Chapter 1
System Management
Course: Comptia Linux Xk0 006
Subject: Comptia Linux Xk0 006
Chapter: Security
Remote system management is an essential part of Linux administration. It involves securely connecting to, administering, and managing systems over the network using tools like SSH, privilege delegation tools, and port tunneling.
1. SSH (Secure Shell)
SSH is a cryptographic network protocol used to securely access and manage Linux systems over untrusted networks. It replaces insecure protocols like Telnet and rlogin and supports features such as:
- Password and key-based authentication
- Remote command execution
- File transfers (via SCP, SFTP)
- Encrypted tunnels (port forwarding)
- X11 forwarding for remote GUI apps
SSH uses public-key cryptography to authenticate users and symmetric encryption to secure session data.
1. Configuration Files
SSH behavior is controlled by a set of configuration files on both the client and server sides. These determine how connections are established, authenticated, and managed.