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

Packt
Skills you'll gain: Incident Response, Threat Modeling, Vulnerability Scanning, Vulnerability Management, Vulnerability Assessments, Threat Detection, Risk Management, Cybersecurity, Computer Security Incident Management, Secure Coding, Cyber Security Assessment, Incident Management, Security Testing, Cyber Governance, Intrusion Detection and Prevention, Risk Management Framework, Cyber Threat Intelligence, Network Infrastructure, Network Security, Security Information and Event Management (SIEM)
Intermediate · Specialization · 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

Amazon Web Services
Skills you'll gain: Cloud Computing Architecture, Amazon Web Services, Cloud Security, Operational Excellence, Reliability, Solution Architecture, Corporate Sustainability, Performance Tuning, Operational Efficiency, Cost Reduction, Security Strategy, Operational Analysis, System Requirements, Site Reliability Engineering, Scalability, Cost Management, Disaster Recovery, Interviewing Skills
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Network Troubleshooting, Display Devices, Cloud Computing Architecture, Networking Hardware, Virtual Machines, Dynamic Host Configuration Protocol (DHCP), Cloud Computing, Firewall, Mobile Security, USB, Computer Networking, Network Routers, Network Infrastructure, Network Switches, Cloud Security, Network Protocols, System Configuration, System Support, End User Training and Support
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Security Controls, IT General Controls (ITGC), Cloud Security, Cloud Computing, Cyber Security Assessment, Cybersecurity, ISO/IEC 27001, Control Objectives for Information and Related Technology (COBIT), Risk Management Framework, Data Security, Identity and Access Management, Incident Response, Technical Communication
Intermediate · Course · 3 - 6 Months

Skills you'll gain: Oracle Cloud, Oracle Databases, Identity and Access Management, Cloud Computing Architecture, Cloud Infrastructure, Database Application, Cloud Security, Data Storage, Computing Platforms, Cloud Services, Cloud Storage, Data Storage Technologies, Cloud Computing, Infrastructure As A Service (IaaS), Data Security, Scalability, Encryption, Network Routing
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

KodeKloud
Skills you'll gain: Docker (Software), Containerization, Application Deployment, Devops Tools, DevOps, Linux Commands, Software Development Tools, Data Storage, Development Environment, General Networking, Computer Networking, Software Versioning
Beginner · Course · 1 - 3 Months

Google Cloud
Skills you'll gain: Cloud Management, Cloud Solutions, Google Cloud Platform, Cloud Computing, DevOps, Operational Excellence, Cloud Infrastructure, Cost Management, Site Reliability Engineering, Operational Efficiency, Scalability, Corporate Sustainability, System Monitoring, Customer Support
Beginner · Course · 1 - 3 Months

University of Pittsburgh
Skills you'll gain: Triage, Mitigation, Crisis Intervention, Emergency Response, Safety and Security, Emergency Medicine, First Aid, Healthcare Ethics, Risk Analysis, Resourcefulness, Adaptability, Cultural Diversity, Water Quality
Beginner · Course · 1 - 3 Months

Skills you'll gain: Large Language Modeling, Cybersecurity, Prompt Engineering, Cyber Attacks, Threat Modeling, Cyber Security Assessment, Risk Analysis, Vulnerability Assessments, Network Security, Security Strategy, Risk Mitigation
Beginner · Course · 1 - 4 Weeks