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

Setting up the Clamav antivirus


Clamav is an open source antivirus tool. Its basic usage is for detecting viruses, malware, and malicious software on Linux-based machines.

To install Clamav, we need to install the EPEL repository:

$ sudo yum install epel-release

Then we can install Clamav with all its useful tools:

$ sudo yum install clamav-server clamav-data clamav-update clamav-filesystem clamav clamav-scanner-systemd clamav-devel clamav-lib clamav-server-systemd

Before we start configuring, we need to make sure that SELinux will let Clamav work without issues:

$ sudo setsebool -P antivirus_can_scan_system 1

To check whether the option is active, we need to type this:

$ sudo getseboot –a | grep virus

Then we remove the example configuration, so we can make our own configuration:

$ sudo sed -i '/^Example/d' /etc/clamd.d/scan.conf

After removing the example lines, we need to do some modifications to define the TCP server type and to define the user root to execute the antivirus:

$ sudo nano...