Chapter 1
System Management
Course: Comptia Linux Xk0 006
Subject: Comptia Linux Xk0 006
Chapter: Security
Security best practices in Linux aim to protect system integrity, ensure confidentiality of data, and authenticate users and services. These practices are critical in both server and client environments, especially when managing remote access (e.g., SSH), securing web traffic (e.g., HTTPS), and ensuring trust between systems.
Key goals include:
- Preventing unauthorized access
- Protecting data in transit and at rest
- Verifying the authenticity and integrity of data
- Ensuring system and user identity verification
- Reducing exposure to common attack vectors (e.g., man-in-the-middle, spoofing)
1. Public Key Infrastructure (PKI)
PKI is a system of managing encryption keys and digital certificates to establish trust relationships in a network. It is used for:
- Secure web communication (HTTPS/SSL)
- Email encryption (S/MIME)
- Code signing
- SSH authentication
- VPNs
- Internal TLS-based microservices communication