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.

LearnQuest
Skills you'll gain: Data Ethics, Responsible AI, Model Training, Model Evaluation, Predictive Modeling, AI Security, OpenAI, Data Collection, Machine Learning, Predictive Analytics, Information Privacy, Artificial Intelligence, Game Theory, Large Language Modeling, Algorithms, Data Preprocessing, AI literacy, Personally Identifiable Information, Machine Learning Algorithms, Analytical Skills
★ 4.6 (947) · 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, Control Objectives for Information and Related Technology (COBIT), Cryptography, Cloud Management, Generally Accepted Auditing Standards, Software Development Methodologies, Auditing, Internal Controls
★ 4.7 (67) · Intermediate · Specialization · 3 - 6 Months

LearnQuest
Skills you'll gain: Network Troubleshooting, Scenario Testing, Desktop Support, Hardware Troubleshooting, Help Desk Support, Information Technology, Technical Support, Network Infrastructure, Cloud Computing, Simulations, System Support, General Networking, Cloud Services, Computer Hardware, Network Security, Operating Systems
★ 3.3 (109) · Beginner · Course · 1 - 3 Months

28DIGITAL
Skills you'll gain: Real-Time Operating Systems, Embedded Software, Embedded Systems, Threat Modeling, Systems Architecture, System Software, Hardening, Debugging, Computer Architecture, Hardware Architecture, Internet Of Things, Application Security, General Networking, Wireless Networks, Operating Systems, Performance Tuning, System Requirements, Network Protocols, Open Source Technology
★ 4.4 (349) · Intermediate · Course · 1 - 3 Months

University of California, Irvine
Skills you'll gain: Threat Modeling, Threat Management, Risk Management, Business Continuity Planning, Asset Protection, Risk Analysis, Risk Management Framework, Risk Mitigation, Business Continuity, Risk Control, Vulnerability Assessments, Vulnerability Management, Security Controls
★ 4.6 (158) · Mixed · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: User Provisioning, Google Workspace, User Accounts, Identity and Access Management, Cloud Management, System Configuration, Configuration Management, Security Management, Security Controls
★ 4.6 (47) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Incident Response, Disaster Recovery, Incident Management, Computer Security Incident Management, Business Continuity, Business Continuity Planning, Intrusion Detection and Prevention, Cybersecurity, Cyber Security Policies, Investigation, Threat Detection, Threat Management, Digital Forensics
★ 4.6 (50) · Beginner · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: Google Gemini, Google Cloud Platform, Gemini, Generative AI, AI Security, Generative AI Agents, AI literacy, AI Product Strategy, Responsible AI, Cloud Platforms, Data Governance, Cloud Infrastructure
★ 4.7 (106) · Beginner · Course · 1 - 3 Months

University of Illinois Urbana-Champaign
Skills you'll gain: Distributed Computing, File Systems, Cloud Computing, Cloud Computing Architecture, Security Controls, Operating Systems, Transaction Processing, Information Systems Security, Data Centers, Cyber Security Policies, Authorization (Computing), Apache Hadoop, Data Store, Database Theory, Cloud Security, Authentications, Cryptography, NoSQL, Algorithms, Graph Theory
★ 4.5 (321) · Mixed · Course · 1 - 3 Months

University of Colorado System
Skills you'll gain: Cryptography, Cybersecurity, Encryption, Public Key Cryptography Standards (PKCS), Data Integrity
★ 4.5 (428) · Beginner · Course · 1 - 4 Weeks

Columbia University
Skills you'll gain: Portfolio Management, Investment Management, Portfolio Risk, Asset Management, Investments, Risk Modeling, Estimation, Market Liquidity, Risk Management, Financial Market, Financial Trading, Model Optimization, Equities, Securities (Finance), Statistical Methods, Risk Analysis, Transaction Processing, Securities Trading, Market Dynamics, Financial Analysis
★ 4.6 (47) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Business Analysis, Business Analysis Tools, Business Process Modeling, Stakeholder Analysis, Process Optimization, Requirements Management, Business Systems Analysis, Process Modeling, Stakeholder Management, Process Improvement and Optimization, Process Analysis, Data Modeling, Requirements Elicitation, Agile Methodology, Stakeholder Engagement, Requirements Analysis, Risk Analysis, Communication Planning, Business Requirements, Needs Assessment
★ 4.6 (108) · Intermediate · Specialization · 3 - 6 Months