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.

Duke University
Skills you'll gain: Loans, Lending and Underwriting, FinTech, Key Management, Cryptography, Cryptographic Protocols, Digital Assets, Market Liquidity, Financial Trading, Transaction Processing, Public Key Infrastructure, Supply Management
★ 4.9 (479) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Routing Protocols, TCP/IP, Network Troubleshooting, OSI Models, Network Switches, Data Centers, Virtual Local Area Network (VLAN), Network Protocols, Network Security, Network Administration, General Networking, Network Routing, Virtualization and Virtual Machines, Computer Networking, Virtual Machines, Network Monitoring, Wide Area Networks, Network Model, Networking Hardware, Local Area Networks
★ 4.8 (62) · Intermediate · Specialization · 3 - 6 Months

Microsoft
Skills you'll gain: Microsoft Azure, Serverless Computing, Cloud Development, Microsoft Power Automate/Flow, Event-Driven Programming, Cloud-Based Integration, Business Process Automation, Application Programming Interface (API), Webhook Security, GitHub
★ 4.4 (134) · Intermediate · Course · 1 - 3 Months

Birla Institute of Technology & Science, Pilani
Skills you'll gain: Operating Systems, Operating System Administration, Memory Management, OS Process Management, System Software, System Programming, Command-Line Interface, Linux Administration, File Systems, System Monitoring, Performance Tuning, Package and Software Management, Systems Architecture, File Management, Algorithms, Cloud Platforms, User Accounts, Security Controls, Data Sharing
★ 4.9 (11) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Vulnerability Scanning, Information Technology Architecture, Business Continuity Planning, Cyber Security Assessment, Computer Security Awareness Training, Cyber Risk, Compliance Management, Internal Controls, Governance, Continuous Monitoring, Data Management, Computer Security, Key Performance Indicators (KPIs), Regulatory Requirements, Business Analysis, Organizational Structure, Human Factors (Security), Accountability, Stakeholder Communications, Artificial Intelligence
★ 4.9 (52) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Network Monitoring, Network Security, Incident Response, Anomaly Detection, Network Analysis, Digital Forensics, Cyber Security Assessment, Network Protocols, Threat Detection, Technical Communication, Distributed Denial-Of-Service (DDoS) Attacks, Computer Security, Cybersecurity
★ 4.8 (17) · Intermediate · Course · 1 - 3 Months

University of California, Davis
Skills you'll gain: Open Web Application Security Project (OWASP), Authentications, Exploit development, Penetration Testing, Security Strategy, Vulnerability Scanning, Security Testing, Application Security, Vulnerability Assessments, Code Review, Vulnerability Management, Secure Coding, Authorization (Computing), Exploitation techniques, Java, Security Controls, Java Programming, Patch Management, Dependency Analysis, Docker (Software)
★ 4.4 (66) · Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: OSI Models, Network Security, TCP/IP, Network Architecture, Network Protocols, Network Routing, Network Routers, Computer Networking, Infrastructure Security, Routing Protocols, Public Key Infrastructure, Network Model, Cryptographic Protocols, Web Applications, Application Servers
★ 4.6 (91) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Embedded Software, Performance Tuning, System Programming, Software Development Tools, Embedded Systems, Memory Management, Microarchitecture, Software Development, Hardware Architecture, Debugging, System Software, Secure Coding, Build Tools, Application Security, Computer Architecture, System Configuration, Programming Principles, C (Programming Language), Digital Signal Processing, Real-Time Operating Systems
★ 4.7 (205) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Identity and Access Management, Authentications, User Provisioning, OAuth, User Accounts, Security Controls, Role-Based Access Control (RBAC), Authorization (Computing), Single Sign-On (SSO), Cryptographic Protocols, Enterprise Security, Computer Security
★ 4.7 (24) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Prompt Engineering, Microsoft Copilot, Data Ethics, Law, Regulation, and Compliance, Generative AI, Responsible AI, Data Governance, Microsoft 365, Personalized Campaigns, AI powered creativity, Sales Enablement, Marketing Automation, Marketing Operations, Customer experience improvement, Regulatory Compliance, Business Process Automation, Compliance Management, AI literacy, Microsoft Office, Critical Thinking
★ 4.5 (179) · Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Microsoft Excel, Pivot Tables And Charts, Excel Formulas, Spreadsheet Software, Business Reporting, Data Visualization, Interactive Data Visualization, Excel Macros, Data Presentation, Dashboard, Forecasting, Dashboard Creation, Data Analysis, Data Visualization Software, Predictive Modeling, Data Validation, Data Entry, Data Management, Data Security, Data Integrity
★ 4.8 (132) · Beginner · Specialization · 1 - 3 Months