# Cis Ubuntu1604 V200 1 2 2

> Ensure GPG keys are configured

- Skill: `cyberstrikeus/cis-ubuntu1604-v200-1-2-2` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1604-v200-1-2-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1604-v200-1-2-2/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-v200-1-2-2

---


# CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - 1.2.2

## Profile Applicability

- Level 1 - Server
- Level 1 - Workstation

## Description

Most packages managers implement GPG key signing to verify package integrity during installation.

## Rationale

It is important to ensure that updates are obtained from a valid source to protect against spoofing that could lead to the inadvertent installation of malware on the system.

## Audit Procedure

### Command Line

Verify GPG keys are configured correctly for your package manager:

```bash
apt-key list
```

## Expected Result

Verify GPG keys are configured correctly for your package manager.

## Remediation

### Command Line

Update your package manager GPG keys in accordance with site policy.

## Default Value

Not applicable.

## References

None.

## CIS Controls

| Controls Version | Control                                                      |
| ---------------- | ------------------------------------------------------------ |
| v7               | 3.4 Deploy Automated Operating System Patch Management Tools |
| v7               | 3.5 Deploy Automated Software Patch Management Tools         |

## Assessment Status

Manual