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.

Packt
Skills you'll gain: Package and Software Management, Linux Administration, Shell Script, Ubuntu, User Accounts, Linux, Linux Servers, Linux Commands, Operating System Administration, Red Hat Enterprise Linux, Performance Tuning, Bash (Scripting Language), Kubernetes, Command-Line Interface, Network Troubleshooting, Containerization, Ansible, File Systems, Application Deployment, Authentications
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Bash (Scripting Language), Operating Systems, File Systems, Linux Commands, Linux, SQL, Unix, Database Management, Command-Line Interface, Relational Databases, Authorization (Computing), Authentications, User Accounts
Beginner · Course · 1 - 4 Weeks
Skills you'll gain: Application Security, Open Web Application Security Project (OWASP), OAuth, Data Validation, Authentications, Back-End Web Development, Security Testing, Secure Coding, Web Applications, Authorization (Computing), Vulnerability Scanning, Cyber Attacks, Threat Modeling, Software Testing, Distributed Denial-Of-Service (DDoS) Attacks, Data Integrity, Server Side, Security Strategy
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Linux Servers, System Configuration, User Accounts
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Linux Administration, Bash (Scripting Language), Network Monitoring, Cyber Security Assessment, Exploit development, Intrusion Detection and Prevention, System Configuration, Virtual Machines
Intermediate · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Vulnerability Assessments, Cyber Security Assessment, Network Monitoring, Penetration Testing, Virtual Private Networks (VPN), Command-Line Interface, Linux Commands, Network Troubleshooting, Cybersecurity, Linux, Software Installation, Intrusion Detection and Prevention, Network Security, Network Analysis
Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Network Troubleshooting, Linux, Kubernetes, Network Architecture, Network Administration, Computer Networking, Docker (Software), TCP/IP, Network Routers, Software-Defined Networking, Network Routing, Containerization, Virtual Private Networks (VPN), Network Model, Network Switches, Firewall, Virtualization, Network Protocols
Build toward a degree
Intermediate · Course · 1 - 3 Months
Skills you'll gain: Computer Security Incident Management, Endpoint Security, Incident Management, Incident Response, ISO/IEC 27001, Security Management, Vulnerability Scanning, Risk Management, Personally Identifiable Information, Vulnerability Assessments, Linux, Linux Administration, Infrastructure Security, Network Security, Threat Management, Event Monitoring, Role-Based Access Control (RBAC), Enterprise Risk Management (ERM), Business Risk Management, Security Strategy
Beginner · Specialization · 1 - 3 Months

Simplilearn
Skills you'll gain: Package and Software Management, File Systems, File Management, Linux Administration, Unix, Linux Commands, Unix Commands, Command-Line Interface, Operating Systems, System Monitoring, Open Source Technology, User Accounts, Software Installation
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Lightweight Directory Access Protocols, Git (Version Control System), Authentications, Collaborative Software, Linux Servers, Linux Administration, Linux, Version Control, Open Source Technology, User Accounts
Intermediate · Course · 1 - 4 Weeks

Pearson
Skills you'll gain: Virtualization, Dynamic Host Configuration Protocol (DHCP), Linux Administration, Linux Servers, Network Administration, Virtual Machines, Linux, Network Architecture, Information Technology, Virtual Environment, System Configuration, Software Installation, Command-Line Interface
Intermediate · Course · 1 - 4 Weeks

Pearson
Skills you'll gain: Linux Administration, Containerization, Linux, Linux Commands, OS Process Management, Operating System Administration, File Systems, Operating Systems, Data Storage, Cloud Storage, System Software, Data Storage Technologies, Network Administration, Computer Networking, Performance Tuning, System Configuration, C (Programming Language), Systems Architecture, System Monitoring, Git (Version Control System)
Intermediate · Course · 1 - 4 Weeks