Book Image

Ubuntu Server Essentials

By : Abdelmonam Kouka
Book Image

Ubuntu Server Essentials

By: Abdelmonam Kouka

Overview of this book

Ubuntu is a Debian-based Linux operating system built on top of the Debian architecture. It is used to make operating systems for multiple platforms, including phones, desktops, TVs and mobiles. It has made some serious progress in the realms of efficiency and user friendliness. With evolving technology trends, demands on software have changed, with more and more skilled users. Over the past few years, services such as Facebook, Twitter, and push notifications on smartphones mean that users are used to being up to date with everything that happens all the time. With SignalR, the applications stay connected and will generate notifications when something happens either from the system or by other users. This provides new opportunities for the system administrators, to enter this new and exciting world of real-time application development. This is a concise and a cost-friendly guide, packed with up-to-date essentials on Ubuntu Server fundamentals. It will guide you through deploying and configuring Ubuntu servers in your office environments. You’ll start by installing Ubuntu Server, then move to the most useful aspect —the command-line interface inside it. You’ll extend your knowledge by learning how to administrate and configure Ubuntu Server. You will also see how to deploy services on Ubuntu Server and find out how to secure it. You’ll get to grips with the virtualization and cloud computing facilities provided by Ubuntu, and finally, you’ll gain some very useful tips.
Table of Contents (13 chapters)

Deploying an OpenSSH server

Let's start with the most useful server that, according to me, every administrator should install on their server, irrespective of the aim of this server and the services that need to be put on it. It is the OpenSSH server that allows you to remotely connect in a secure way to a server from a computer that can reach this server. The OpenSSH server is a set of tools that allow, besides the secure remote connection, a secure file transfer with the help of the scp protocol.

The OpenSSH server allows clients to connect using many authentication methods, such as a plain password, a public key, and kerberos tickets.

Installing the OpenSSH server

We can install only the OpenSSH server, but in general, we need both the OpenSSH tools—a server and a client. We need a server to connect to the Ubuntu Server that we are working on from a reachable computer. We require a client to connect it to another server or computer.

Installing OpenSSH (the server and client) is quite easy...