Be a proficient Linux system administrator KEY FEATURES ● Discusses new features embedded in the newer version of RHEL. ● Provides you with a manual on various commands that a regular and admin user may use to perform his daily tasks. ● Provides comprehensive material to administer, manage, and secure the server. DESCRIPTION Today, Linux is used everywhere, which means the demand for Linux administrators is high. This book is organized to help readers develop the essential skills to become competent Linux administrators. This book provides extensive materials that will deliver beginners vast knowledge in the Linux domain. It begins with the fundamentals of Linux systems and moves ahead to discussing advanced topics. To help the readers gain competitive knowledge, RHEL9 is used throughout this book. This book helps the readers learn useful Linux commands to efficiently manage Linux servers. It also delivers extensive knowledge of shell scripting required to automate most of the regular admin-related tasks. Security of the data and the server as a whole is another important aspect that this book describes. Besides, this book also explains advanced topics such as cloud, web servers, performance tuning, etc., in a practical way that will truly be very helpful for beginners to start their professional career in this domain. Reading this book will serve as an indispensable step towards understanding the Linux core concepts. The materials delivered in this book will aid in making you proficient in handling, managing, and administering one or more RHEL servers. WHAT YOU WILL LEARN ● Successfully install and manage Linux on any machine. ● Understand Linux/Unix file organization and implement file security with the principle of least privilege. ● Master command line usage and practical applications of Linux commands. ● Gain expertise in disk management and partitioning on Linux systems. ● Learn networking fundamentals and implement secure networks among multiple machines. WHO THIS BOOK IS FOR This book is designed for system engineers, network engineers, junior Linux administrators, and Windows administrators who want to gain knowledge in managing RHEL on a daily basis. It also caters to the needs of Red Hat professionals who want to refresh their knowledge and get comfortable using RHEL 9. TABLE OF CONTENTS 1. The First Step to Linux 2. Linux Filesystem and Administration 3. Knowing Linux Commands 4. Managing Processes and Services in RedHat Linux 5. Handling and Managing Files 6. Managing Users and File Permissions 7. Interacting with Bash Shell and Scripting 8. Security and Networking in Linux 9. Partitioning in Linux 10. Containers 11. Cloud Computing 12. Graphical User Interface 13. Software Updates and Patch Management 14. Package Installation 15. Performance Monitoring and Tuning 16. Backup and Troubleshooting in Linux 17. Web Server and Database Server Setup in Linux 18. Miscellaneous

Arguably one of the most highly regarded and widely used enterprise-level operating systems available today is the Red Hat Enterprise Linux (typically shortened to RHEL and pronounced rell) distribution. Not only is it considered to be among the most stable and reliable operating systems, it is also backed by the considerable resources and technical skills of Red Hat, Inc. Red Hat Enterprise Linux 9 Essentials is designed to provide detailed information on the installation, use, and administration of the Red Hat Enterprise Linux 9 distribution. For beginners, the book covers topics such as operating system installation, the basics of the GNOME desktop environment, configuring email and web servers, and installing packages and system updates using App Streams. Additional installation topics, such as dual booting with Microsoft Windows, are also covered, together with all important security topics, such as configuring a firewall and user and group administration. For the experienced user, topics such as remote desktop access, the Cockpit web interface, logical volume management (LVM), disk partitioning, swap management, KVM virtualization, Secure Shell (SSH), Linux Containers, and file sharing using both Samba and NFS are covered in detail to provide a thorough overview of this enterprise class operating system.

What is this book about? Red Hat Linux 9 is a powerful, flexible open source operating system. Its popularity is growing, both in home use and in corporate environments of all sizes. Its user interface makes it every bit as accessible as other operating systems, and its open source pedigree opens the doors to a mind-blowing amount of free software. This book guides you through that difficult time that comes just after you've installed a new operating system, by giving you the confidence to open your wings and fly with it. We'll take you through the installation, we'll get you working, and by the end of the book you'll have a well-configured, stable, secure operating system and a world of possibilities. What does this book cover? In this book, you will learn how to Install Red Hat Linux 9 using the included 2 CD-ROM distribution from Red Hat Use Red Hat Linux 9 to connect to networks, printers, and the Internet Get working — using Office applications, Web browsers, multimedia applications, and so on Get the most from Linux — by understanding Linux's powerful file system and command line interfaces Set up and configure a Web server, a mail server, a file server, and various other types of servers Secure your machine against unauthorized use — both from the Internet and from internal threats Modify your machine to suit the way you work — installing software to create a tailored working environment Who is this book for? This book is for you if you're using (or planning to use) the Red Hat Linux operating system for the first time. It offers the simple, plain-speaking guidance you need as you begin to explore the vast potential of open source software. The book assumes that you're familiar with using Microsoft Windows, and aims to help you make the jump from Windows to Linux by introducing it in those terms. No previous knowledge of Linux is assumed.

