# Cis Ubuntu1204 V110 2 14

> Add nodev Option to /run/shm Partition

- Skill: `cyberstrikeus/cis-ubuntu1204-v110-2-14` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1204-v110-2-14`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1204-v110-2-14/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-ubuntu1204-v110-2-14

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# 2.14 Add nodev Option to /run/shm Partition (Scored)

## Profile Applicability

- Level 1

## Description

The `nodev` mount option specifies that the `/run/shm` (temporary filesystem stored in memory) cannot contain block or character special devices.

## Rationale

Since the `/run/shm` filesystem is not intended to support devices, set this option to ensure that users cannot attempt to create special devices in `/run/shm` partitions.

## Audit Procedure

### Using Command Line

```bash
grep /run/shm /etc/fstab | grep nodev
mount | grep /run/shm | grep nodev
```

## Expected Result

Both commands should return output showing `nodev` is set. If either command emits no output then the system is not configured as recommended.

## Remediation

### Using Command Line

Edit the `/etc/fstab` file and add `nodev` to the fourth field (mounting options of entries that have mount points that contain `/run/shm`). See the `fstab(5)` manual page for more information.

```bash
mount -o remount,nodev /run/shm
```

## Default Value

By default, the `nodev` option is not set on the `/run/shm` partition.

## References

- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

## Profile

Level 1 - Scored