Donald A. Tevault – författare

Master Linux Shells – Your Complete Guide to Practical Success with Bash, Zsh, PowerShellKey FeaturesDevelop portable scripts using Bash, Zsh, and PowerShell that work seamlessly across Linux, macOS, and Unix systemsProgress seamlessly through chapters with clear concepts, practical examples, and hands-on labs for skill developmentBuild real-world Linux administration scripts, enhancing your troubleshooting and management skillsBook DescriptionDive into the world of Linux shell scripting with this hands-on guide. If you’re comfortable using the command line on Unix or Linux but haven’t fully explored Bash, this book is for you. It’s designed for programmers familiar with languages like Python, JavaScript, or PHP who want to make the most of shell scripting.This isn’t just another theory-heavy book—you’ll learn by doing. Each chapter builds on the last, taking you from shell basics to writing practical scripts that solve real-world problems. With nearly a hundred interactive labs, you’ll gain hands-on experience in automation, system administration, and troubleshooting.While Bash is the primary focus, you'll also get a look at Z Shell and PowerShell, expanding your skills and adaptability. From mastering command redirection and pipelines to writing scripts that work across different Unix-like systems, this book equips you for real-world Linux challenges.By the end, you'll be equipped to write efficient shell scripts that streamline your workflow and improve system automation.What you will learnGrasp the concept of shells and explore their diverse types for varied system interactionsMaster redirection, pipes, and compound commands for efficient shell operationsLeverage text stream filters within scripts for dynamic data manipulationHarness functions and build libraries to create modular and reusable shell scriptsExplore the basic programming constructs that apply to all programming languagesEngineer portable shell scripts, ensuring compatibility across diverse platforms beyond LinuxWho this book is forThis book is for programmers who use the command line on Unix and Linux servers already, but don't write primarily in Bash. This book is ideal for programmers who've been using a scripting language such as Python, JavaScript or PHP, and would like to understand and use Bash more effectively. It’s also great for beginning programmers, who want to learn programming concepts.

A comprehensive guide to mastering the art of preventing your Linux system from getting compromised.

Key Features

Leverage this guide to confidently deliver a system that reduces the risk of being hackedPerform a number of advanced Linux security techniques such as network service detection, user authentication, controlling special permissions, encrypting file systems, and much moreMaster the art of securing a Linux environment with this end-to-end practical guide

Book Description

This book has extensive coverage of techniques that will help prevent attackers from breaching your system, by building a much more secure Linux environment. You will learn various security techniques such as SSH hardening, network service detection, setting up firewalls, encrypting file systems, protecting user accounts, authentication processes, and so on. Moving forward, you will also develop hands-on skills with advanced Linux permissions, access control, special modes, and more. Lastly, this book will also cover best practices and troubleshooting techniques to get your work done efficiently.By the end of this book, you will be confident in delivering a system that will be much harder to compromise.

What you will learn

Use various techniques to prevent intruders from accessing sensitive dataPrevent intruders from planting malware, and detect whether malware has been plantedPrevent insiders from accessing data that they aren’t authorized to accessDo quick checks to see whether a computer is running network services that it doesn’t need to runLearn security techniques that are common to all Linux distros, and some that are distro-specific

Who this book is for

If you are a systems administrator or a network engineer interested in making your Linux environment more secure, then this book is for you. Security consultants wanting to enhance their Linux security skills will also benefit from this book. Prior knowledge of Linux is mandatory.

