# Cis Ubuntu1804 V220 4 3 1

> Ensure sudo is installed

- Skill: `cyberstrikeus/cis-ubuntu1804-v220-4-3-1` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1804-v220-4-3-1`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1804-v220-4-3-1/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-ubuntu1804-v220-4-3-1

---


# CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 - Control 4.3.1

## Profile Applicability

- Level 1 - Server
- Level 1 - Workstation

## Description

`sudo` allows a permitted user to execute a command as the superuser or another user, as specified by the security policy. The invoking user's real (not effective) user-ID is used to determine the user name with which to query the security policy.

## Rationale

`sudo` supports a plugin architecture for security policies and input/output logging. Third parties can develop and distribute their own policy and I/O logging plugins to work seamlessly with the `sudo` front end. The default security policy is sudoers, which is configured via the file `/etc/sudoers`.

## Audit Procedure

### Command Line

Run the following command to verify that `sudo` is installed:

```bash
dpkg-query -s sudo | grep -i status
```

### Expected Result

```
Status: install ok installed
```

## Remediation

### Command Line

Install sudo using the following command:

```bash
apt install sudo
```

## References

1. NIST SP 800-53 Rev. 5: AC-6(1)

## CIS Controls

v8 - 5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts - Restrict administrator privileges to dedicated administrator accounts on enterprise assets.

v7 - 4.3 Ensure the Use of Dedicated Administrative Accounts.

## Profile Applicability

- Level 1 - Server
- Level 1 - Workstation

## Assessment Status

Automated