, Application Security, Exploitation techniques, Web Applications, Cloud Security, Internet Of Things
★ 4.9 (19) · Intermediate · Course · 1 - 3 Months