A comprehensive guide for teaching system administrators, developers, and security professionals how to create their own systemd units and maintain system securityKey FeaturesMaintain and troubleshoot systemd services with easeLearn to create, modify, and reload service files and use systemd utilitiesUse cgroups to control resource usage and enhance securityBook DescriptionLinux Service Management Made Easy with systemd will provide you with an in-depth understanding of systemd, so that you can set up your servers securely and efficiently.This is a comprehensive guide for Linux administrators that will help you get the best of systemd, starting with an explanation of the fundamentals of systemd management.You’ll also learn how to edit and create your own systemd units, which will be particularly helpful if you need to create custom services or timers and add features or security to an existing service.Next, you'll find out how to analyze and fix boot-up challenges and set system parameters. An overview of cgroups that'll help you control system resource usage for both processes and users will also be covered, alongside a practical demonstration on how cgroups are structured, spotting the differences between cgroups Version 1 and 2, and how to set resource limits on both.Finally, you'll learn about the systemd way of performing time-keeping, networking, logging, and login management. You'll discover how to configure servers accurately and gather system information to analyze system security and performance.By the end of this Linux book, you’ll be able to efficiently manage all aspects of a server running the systemd init system. What you will learnUse basic systemd utilities to manage a systemCreate and edit your own systemd unitsCreate services for Podman-Docker containersEnhance system security by adding security-related parametersFind important information with journaldAnalyze boot-up problemsConfigure system settings with systemd utilitiesWho this book is forThis book is best suited for Linux administrators who want to learn more about maintaining and troubleshooting Linux servers. It will also be useful for aspiring administrators studying for a Linux certification exam, developers looking to learn how to create systemd unit files, and security administrators who want to understand the security settings that can be used in systemd units and how to control resource usage with cgroups. Before you dive into this book, you’ll need a solid working knowledge of basic Linux commands.

A comprehensive guide for teaching system administrators, developers, and security professionals how to create their own systemd units and maintain system security

Key Features

Maintain and troubleshoot systemd services with easeLearn to create, modify, and reload service files and use systemd utilitiesUse cgroups to control resource usage and enhance security

Book Description

Linux Service Management Made Easy with systemd will provide you with an in-depth understanding of systemd, so that you can set up your servers securely and efficiently.This is a comprehensive guide for Linux administrators that will help you get the best of systemd, starting with an explanation of the fundamentals of systemd management.You’ll also learn how to edit and create your own systemd units, which will be particularly helpful if you need to create custom services or timers and add features or security to an existing service.Next, you''ll find out how to analyze and fix boot-up challenges and set system parameters. An overview of cgroups that''ll help you control system resource usage for both processes and users will also be covered, alongside a practical demonstration on how cgroups are structured, spotting the differences between cgroups Version 1 and 2, and how to set resource limits on both.Finally, you''ll learn about the systemd way of performing time-keeping, networking, logging, and login management. You''ll discover how to configure servers accurately and gather system information to analyze system security and performance.By the end of this Linux book, you’ll be able to efficiently manage all aspects of a server running the systemd init system.

What you will learn

Use basic systemd utilities to manage a systemCreate and edit your own systemd unitsCreate services for Podman-Docker containersEnhance system security by adding security-related parametersFind important information with journaldAnalyze boot-up problemsConfigure system settings with systemd utilities

Who this book is for

This book is best suited for Linux administrators who want to learn more about maintaining and troubleshooting Linux servers. It will also be useful for aspiring administrators studying for a Linux certification exam, developers looking to learn how to create systemd unit files, and security administrators who want to understand the security settings that can be used in systemd units and how to control resource usage with cgroups. Before you dive into this book, you’ll need a solid working knowledge of basic Linux commands.

Take your ethical hacking skills to the next level by mastering bash script and building your own hacking tools.Key FeaturesAutomate reconnaissance, exploitation, and post-exploitation workflows using bash scripting for ethical hackingBuild custom Linux command-line tools for penetration testing, log analysis, and network scriptingApply secure coding best practices to develop modular, maintainable hacking utilitiesBook DescriptionLinux shell scripting is a foundational skill for ethical hackers and penetration testers who want to automate repetitive tasks and build powerful command-line tools. This practical guide shows you how to use bash scripting for cybersecurity automation, helping you streamline reconnaissance, exploitation, and post-exploitation workflows on Linux systems.You’ll progress from advanced bash techniques to real-world penetration testing applications, learning how to automate reconnaissance processes, parse logs, extract indicators, and develop custom exploitation utilities. Using tools such as awk, sed, grep, and regular expressions, you’ll manipulate data efficiently and craft scripts that solve real security challenges.A dedicated section on network scripting demonstrates how to build scripts that interact with remote systems, perform scanning tasks, and gather actionable information. You’ll also explore system hardening automation and learn best practices for writing secure, modular, and maintainable shell scripts.By the end of this book, you’ll have the confidence to integrate Linux shell scripting into your ethical hacking toolkit, scale your penetration testing workflow, and build reusable security tools tailored to real-world cybersecurity scenarios.What you will learnDevelop scripts and tools tailored for ethical hacking and penetration testingLeverage powerful tools such as awk, sed, and grep for data manipulation and log parsingDesign scripts for system hardeningIntegrate scripting into your cybersecurity workflows for maximum efficiencyDiscover best practices for writing secure, maintainable, and modular scriptsApply scripting knowledge through real-world case studies and hands-on exercisesWho this book is forIf you’re a cybersecurity enthusiast or ethical hacker who wants to learn more about building hacking tools, this book is for you. A basic understanding of ethical hacking, GNU/Linux, and bash scripting concepts will be helpful to get the most out of this book. The book is also ideal for seasoned pentesters and sysadmins looking to optimize operations.

