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Linux Security articles

SSH hardening, permissions, auditd, firewalls, logging, and CIS controls

Secure Linux systems using practical hardening techniques, SSH configuration, permissions, PAM, auditd, firewall rules, logging, patching, and CIS benchmark controls.

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Collection snapshot

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Published articles in this collection

Best for: IT administrators, Linux engineers, and infrastructure security teams

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Published articles

8

Example topics

3

Learning paths

How to use this collection

Read → apply → reference

Each article is written as a practical knowledge block you can use on the job, in labs, or during audits.

1

Learn the concept

Understand the threat, control, or workflow with clear explanations.

2

Follow the checklist

Apply steps, commands, or evidence collection in your environment.

3

Connect to practice

Jump to related labs, tutorials, and tools to reinforce skills.

Example topics in this collection

  • SSH hardening
  • Linux permissions
  • sudo access review
  • PAM policies
  • auditd
  • UFW/firewalld
  • system logs
  • CIS Linux benchmark

Catalog

Articles in linux security

Practical guides, checklists, and explainers focused on this security domain.

Outcomes

What you'll learn

  • Harden Linux servers with production-focused configuration and access controls
  • Review sudo, PAM, file permissions, and audit logging like real ops teams
  • Collect evidence aligned with CIS benchmarks and compliance audits
  • Troubleshoot common Linux security issues with step-by-step guides

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