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.

Skills you'll gain: Network Troubleshooting, Display Devices, Cloud Computing Architecture, Networking Hardware, Dynamic Host Configuration Protocol (DHCP), Cloud Computing, Firewall, Virtual Networking, Mobile Security, Network Infrastructure, USB, Computer Networking, Cloud Services, Network Support, Microarchitecture, System Configuration, Computer Systems, Data Storage, Information Technology, Memory Management
★ 4.5 (93) · Intermediate · Specialization · 3 - 6 Months

Duke University
Skills you'll gain: Loans, FinTech, General Lending, Key Management, Cryptography, Cryptographic Protocols, Digital Assets, Market Liquidity, Financial Trading, Finance, Transaction Processing, Public Key Infrastructure, Asset Protection, Supply Management
★ 4.9 (492) · Intermediate · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: Enterprise Architecture, Stakeholder Management, Business Architecture, Stakeholder Engagement, Risk Management, Information Technology Architecture, Stakeholder Analysis, Enterprise Modeling, Stakeholder Communications, Data Architecture, Governance, Infrastructure Architecture, Gap Analysis, Business Transformation, Change Management, Information Systems
★ 4.5 (426) · Beginner · Course · 1 - 4 Weeks
Amazon Web Services
Skills you'll gain: Amazon Web Services, Data Migration, Cloud Management, Cloud Infrastructure, Cloud Security, Data Import/Export, Cloud Computing, Cloud Services, Cloud Applications, Cloud Computing Architecture, Infrastructure Architecture, Cloud Deployment, Managed Services
★ 4.5 (258) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Quality Monitoring, Cloud API, Application Programming Interface (API), Cloud Hosting, Webhook Security, Account Management, Business Communication, Data Migration
★ 4.5 (107) · Intermediate · Course · 1 - 4 Weeks

University of Colorado System
Skills you'll gain: Local Area Networks, Network Protocols, Computer Networking, Network Architecture, TCP/IP, Network Performance Management, General Networking, Network Engineering, Wireless Networks, Telecommunications, Digital Communications
★ 4.7 (540) · Mixed · Course · 1 - 3 Months

Skills you'll gain: Penetration Testing, Vulnerability Assessments, Network Protocols, Network Security, Network Analysis, Network Monitoring, Image Analysis, Virtual Machines, Virtualization and Virtual Machines, Virtual Environment, Open Source Technology, Malware Protection, Command-Line Interface, Software Installation, Linux, Microsoft Windows
★ 4.6 (14) · Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Invoicing, Billing & Invoicing, Inventory Management, Inventory Management System, Tax Management, Accounting Software, Customer Relationship Management, Billing, Customer Relationship Management (CRM) Software, Sales Tax, Small Business Accounting, Accounting and Finance Software, Accounting, Security Controls, Payroll Systems
★ 4.5 (86) · Beginner · Guided Project · Less Than 2 Hours

University of Illinois Urbana-Champaign
Skills you'll gain: Virtual Networking, Cloud Infrastructure, Network Architecture, Computer Networking, Network Infrastructure, Cloud Computing Architecture, General Networking, Software-Defined Networking, Network Planning And Design, Cloud Computing, Virtualization, Network Routing, TCP/IP, Wide Area Networks, Data Centers, Network Performance Management, Network Switches, Virtual Machines, Virtualization and Virtual Machines, Python Programming
★ 4.4 (304) · Mixed · Course · 1 - 3 Months

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, AI literacy, Personally Identifiable Information, Machine Learning Algorithms, Analytical Skills, Analysis
★ 4.7 (995) · Beginner · Specialization · 3 - 6 Months

University of Michigan
Skills you'll gain: Augmented and Virtual Reality (AR/VR), Augmented Reality, Virtual Reality, Disabilities, Emerging Technologies, Virtual Environment, Display Devices, Diversity Awareness, Design Strategies, Human Computer Interaction, Information Privacy, Diversity Equity and Inclusion Initiatives, Innovation, Human Factors (Security), Ethical Standards And Conduct
★ 4.7 (418) · 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, Cyber Security Policies, Investigation, Threat Detection, Contingency Planning, Threat Management, Digital Forensics
★ 4.6 (51) · Beginner · Course · 1 - 4 Weeks