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: Site Reliability Engineering, Docker (Software), Containerization, Kubernetes, Virtualization, Devops Tools, Microservices, Application Deployment, Virtual Machines, Cloud Development, Database Management, GitHub, Cloud-Based Integration, Scalability
Advanced · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Ansible, Devops Tools, Containerization, Docker (Software), Artifactory, Kubernetes, Prometheus (Software), Apache Maven, GitHub, CI/CD, DevOps, Continuous Integration, Version Control, Application Deployment, Software Development Tools, Build Tools, Continuous Deployment, Grafana, Application Performance Management, Continuous Delivery
Intermediate · Specialization · 3 - 6 Months

L&T EduTech
Skills you'll gain: Building Information Modeling, Civil Engineering, Construction Engineering, Building Design, Building Services Engineering, Facility Management, Landscape Architecture, Architectural Design, Energy and Utilities, Public Works, Transportation Operations, Sustainable Engineering, HVAC, Safety and Security, Sustainable Design, As-Built Drawings, Capacity Planning, Building Codes, Security Requirements Analysis, Safety Standards
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Authentications, Hardening, Key Management, Data Security, Cloud Security, Security Management, Security Controls, Encryption, Authorization (Computing), Identity and Access Management, Data Management, System Configuration, Servers, Configuration Management, Database Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: ASP.NET, Restful API, Object-Relational Mapping, Web Applications, User Accounts, Single Sign-On (SSO), .NET Framework, API Design, Application Programming Interface (API), Database Application, Authentications, Back-End Web Development, Performance Tuning, Authorization (Computing), Data Management, Relational Databases, Identity and Access Management, Model View Controller, Multi-Factor Authentication, Data Security
Intermediate · Course · 1 - 4 Weeks

Institut Mines-Télécom
Skills you'll gain: Internet Of Things, Wireless Networks, General Networking, Network Routing, Local Area Networks, Network Architecture, Network Protocols, Network Performance Management, Computer Networking, Communication Systems
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cyber Security Assessment
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Ajax, JSON, JavaScript Frameworks, Javascript, Application Programming Interface (API), Restful API, Web Applications, Real Time Data, Application Security
Intermediate · Course · 1 - 4 Weeks
Skills you'll gain: Django (Web Framework), Web Applications, Expense Management, Application Development, Database Application, Data Visualization, Business Process Automation, Python Programming, Data Modeling, Development Environment, Data Security, GitHub, Javascript, Project Documentation, Git (Version Control System)
Intermediate · Guided Project · Less Than 2 Hours

LearnKartS
Skills you'll gain: Control Objectives for Information and Related Technology (COBIT), Governance, Performance Management, IT Management, Process Management, Information Technology, Information Technology Architecture, Program Implementation, Governance Risk Management and Compliance, Enterprise Architecture, System Implementation, Compliance Management, Business Planning, Risk Management Framework, Organizational Structure, Continuous Improvement Process, Business Strategies
Intermediate · Course · 1 - 4 Weeks

Alibaba Cloud Academy
Skills you'll gain: Data Visualization Software, Big Data, Apache Hadoop, Apache Spark, Apache Hive, Distributed Computing, Data Processing, Data Warehousing, Data Analysis, Data Integration, Cloud Security, Artificial Intelligence and Machine Learning (AI/ML), SQL
Intermediate · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Spring Framework, Model View Controller, Java Platform Enterprise Edition (J2EE), Application Performance Management, Software Design Patterns, Java Programming, Java, Enterprise Architecture, Secure Coding, Software Architecture, Application Security, Security Assertion Markup Language (SAML), Dependency Analysis, Web Applications, Continuous Monitoring, OS Process Management, Debugging, Maintainability, Object Oriented Programming (OOP), Performance Tuning
Intermediate · Specialization · 3 - 6 Months