What is linux-security-audit?

A Linux security audit tool that checks how a computer, disk image, or container is configured and reports risks by priority. Linux is an operating system, and hardening means reducing ways it can be attacked.

Use it to inspect kernel settings, mounts, permissions, confinement tools, services, SSH, TLS, web servers, secrets, container images, and differences between intended and running configurations.

It brings configuration checks and live service tests into one report, making security weaknesses easier to find and rank.

linux-security-audit — Plugin by jonaslejon

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code

/plugin marketplace add jonaslejon/linux-security-audit-plugin

agentmods

npx agentmods add plugins/jonaslejon/linux-security-audit-plugin/linux-security-audit

Clone the repo

git clone --depth 1 https://github.com/jonaslejon/linux-security-audit-plugin

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

linux-security-audit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/linux-security-audit/.claude-plugin/plugin.json · 29 lines

What it actually says

{
  "name": "linux-security-audit",
  "version": "1.7.0",
  "description": "Audit a Linux host's security hardening posture and produce a risk-ranked report, using both passive config inspection and active service probing. Runs against a live host, a mounted image (--root), or a container.",
  "author": {
    "name": "Jonas Lejon",
    "url": "https://github.com/jonaslejon"
  },
  "license": "MIT",
  "homepage": "https://github.com/jonaslejon/linux-security-audit-plugin",
  "repository": "https://github.com/jonaslejon/linux-security-audit-plugin",
  "keywords": [
    "linux",
    "security",
    "hardening",
    "audit",
    "cis",
    "stig",
    "sysctl",
    "selinux",
    "ssh",
    "tls",
    "ebpf",
    "docker",
    "compliance",
    "golden-image"
  ]
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2d ago First seen · 29 lines scan A ff1e570d56e5

Subscribe to this mod's changes

linux-security-audit is a plugin published in the GitHub repository jonaslejon/linux-security-audit-plugin (13 stars, last pushed 18d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Security

linux-security-audit

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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