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.

Coursera
Skills you'll gain: Cryptography, Encryption, Application Development, Security Engineering, Application Security, C++ (Programming Language)
Intermediate · Guided Project · Less Than 2 Hours

Tel Aviv University
Skills you'll gain: World History, European History, Social Studies, International Relations, Political Sciences, Public Safety and National Security, Demography, Cultural Diversity
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Networking Hardware, General Networking, Wireless Networks, Network Architecture, Computer Networking, Network Protocols, Local Area Networks, TCP/IP, Network Security, Network Routers, Network Switches, Wide Area Networks, System Configuration, Servers
Build toward a degree
Beginner · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Security Management, Cyber Governance, IT Management, Cyber Security Strategy, Cyber Risk, Cyber Security Policies, Security Strategy, Key Performance Indicators (KPIs), Leadership and Management, Technical Communication, Leadership, Program Management, Risk Management, Communication
Beginner · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: Data Governance, Governance, Data Management, Compliance Management, Data Architecture, General Data Protection Regulation (GDPR), Data Strategy, Regulatory Compliance, Data Security, Cloud Security, Metadata Management, Information Management, Regulatory Requirements, Data Integrity, Data Quality, Data Access, Cloud Computing, Risk Management
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Information Privacy, General Data Protection Regulation (GDPR), Personally Identifiable Information, Data Security, Data Governance, Data Ethics, Data Loss Prevention, Security Controls, Regulatory Compliance, Compliance Management, Compliance Training, Data Integrity, Security Strategy, Regulatory Requirements, Incident Response
Beginner · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: C (Programming Language), Data Structures, Application Security, System Programming, Programming Principles, Performance Tuning
Intermediate · Course · 1 - 4 Weeks

Icahn School of Medicine at Mount Sinai
Skills you'll gain: Bioinformatics, Unsupervised Learning, Biostatistics, Biology, Machine Learning Algorithms, Data Processing, Statistical Methods, Systems Engineering, Unix Commands, Linux Commands
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Digital Transformation, Business Analysis, Requirements Elicitation, Gap Analysis, Analysis, Business Analytics, Business Requirements, Requirements Analysis, Systems Analysis, Business Process Modeling, Technology Strategies, Microsoft Excel, Project Management, Stakeholder Management, Stakeholder Communications, Change Management
Beginner · Course · 1 - 4 Weeks
Rice University
Skills you'll gain: Financial Market, Investments, Securities (Finance), Financial Systems, Investment Management, Securities Trading, Capital Markets, Equities, Finance, Financial Services, Market Liquidity, Asset Management, Portfolio Management, Derivatives, Fixed Asset, Cash Flows
Mixed · Course · 1 - 4 Weeks

University of California, Davis
Skills you'll gain: Threat Modeling, Open Web Application Security Project (OWASP), Secure Coding, Cryptography, Exploit development, Authentications, Encryption, Penetration Testing, Vulnerability Assessments, Data Security, Application Security, Security Controls, Vulnerability Management, Security Testing, Software Design, C and C++, Verification And Validation, Java, Programming Principles, Cybersecurity
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Flutter (Software), Mobile Development, React Native, Apple iOS, iOS Development, User Story, Android Development, User Interface (UI), Mobile Security, User Interface and User Experience (UI/UX) Design, Application Development, Cross Platform Development, Application Programming Interface (API), Software Development Tools, Development Environment, UI Components, Application Deployment, Figma (Design Software), Databases, User Interface (UI) Design
Beginner · Specialization · 3 - 6 Months