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.

University of Illinois Urbana-Champaign
Skills you'll gain: Infectious Diseases, Epidemiology, Food and Beverage, Nutrition and Diet, Food Safety and Sanitation, Infection Control, Public Health and Disease Prevention, Public Health, Physiology, Preventative Care, Sustainable Systems, Immunology, Microbiology, Caregiving, Environment and Resource Management
★ 4.8 (631) · Beginner · Course · 1 - 3 Months

Simplilearn
Skills you'll gain: Prompt Engineering, AI Personalization, AI Security, GitHub Copilot, Generative AI, Infrastructure as Code (IaC), Legal Risk, Requirements Analysis, Test Tools, Software Testing, ChatGPT, Risk Analysis, Sprint Planning, Software Development Tools, Software Development Life Cycle, User Interface and User Experience (UI/UX) Design, Automation, Software Documentation, Artificial Intelligence, Software Architecture
★ 4.3 (67) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Audit Planning, Service Level Agreement, Data Governance, Systems Development Life Cycle, Data Loss Prevention, Security Testing, Network Security, Software Development Life Cycle, IT Management, Systems Development, Incident Management, IT General Controls (ITGC), Problem Management, Change Control, Control Objectives for Information and Related Technology (COBIT), Cryptography, Cloud Management, Generally Accepted Auditing Standards, Auditing, Internal Controls
★ 4.7 (72) · Intermediate · Specialization · 3 - 6 Months

LearnQuest
Skills you'll gain: Network Monitoring, Network Performance Management, Network Administration, Network Security, Routing Protocols, Network Troubleshooting, OSI Models, TCP/IP, Computer Networking, Network Routers, Network Switches, General Networking, Command-Line Interface, Network Routing, Networking Hardware, Network Architecture, Network Infrastructure, Cybersecurity, Network Model, Network Protocols
★ 4.6 (113) · Beginner · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Threat Management, Vulnerability Assessments, Incident Response, Incident Management, Computer Security Incident Management, Public Key Infrastructure, IT Security Architecture, Disaster Recovery, Vulnerability Management, Law, Regulation, and Compliance, Threat Detection, Cyber Security Assessment, Risk Management Framework, Risk Management, Compliance Management, Network Security, Security Architecture Review, Infrastructure Security, Cloud Security, Hardening
★ 4.7 (27) · Beginner · Specialization · 1 - 4 Weeks

Board Infinity
Skills you'll gain: ABAP RESTful Programming Model (RAP), SAP S/4HANA, Business Logic, SAP Applications, Unit Testing, Restful API, Application Deployment, Core Data (Software), Business Reporting, Code Reusability, Debugging, Behavior-Driven Development, Full-Stack Web Development, Test Script Development, Application Design, Application Development, Development Testing, Report Writing, Security Controls, HTML and CSS
★ 3.7 (44) · Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Operating System Administration, Local Area Networks, Software Installation, Command-Line Interface, Microsoft Windows, System Configuration, Systems Administration, TCP/IP, Linux Administration, Linux, General Networking, Patch Management, Operating Systems, User Accounts, Network Routers, System Monitoring, Network Troubleshooting, Mac OS, Identity and Access Management, Network Security
★ 4.9 (11) · Intermediate · Course · 1 - 3 Months

Universitat Autònoma de Barcelona
Skills you'll gain: General Data Protection Regulation (GDPR), Law, Regulation, and Compliance, Personally Identifiable Information, Security Controls, Information Privacy, Data Security, Data Governance, Data Ethics, Regulation and Legal Compliance, Data Management, Data Access, Regulatory Compliance, Risk Analysis, Informed Consent
★ 4.6 (151) · Beginner · Course · 1 - 4 Weeks

DeepLearning.AI
Skills you'll gain: Database Design, Database Development, LLM Application, Software Design Patterns, Databases, OpenAI API, Application Design, AI Integrations, Software Design, Software Architecture, AI Security, System Design and Implementation, Large Language Modeling, Object Oriented Design, Software Development, Query Languages, Secure Coding, Application Programming Interface (API), Performance Tuning
★ 4.7 (192) · Beginner · 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 (35) · Beginner · 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 (136) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: LangChain, LLM Application, Large Language Modeling, Prompt Engineering, API Design, MLOps (Machine Learning Operations), Performance Tuning, Microservices, Application Deployment, Kubernetes, Scalability, Site Reliability Engineering, DevOps, CI/CD, Docker (Software), Containerization, System Monitoring, Cloud Platforms, Python Programming, Security Controls
★ 3.1 (9) · Intermediate · Specialization · 3 - 6 Months