# Cis Ubuntu1604 V200 5 6

> Ensure root login is restricted to system console

- Skill: `cyberstrikeus/cis-ubuntu1604-v200-5-6` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1604-v200-5-6`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1604-v200-5-6/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-ubuntu1604-v200-5-6

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# Ensure root login is restricted to system console

**Profile Applicability:**

- Level 1 - Server
- Level 1 - Workstation

**Assessment Status:** Manual

## Description

The file `/etc/securetty` contains a list of valid terminals that may be logged in directly as root.

## Rationale

Since the system console has special properties to handle emergency situations, it is important to ensure that the console is in a physically secure location and that unauthorized consoles have not been defined.

## Audit Procedure

### Command Line

```bash
cat /etc/securetty
```

## Remediation

### Command Line

Remove entries for any consoles that are not in a physically secure location.

## References

None

## CIS Controls

| Controls Version | Control                                                                                                                                                                                                                                                                                                  |
| ---------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| v7               | 4.3 Ensure the Use of Dedicated Administrative Accounts - Ensure that all users with administrative account access use a dedicated or secondary account for elevated activities. This account should only be used for administrative activities and not internet browsing, email, or similar activities. |

## Profile

- **Level 1 - Server**
- **Level 1 - Workstation**