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.

Macquarie University
Skills you'll gain: Mobile Security, Anomaly Detection, Criminal Investigation and Forensics, Cyber Security Strategy, Cyber Threat Intelligence, Threat Detection, Investigation, Cyber Attacks, File Systems, Intrusion Detection and Prevention, Fraud detection, Mobile Development, Cybersecurity, Applied Machine Learning, Malware Protection, Cyber Security Policies, Apple iOS, Threat Modeling, Artificial Intelligence and Machine Learning (AI/ML), Data Security
Intermediate · Specialization · 3 - 6 Months
LearnQuest
Skills you'll gain: Blockchain, Key Management, Threat Modeling, Application Security, Computer Security, Public Key Infrastructure, Security Controls, Cryptography, Cybersecurity, Network Security, Information Systems Security, Data Security, Security Engineering, Vulnerability Assessments, Secure Coding, Cryptographic Protocols, Infrastructure Security, Encryption, Security Testing, Solution Design
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Penetration Testing, Security Testing, Data Management, Records Management, Cloud Computing Architecture, Authentications, Firewall, Cyber Attacks, Cybersecurity, Malware Protection, System Testing, Cyber Threat Intelligence, Authorization (Computing), General Data Protection Regulation (GDPR), Cloud Computing, Data Governance, Active Directory, Data Ethics, Responsible AI, LLM Application
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Threat Management, Cybersecurity, Risk Management, Incident Response, Vulnerability Management, Security Information and Event Management (SIEM), Security Controls, Information Systems Security, Enterprise Security, Risk Analysis, Threat Detection, Information Assurance, Open Web Application Security Project (OWASP), Auditing, Compliance Auditing
Beginner · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Data Security, Personally Identifiable Information, Information Assurance, Security Management, Data Governance, Data Loss Prevention, Data Management, Threat Management, Threat Detection, Encryption, Identity and Access Management
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Threat Modeling, Incident Response, IT Security Architecture, Secure Coding, Application Security, Identity and Access Management, Information Systems Security Assessment Framework (ISSAF), Security Testing, Continuous Monitoring, Information Systems Security, Network Security, Security Strategy, Zero Trust Network Access, Security Awareness, Security Information and Event Management (SIEM), Risk Management Framework, Disaster Recovery, Security Controls, Cybersecurity, Enterprise Architecture
Beginner · Specialization · 1 - 3 Months

Google Cloud
Skills you'll gain: Security Information and Event Management (SIEM), System Configuration, Google Cloud Platform, Event Monitoring, Docker (Software), Linux Administration, Software Installation, Real Time Data, Cloud Computing, Data Security
Intermediate · Project · Less Than 2 Hours

LearnQuest
Skills you'll gain: Threat Modeling, Network Security, Internet Of Things, Identity and Access Management, Encryption, Security Engineering, Infrastructure Security, Cybersecurity, Security Controls, Threat Management, Cloud Security, Vulnerability Assessments, Threat Detection, Cloud Solutions, Systems Architecture, Cryptography, Information Privacy
Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Email Security, Mobile Security, Network Security, Open Web Application Security Project (OWASP), Network Monitoring, Threat Detection, TCP/IP, Network Analysis, Network Protocols, Cybersecurity, Application Security, Vulnerability Scanning, Wireless Networks, Splunk, Information Privacy
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Email Security, Incident Response, Computer Security Incident Management, Malware Protection, Cybersecurity, Network Security, Intrusion Detection and Prevention, Event Monitoring, Cyber Security Strategy, Threat Detection, Distributed Denial-Of-Service (DDoS) Attacks, Security Awareness, Wireless Networks
Intermediate · Course · 1 - 4 Weeks

Microsoft
Skills you'll gain: API Design, Restful API, Middleware, Application Deployment, Software Testing, Postman API Platform, Microsoft Azure, Cloud Development, Software Documentation, Cloud Applications
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Incident Response, Vulnerability Management, Continuous Monitoring, Public Key Infrastructure, Security Management, Business Continuity Planning, Cryptography, Endpoint Security, Disaster Recovery, Computer Security Incident Management, Encryption, Network Security, Authentications, Mobile Security, OSI Models, System Monitoring, Investigation, Security Controls, Security Strategy, Risk Analysis
Beginner · Specialization · 1 - 3 Months