# Cis Ubuntu2004 V300 1 2 1 2

> Ensure package manager repositories are configured

- Skill: `cyberstrikeus/cis-ubuntu2004-v300-1-2-1-2` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu2004-v300-1-2-1-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu2004-v300-1-2-1-2/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-ubuntu2004-v300-1-2-1-2

---


# 1.2.1.2 Ensure package manager repositories are configured (Manual)

## Profile

- Level 1 - Server
- Level 1 - Workstation

## Description

Systems need to have package manager repositories configured to ensure they receive the latest patches and updates.

## Rationale

If a system's package repositories are misconfigured important patches may not be identified or a rogue repository could introduce compromised software.

## Audit Procedure

### Command Line

Run the following command and verify package repositories are configured correctly:

```bash
# apt-cache policy
```

## Expected Result

Package repositories should be configured according to site policy.

## Remediation

### Command Line

Configure your package manager repositories according to site policy.

## References

1. NIST SP 800-53 Rev. 5: SI-2

## CIS Controls

| Controls Version | Control                                                      | IG 1 | IG 2 | IG 3 |
| ---------------- | ------------------------------------------------------------ | ---- | ---- | ---- |
| v8               | 7.3 Perform Automated Operating System Patch Management      | \*   | \*   | \*   |
| v8               | 7.4 Perform Automated Application Patch Management           | \*   | \*   | \*   |
| v7               | 3.4 Deploy Automated Operating System Patch Management Tools | \*   | \*   | \*   |
| v7               | 3.5 Deploy Automated Software Patch Management Tools         | \*   | \*   | \*   |

MITRE ATT&CK Mappings: T1195, T1195.001 | TA0005 | M1051