Book Image

Mastering CentOS 7 Linux Server

By : Mohamed Alibi, BHASKARJYOTI ROY
Book Image

Mastering CentOS 7 Linux Server

By: Mohamed Alibi, BHASKARJYOTI ROY

Overview of this book

Most server infrastructures are equipped with at least one Linux server that provides many essential services, both for a user's demands and for the infrastructure itself. Setting up a sustainable Linux server is one of the most demanding tasks for a system administrator to perform. However, learning multiple, new technologies to meet all of their needs is time-consuming. CentOS 7 is the brand new version of the CentOS Linux system under the RPM (Red Hat) family. It is one of the most widely-used operating systems, being the choice of many organizations across the world. With the help of this book, you will explore the best practices and administration tools of CentOS 7 Linux server along with implementing some of the most common Linux services. We start by explaining the initial steps you need to carry out after installing CentOS 7 by briefly explaining the concepts related to users, groups, and right management, along with some basic system security measures. Next, you will be introduced to the most commonly used services and shown in detail how to implement and deploy them so they can be used by internal or external users. Soon enough, you will be shown how to monitor the server. We will then move on to master the virtualization and cloud computing techniques. Finally, the book wraps up by explaining configuration management and some security tweaks. All these topics and more are covered in this comprehensive guide, which briefly demonstrates the latest changes to all of the services and tools with the recent shift from CentOS 6 to CentOS 7.
Table of Contents (16 chapters)
Mastering CentOS 7 Linux Server
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Chapter 4. Mail Server with Postfix

Nowadays, many people are already using configured and reliable web-based mail services such as Gmail, Yahoo, and so on. Most of those people are questioning the need for a local e-mail server installed inside their server environment. Well, servers also need to send e-mails, not only humans; and it is useful for many other needs, especially when notifying an administrator if a server is in a critical state.

Postfix is a high-performance open source Mail Transfer Agent (MTA) for Linux systems. It is fast, easy to administrate, and secure. It helps to route and deliver electronic mail. Postfix supports encryption and virtual domains, and its configuration files are clear, and easy to understand, and edit.

The installation of Postfix will be divided into multiple sections. Since this chapter is all about setting up an e-mail server using Postfix and adding some tools to make it fully qualified and then securing it, we will do the installation step by step...