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

Introducing the Linux system and network monitoring tools


In the final section of our chapter, we are going to present a number of very useful tools to monitor both systems and networks for our CentOS 7 server.

We will start by showing some system monitoring tools. We believe that most of these tools need the EPEL repository installed, so we can just install it before trying to install any of those tools:

$ sudo yum install epel-release

The first tool that we are going to talk about is Htop. It is kind of the same as the old top command, but it has a very user-friendly interface, wherein it is much more interactive with many shortcuts, a graphical colored presentation of the process, and the CPU, Memory, and SWAP Memory in a bar shaped way, to show how much of those are used. To install Htop, we just need to use Yum:

$ sudo yum install htop

And to run it, we simply need to type htop. There is no configuration needed:

$ htop

We should see this kind of interface:

The second system-monitoring...