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: Blockchain, Threat Modeling, Application Security, Computer Security, Security Controls, Cybersecurity, Security Engineering, Data Security, Network Security, Information Systems Security, Cryptography, Vulnerability Assessments, Secure Coding, Cryptographic Protocols, Encryption, Key Management, Risk Management, Public Key Cryptography Standards (PKCS), Data Integrity, Distributed Computing
Intermediate · Course · 1 - 3 Months

Infosec
Skills you'll gain: Application Security, Serverless Computing, Secure Coding, Risk Management Framework, Threat Modeling, Cloud Security, Infrastructure Security, Cloud Services, Web Applications, Cloud Platforms, Javascript, Node.JS, Amazon Web Services
Intermediate · Course · 1 - 4 Weeks

Fortinet, Inc.
Skills you'll gain: Network Troubleshooting, Firewall, Network Monitoring, Network Security, Virtual Private Networks (VPN), Network Performance Management, Lightweight Directory Access Protocols, System Monitoring, Authentications, Performance Tuning, System Configuration, Cybersecurity, Malware Protection
Intermediate · Course · 1 - 3 Months

Macquarie University
Skills you'll gain: Cryptography, Encryption, Data Security, Cybersecurity, Application Security, Key Management, Network Security, Public Key Infrastructure, Data Encryption Standard, Security Engineering, Blockchain, Wireless Networks, Security Management, Virtual Private Networks (VPN), Intellectual Property, Data Integrity, Authentications, Hardware Architecture, Emerging Technologies
Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Event Monitoring, General Networking, Network Architecture, Systems Integration, Incident Response, TCP/IP, Cybersecurity, Security Management, Networking Hardware, Computer Networking, Network Security, Threat Detection, Cyber Security Policies, Security Information and Event Management (SIEM), Enterprise Application Management, Data Governance, Command-Line Interface, Security Strategy, Cloud Management, Network Troubleshooting
Beginner · Specialization · 1 - 3 Months

University of London
Skills you'll gain: Network Security, OSI Models, TCP/IP, Threat Modeling, Network Protocols, Computer Networking, Cybersecurity, Application Security, Network Architecture, Cryptographic Protocols, Vulnerability Assessments, Network Infrastructure, Network Routing
Beginner · Course · 1 - 3 Months

Skills you'll gain: Bash (Scripting Language), Systems Administration, Operating System Administration, Shell Script, Linux Commands, Linux Administration, Unix Shell, Linux, Unix, Scripting
Beginner · Guided Project · Less Than 2 Hours

Arizona State University
Skills you'll gain: Cyber Attacks, Data Security, Safety and Security, Cybersecurity, Computer Security Awareness Training, Information Systems Security, Security Strategy, Security Controls, Threat Modeling, Disaster Recovery, Data Loss Prevention, Incident Response, Vulnerability Assessments, Patch Management
Mixed · Course · 1 - 3 Months

University of Colorado System
Skills you'll gain: Windows Servers, Computer Security, Linux Administration, Contingency Planning, Disaster Recovery, Authorization (Computing), Linux, Linux Servers, Microsoft Windows, Authentications, Business Continuity Planning, Enterprise Application Management, OSI Models, User Accounts, Group Policy, Security Management, Operating System Administration, Systems Administration, Virtualization, Cybersecurity
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Cloud Computing Architecture, Cloud Security, Cloud Computing, Incident Response, IT Security Architecture, Capacity Management, Application Security, Security Controls, Network Security, Hardening, Scalability, Emerging Technologies, Identity and Access Management, Encryption
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Ansible, Puppet (Configuration Management Tool), Software-Defined Networking, Network Administration, Security Awareness, Threat Modeling, Chef (Configuration Management Tool), Information Systems Security, Virtual Private Networks (VPN), JSON, Authentications, Computer Networking, Network Architecture, Authorization (Computing), Automation, Configuration Management, Application Programming Interface (API)
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Hardware Troubleshooting, Computer Security Awareness Training, Information Systems Security, Malware Protection, Data Security, Technical Support and Services, Encryption, Security Awareness, Authentications, Patch Management, Technical Support, Firewall, Data Integrity
Beginner · Course · 1 - 4 Weeks