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 Minnesota
Skills you'll gain: Open Web Application Security Project (OWASP), Cloud Security, Authentications, Key Management, Cloud Applications, Application Security, Secure Coding, DevSecOps, Cloud Computing, Cloud Services, Identity and Access Management, Multi-Factor Authentication, Security Testing, Cryptography, Web Services, Server Side
Intermediate · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Incident Management, Incident Response, Computer Security Incident Management, Disaster Recovery, Security Management, Business Continuity, Threat Management, Crisis Management, Business Continuity Planning, Contingency Planning, Gap Analysis, Risk Analysis, Legal Risk, Digital Forensics, Continuous Improvement Process, Governance Risk Management and Compliance, Risk Mitigation, Team Management
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Application Security, Patch Management, Data Security, Information Systems Security, Cloud Security, Cybersecurity, Cyber Attacks, Internet Of Things, Mobile Security, Hardening, Personally Identifiable Information, General Data Protection Regulation (GDPR), Network Security, Information Privacy, Vulnerability Management, Release Management, Data Storage, Operating Systems, Cloud Services, Cloud Platforms
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Vulnerability Management, Identity and Access Management, IT Security Architecture, Incident Response, Security Controls, Endpoint Security, Event Monitoring, Cybersecurity, Data Security, Infrastructure Security, Mobile Security, Threat Detection, Firewall, Encryption, Virtual Private Networks (VPN), Digital Forensics, Disaster Recovery
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Network Security, Mobile Security, System Monitoring, Network Monitoring, Security Controls, Internet Of Things, Wireless Networks, Application Security, Information Systems Security, Continuous Monitoring, Authorization (Computing), Cybersecurity, Identity and Access Management, Cyber Attacks, General Networking, Authentications, Cloud Security, TCP/IP, Cloud Services, Cloud Platforms
Mixed · Course · 1 - 4 Weeks

Illinois Tech
Skills you'll gain: Cybersecurity, Cyber Attacks, Network Security, Information Systems Security, Computer Security, Cryptography, Disaster Recovery, Application Security, Cyber Operations, Cyber Security Policies, Cryptographic Protocols, IT Security Architecture, Telecommunications, Network Administration, NIST 800-53, Infrastructure Security, Security Controls, Data Security, Encryption, Governance Risk Management and Compliance
Build toward a degree
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Shell Script, Bash (Scripting Language), Linux Commands, Unix Shell, Linux, Scripting, Unix Commands, Scripting Languages, Debugging, Command-Line Interface, File I/O, Programming Principles
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: IT Security Architecture, Network Security, Infrastructure Security, Software-Defined Networking, Application Security, Zero Trust Network Access, Network Architecture, Threat Modeling, Cybersecurity, Enterprise Architecture, Secure Coding, Cloud Security, Scenario Testing, Cryptography, Vulnerability Assessments
Advanced · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Risk Management, Risk Analysis, Risk Management Framework, Risk Modeling, Risk Appetite, Business Risk Management, Cyber Risk, Risk Mitigation, Threat Management, Enterprise Risk Management (ERM), Risk Control, Vulnerability Assessments, Vulnerability Management, Threat Detection, Security Controls, Stakeholder Communications, Vulnerability, Stakeholder Engagement
Mixed · Course · 1 - 4 Weeks

Microsoft
Skills you'll gain: Microsoft Azure, Threat Modeling, Cloud Security, Continuous Monitoring, System Monitoring, Security Information and Event Management (SIEM), Security Management, Threat Detection, Threat Management, Application Performance Management, Event Monitoring, Vulnerability Management, Brute-force attacks, Incident Response, Query Languages
Intermediate · Course · 1 - 4 Weeks

University of Minnesota
Skills you'll gain: Cloud Security, Data Security, Cloud Services, Cloud Storage, Personally Identifiable Information, General Data Protection Regulation (GDPR), Information Privacy, Data Governance, Data Integrity, Cloud Platforms, Security Controls, Health Insurance Portability And Accountability Act (HIPAA) Compliance, Relational Databases, Encryption, SQL
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Cyber Security Assessment, Cybersecurity, Security Testing, Test Planning
Intermediate · Course · 1 - 4 Weeks