Book Image

Linux: Powerful Server Administration

By : Jonathan Hobson, William Leemans, Uday Sawant, Oliver Pelz
Book Image

Linux: Powerful Server Administration

By: Jonathan Hobson, William Leemans, Uday Sawant, Oliver Pelz

Overview of this book

Linux servers are frequently selected over other server operating systems for their stability, security and flexibility advantages.This Learning Path will teach you how to get up and running with three of the most popular Linux server distros: Ubuntu Server, CentOS 7 Server, and RHEL 7 Server. We will begin with the Ubuntu Server and show you how to make the most of Ubuntu’s advanced functionalities. Moving on, we will provide you with all the knowledge that will give you access to the inner workings of the latest CentOS version 7. Finally, touching RHEL 7, we will provide you with solutions to common RHEL 7 Server challenges.This Learning Path combines some of the best that Packt has to offer in one complete, curated package. It includes content from the following Packt products: 1)Ubuntu Server Cookbook 2)CentOS 7 Linux Server Cookbook, Second Edition 3)Red Hat Enterprise Linux Server Cookbook

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Linux: Powerful Server Administration
Jonathan Hobson | William Leemans | Uday Sawant | Oliver Pelz
Apr, 2017 | 16 hours 35 minutes
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Table of Contents (6 chapters)
Preface
Preface
What this learning path covers
What you need for this learning path
Who this learning path is for
Customer support
Free Chapter
1
1. Module 1
1. Module 1
1. Managing Users and Groups
2. Networking
3. Working with Web Servers
4. Working with Mail Servers
5. Handling Databases
6. Network Storage
7. Cloud Computing
8. Working with Containers
9. Streaming with Ampache
10. Communication Server with XMPP
11. Git Hosting
12. Collaboration Tools
13. Performance Monitoring
14. Centralized Authentication Service
2
2. Module 2
2. Module 2
1. Installing CentOS
2. Configuring the System
3. Managing the System
4. Managing Packages with YUM
5. Administering the Filesystem
6. Providing Security
7. Building a Network
8. Working with FTP
9. Working with Domains
10. Working with Databases
11. Providing Mail Services
12. Providing Web Services
13. Operating System-Level Virtualization
14. Working with SELinux
15. Monitoring IT Infrastructure
3
3. Module 3
3. Module 3
1. Working with KVM Guests
2. Deploying RHEL "En Masse"
3. Configuring Your Network
4. Configuring Your New System
5. Using SELinux
6. Orchestrating with Ansible
7. Puppet Configuration Management
8. Yum and Repositories
9. Securing RHEL 7
10. Monitoring and Performance Tuning
4
Bibliography
Bibliography
5
Index
Index

Chapter 11. Providing Mail Services

In this chapter, we will cover:

  • Configuring a domain-wide mail service with Postfix
  • Working with Postfix
  • Delivering the mail with Dovecot
  • Using Fetchmail

Introduction

This chapter is a collection of recipes that deliver the necessary steps to implement and maintain one of the oldest and most versatile technologies on the Internet today. Everyone wants to send and receive e-mails and this chapter provides the necessary starting point required to deploy such a service in a timely and efficient manner.

Configuring a domain-wide mail service with Postfix

Postfix is a Mail Transport Agent (MTA) responsible for the transfer of e-mails between mail servers using the SMTP protocol. Postfix is now the default MTA on CentOS 7. Here, as with most other critical network services, its default configuration allows outgoing but does not accept incoming network connections from any host other than the local one. This makes sense if all you need is a local Linux user...

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