HIGHLIGHTS: > Covers Red Hat Enterprise Linux 9 > Covers ALL Latest Official Exam Objectives > Great for Self-Study and In-Class/Virtual Training > 22 Chapters > 99 Real-Life Step-By-Step Exercises and Shell Scripts > 74 Do-It-Yourself Challenge Labs > 381 Review Questions & Answers > 4 Sample RHCSA Exams (4 x 22 tasks per exam) RHCSA Red Hat Enterprise Linux 9: Training and Exam Preparation Guide, Third Edition provides an in-depth coverage of the latest RHCSA (version 9) EX200 exam objectives. The most definitive guide available on the subject, this book explains concepts, analyzes configuration files, describes command outputs, shows step-by-step procedures (includes screenshots of actual commands executed and outputs they produced), and challenges the readers' comprehension of the concepts and procedures by presenting plenty of supplementary labs and sample realistic exam tasks to perform on their own. This book has 22 chapters that are organized logically, from building a lab environment to the fundamentals of Linux to sophisticated Linux administration topics. The book covers the topics on local RHEL 9 installation; initial interaction with the system; essential Linux commands; file compression and archiving; file editing and manipulation; standard and special permissions; file searching and access controls; user monitoring and authentication files; users, groups, and password aging; bash shell features and startup files; processes and job scheduling; basic and advanced software administration techniques; system boot process and bootloader; kernel management and system initialization; logging and system tuning; basic and advanced storage management tools and solutions; local file systems and swap regions; network device and connection configuration; hostname resolution and time synchronization; remote file systems and automounting; the secure shell service; firewall and SELinux controls; bash shell scripting; and operating system virtualization using containers. Each chapter highlights the major topics and relevant exam objectives at the beginning and ends with several review questions & answers and Do-It-Yourself challenge labs. Throughout the book, figures, tables, screenshots, examples, warnings, notes, and exam tips are furnished to support explanation and exam preparation. There are four sample RHCSA exams that are expected to be performed using the knowledge and skills attained from reading the material, following the in-chapter exercises, and completing the end-of-chapter challenge labs. The labs and the sample exams include hints to relevant topics and/or exercises. This book may be used as a self-learning guide by RHCSA 9 exam aspirants, a resource by instructors and students to follow in physical and virtual training sessions, an on-the-job resource for reference, and an easy-to-understand guide by novice and non-RHEL administrators.

Develop the skills required to administer your RHEL environment on-premises and in the cloud while preparing for the RHCSA exam Purchase of the print or Kindle book includes a free eBook in PDF format Key Features Become a pro at system administration from installation to container management Secure and harden your Linux environment using SSH, SELinux, firewall, and system permissions Gain confidence to pass the RHCSA exam with the help of practice tests Book DescriptionWith Red Hat Enterprise Linux 9 becoming the standard for enterprise Linux used from data centers to the cloud, Linux administration skills are in high demand. With this book, you’ll learn how to deploy, access, tweak, and improve enterprise services on any system on any cloud running Red Hat Enterprise Linux 9. Throughout the book, you’ll get to grips with essential tasks such as configuring and maintaining systems, including software installation, updates, and core services. You’ll also understand how to configure the local storage using partitions and logical volumes, as well as assign and deduplicate storage. You’ll learn how to deploy systems while also making them secure and reliable. This book provides a base for users who plan to become full-time Linux system administrators by presenting key command-line concepts and enterprise-level tools, along with essential tools for handling files, directories, command-line environments, and documentation for creating simple shell scripts or running commands. With the help of command line examples and practical tips, you’ll learn by doing and save yourself a lot of time. By the end of the book, you’ll have gained the confidence to manage the filesystem, users, storage, network connectivity, security, and software in RHEL 9 systems on any footprint.What you will learn Become well versed with the fundamentals of RHEL9—from system deployment to user management Secure a system by using SELinux policies and configuring firewall rules Understand LVM to manage volumes and maintain VDO deduplication Manage a system remotely using SSH and public key authentication Get the hang of the boot process and kernel tunable to adjust your systems Automate simple tasks using scripts or Ansible Playbooks Who this book is for This book is for Red Hat Enterprise Linux system administrators and Linux system administrators. It's also a good resource for any IT professional who wants to learn system administration. RHCSA certification candidates will find this book useful in their preparation for the certification exam.

Save time managing Containers, Kubernetes and OpenShift with Ansible automation technology with some real-life examples. Every successful IT department needs automation nowadays for bare metal servers, virtual machines, could, containers, and edge computing. Automate your IT journey with Ansible automation technology. I'm going to teach you example by example how to accomplish the most common Containers, Kubernetes, OpenShift and System Administrator tasks. You are going to start with the installation of Ansible in RedHat Enterprise Linux, Ubuntu, and macOS using the most command package manager and archives. Each of the 10+ lessons summarizes a module: from the most important parameter to some demo of code and real-life usage. Each code is battle proved in the real life. Console interaction and verification are included in every video. You are going to save tons of time automating the container management automating with some lines of code and these are only some of the long lists included in the course. Simplify your system administrator journey with Docker, podman, Kubernetes and OpenShift tools. These are technologies very requested in the market nowadays. Are you ready to automate your day with Ansible?

