Ubuntu Security Audit: Step-by-Step Guide

To audit and strengthen system security in Ubuntu, you can achieve this by following these steps:

1. Audit system security:
2. Scan the system using vulnerability scanning tools such as OpenVAS, Nessus, etc., to detect vulnerabilities and security risks in the system.
3. Use system auditing tools such as Lynis and chkrootkit to check the security and integrity of the system.
4. Regularly review the system log files to check for any abnormal activities or potential security threats within the system.
5. Reinforcement system:
6. Install system updates and patches in a timely manner to ensure that the software and services in the system are up to date, in order to fix known security vulnerabilities.
7. Disable unnecessary services and ports to reduce the system’s vulnerability to attacks.
8. Set up firewall rules to restrict access to the system.
9. Install and configure intrusion detection systems (IDS) and intrusion prevention systems (IPS) to monitor for any abnormal activity in the system and respond promptly.
10. Enhance system access security by using strong passwords and multi-factor authentication.
11. Implementing Access Control Lists (ACL) and file permissions to limit users’ access to system files and directories.
12. Encrypt sensitive data and communications to ensure the security of data during transmission and storage.

By implementing the above measures, it is possible to effectively audit system security and strengthen the system, thereby improving its security and stability.