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Systems Security

System and Network Hardening

Reduce attack surface across Linux hosts, networks, credentials, files, administrative interfaces, and volatile environments.

FamilyDefensive Security Operations
LevelFoundational to intermediate
Courses9
Estimated time2.25-3 hours
Audience

System administrators, Security engineers, Homelab operators

Outcome

Reduce attack surface across Linux hosts, networks, credentials, files, administrative interfaces, and volatile environments.

Ordered sequence

Courses in this path

9 courses
Course 0110 modules
Linux Security Fundamentals

Launch the canonical Truth Surge open course for this step in the path.

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Course 0210 modules
System Hardening Fundamentals

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Course 0310 modules
Network Hardening Fundamentals

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Course 0410 modules
Password Security and Credential Storage

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Course 0510 modules
Secrets Management

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Course 0610 modules
Secure File Handling

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Course 0710 modules
Introduction to Secure Shell Scripting

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Course 0810 modules
Introduction to Secure Powershell Scripting

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Course 0910 modules
Booting Linux From Ram Drive

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Related routes
Next steps
Defensive Security Operations
Detection Engineer and Threat Hunter

Move from telemetry and adversary models into detection development, exposure prioritization, and proactive hunting.

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Defensive Security Operations
Digital Forensics and Incident Response

Establish an incident-response workflow and investigate evidence across desktop, mobile, browser, removable-media, and malware sources.

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Defensive Security Operations
Cloud Security Operations

Operate cloud defenses across identity, containers, exposure management, resilience, and incident response.

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