Your Complete Guide to the World's Leading Linux Enterprise Distribution Red Hat Enterprise Linux 3 is emerging as the corporate Linux standard. One of the first books to focus on this robust product, Mastering Red Hat Enterprise Linux 3 gives you the practical information you need to install, configure, and network Linux on a large number of computers. For experienced administrators, this book uniquely features detailed coverage of Apache, TUX, Samba, NFS, vsFTP, Squid, SSH, DNS, DHCP, iptables, CUPS, sendmail, Postfix, NIS, LDAP, MySQL, system administration command line and GUI tools and utilities for each phase of the management process. It also helps you configure the GUI for enterprise workstations. Topics include: Installing Linux on a standalone system, over a network, and automatically on multiple computers Navigating the command line interface Administering users and groups securely Managing packages with the RPM GUI tool Configuring and troubleshooting the boot process Upgrading and recompiling kernels Backing up your system with RAID Understanding basic TCP/IP networking Managing Linux on your LAN Securing Linux firewalls Ensuring secure remote access Installing, configuring, and testing DNS, DHCP, CUPS, sendmail and Postfix mail servers Configuring and troubleshooting FTP, NFS, Samba, Apache, TUX, and Squid Effectively using Linux authentication services--NIS and LDAP Using Red Hat GUI administrative tools appropriately Setting up MySQL for databases Managing X servers and X clients Working with GNOME and KDE

Ansible is an Open Source IT automation tool. This book contains all of the obvious and not-so-obvious best practices of Ansible automation. Every successful IT department needs automation nowadays for bare metal servers, virtual machines, could, containers, and edge computing. Automate your IT journey with Ansible automation technology. You are going to start with basic concepts and the installation of Ansible in Enterprise Linux and Community Linux using the most command package manager and archives. Each of the 40+ lessons summarizes a specific scenario about files and directories management: creating an empty file, creating a text file, assigning permission to users and groups, renaming files and directory, removing the files and directory, or copying between local and remote and vice-versa. Another useful administrator tool is to assign permission to files or directories as needed. Included extraction of a compressed zip file or tarball with the most common gzips and bzip2 UNIX formats. Moreover, that is a lesson about file download from a URL and verifying the genuinity with the checksum. Are you ready to automate your day with Ansible? Examples in the book are tested with the latest version of Ansible 2.9+ and Ansible Core 2.11+.

Most organizations are aware of the risks threatening their IT environment. Viruses, trojans, worms, exploits and many other threats represent a serious danger for the IT department. A collapse of the IT system could mean grave financial losses right up to insolvency for a company. The IT departments of companies are conscious of this problem. Getting the best protection against these threats is the only issue. A simple file antivirus solution alone is totally inade-quate, as there are too many threats from contaminated e-mails, exploits etc. What is re-quired is a comprehensive suite that provides protection against all of these. Functional Diversity Because of the immense functional diversity of various antivirus suites and corporate prod-ucts, it is becoming increasingly difficult for decision-makers in the IT sector to get a proper overview. Which product should one opt for and for which areas of protection? During these tests our main focus has not been on malware detection rates, but on the prod-ucts' handling and user-friendliness, and the scope of functionality. We have compiled the functional scope of various products in a detailed table. For malware detection rates of indi-vidual products please refer to the tests of our website: http: //www.av-comparatives.org

Ansible is an Open Source IT automation tool. This book contains all of the obvious and not-so-obvious best practices of Ansible automation. Every successful IT department needs automation nowadays for bare metal servers, virtual machines, could, containers, and edge computing. Automate your IT journey with Ansible automation technology. You are going to start with the installation of Ansible in Enterprise Linux, Community Linux, Windows, and macOS using the most command package manager and archives. Each of the 200+ lessons summarizes a module: from the most important parameter to some Ansible code and real-life usage. Each code is battle proved in the real life. Simplifying mundane activities like creating a text file, extracting and archiving, fetching a repository using HTTPS or SSH connections could be automated with some lines of code and these are only some of the long lists included in the course. There are some Ansible codes usable in all the Linux systems, some specific for RedHat-like, Debian-like, and Windows systems. The 20+ Ansible troubleshooting lesson teaches you how to read the error message, how to reproduce, and the process of troubleshooting and resolution. Are you ready to automate your day with Ansible? Examples in the book are tested with the latest version of Ansible 2.9+ and Ansible Core 2.11+.