Chapter 1: What is SSH, Why It Matters, and How It Works
In this first chapter, you will learn what SSH is, why it was created, and why it is an important tool for Linux administrators and DevOps engineers who manage remote servers.
As a Linux administrator or a DevOps engineer, managing remote servers is part of your daily routine.
Unlike your local machine, these servers are sitting in data centers somewhere, and you will never have direct physical access to them.
Because of this, you need a reliable and secure way to connect to those machines, manage them, and run commands remotely
This is exactly the problem that Secure Shell or SSH is designed to solve.
What Is SSH
SSH, which stands for Secure Shell, is a cryptographic network protocol that allows you to securely connect to a remote machine over an unsecured network like the internet.
It creates a fully encrypted tunnel between your machine and the remote server, meaning all the data that travels between both sides is protected and cannot be intercepted or read by anyone in between.
It is important to understand that SSH is not just a remote login tool, but it is a complete secure communication protocol that handles authentication, encryption, and data integrity all at once.
