Book Image

CentOS Quick Start Guide

By : Shiwang Kalkhanda
Book Image

CentOS Quick Start Guide

By: Shiwang Kalkhanda

Overview of this book

Linux kernel development has been the worlds largest collaborative project to date. With this practical guide, you will learn Linux through one of its most popular and stable distributions. This book will introduce you to essential Linux skills using CentOS 7. It describes how a Linux system is organized, and will introduce you to key command-line concepts you can practice on your own. It will guide you in performing basic system administration tasks and day-to-day operations in a Linux environment. You will learn core system administration skills for managing a system running CentOS 7 or a similar operating system, such as RHEL 7, Scientific Linux, and Oracle Linux. You will be able to perform installation, establish network connectivity and user and process management, modify file permissions, manage text files using the command line, and implement basic security administration after covering this book. By the end of this book, you will have a solid understanding of working with Linux using the command line.
Table of Contents (11 chapters)

Accessing remote logins with SSH

SSH is an OpenSSH client program used for securely logging in to a remote machine for remote administration. It provides an authenticated encrypted communication channel between two hosts over an untrusted network.

Understanding OpenSSH

The SSH component can be categorized into two parts. The first is OpenSSH server (sshd service) which is installed and run on a remote server to accept connections from OpenSSH Client. By default, it runs on port 22 using TCP protocol, which should be allowed by firewalls to accept OpenSSH client connections.

The second component is SSH Client, which should be installed on any client system (Linux, Windows, or macOS) from which you want to connect to the system...