Linux admins,

Not every security issue begins with a new CVE. Sometimes the biggest risks come from trusted tools, accepted workflows, or attacker techniques that blend into normal administrative activity. This week, we're highlighting two Linux security topics worth reviewing before they become bigger problems.

Yours in Open Source,

Dv Signature Newsletter 2026 Esm W100

Dave Wreski, Founder

How Attackers Maintain Access Through SSH Persistence

SSH is one of the most trusted services on Linux systems, which also makes it an attractive persistence mechanism after a compromise. A single unauthorized key added to an existing account can provide long-term access without triggering password changes or repeated exploit attempts. Reviewing authorized keys, login activity, and SSH configuration should be part of every incident response process.

→ Learn how to detect and remove SSH persistence on Linux

 

Can AI Really Automate Linux Penetration Testing?

AI-powered penetration testing frameworks are gaining attention by combining large language models with established offensive security tools. While they can accelerate reconnaissance and workflow automation, they still require human oversight and security expertise. Understanding where automation helps and where it falls short is becoming increasingly important for Linux security teams.

→ Read about Dark Moon and AI-driven penetration testing on Linux