Master Linux Shells – Your Complete Guide to Practical Success with Bash, Zsh, PowerShell

Key Features

Develop portable scripts using Bash, Zsh, and PowerShell that work seamlessly across Linux, macOS, and Unix systemsProgress seamlessly through chapters with clear concepts, practical examples, and hands-on labs for skill developmentBuild real-world Linux administration scripts, enhancing your troubleshooting and management skills

Book Description

Dive into the world of Linux shell scripting with this hands-on guide. If you’re comfortable using the command line on Unix or Linux but haven’t fully explored Bash, this book is for you. It’s designed for programmers familiar with languages like Python, JavaScript, or PHP who want to make the most of shell scripting.This isn’t just another theory-heavy book—you’ll learn by doing. Each chapter builds on the last, taking you from shell basics to writing practical scripts that solve real-world problems. With nearly a hundred interactive labs, you’ll gain hands-on experience in automation, system administration, and troubleshooting.While Bash is the primary focus, you''ll also get a look at Z Shell and PowerShell, expanding your skills and adaptability. From mastering command redirection and pipelines to writing scripts that work across different Unix-like systems, this book equips you for real-world Linux challenges.By the end, you''ll be equipped to write efficient shell scripts that streamline your workflow and improve system automation.

What you will learn

Grasp the concept of shells and explore their diverse types for varied system interactionsMaster redirection, pipes, and compound commands for efficient shell operationsLeverage text stream filters within scripts for dynamic data manipulationHarness functions and build libraries to create modular and reusable shell scriptsExplore the basic programming constructs that apply to all programming languagesEngineer portable shell scripts, ensuring compatibility across diverse platforms beyond Linux

Who this book is for

This book is for programmers who use the command line on Unix and Linux servers already, but don''t write primarily in Bash. This book is ideal for programmers who''ve been using a scripting language such as Python, JavaScript or PHP, and would like to understand and use Bash more effectively. It’s also great for beginning programmers, who want to learn programming concepts.

Gain a firm practical understanding of how to secure your Linux system from intruders, malware attacks, and other cyber threatsGet With Your Book: PDF Copy, AI Assistant, and Next-Gen Reader FreeKey FeaturesDiscover security techniques to prevent malware from infecting a Linux system, and detect itPrevent unauthorized people from breaking into a Linux systemProtect important and sensitive data from being revealed to unauthorized personsBook DescriptionThe third edition of Mastering Linux Security and Hardening is an updated, comprehensive introduction to implementing the latest Linux security measures, using the latest versions of Ubuntu and AlmaLinux.In this new edition, you will learn how to set up a practice lab, create user accounts with appropriate privilege levels, protect sensitive data with permissions settings and encryption, and configure a firewall with the newest firewall technologies. You’ll also explore how to use sudo to set up administrative accounts with only the privileges required to do a specific job, and you’ll get a peek at the new sudo features that have been added over the past couple of years. You’ll also see updated information on how to set up a local certificate authority for both Ubuntu and AlmaLinux, as well as how to automate system auditing. Other important skills that you’ll learn include how to automatically harden systems with OpenSCAP, audit systems with auditd, harden the Linux kernel configuration, protect your systems from malware, and perform vulnerability scans of your systems. As a bonus, you’ll see how to use Security Onion to set up an Intrusion Detection System.By the end of this new edition, you will confidently be able to set up a Linux server that will be secure and harder for malicious actors to compromise.What you will learnPrevent malicious actors from compromising a production Linux systemLeverage additional features and capabilities of Linux in this new versionUse locked-down home directories and strong passwords to create user accountsPrevent unauthorized people from breaking into a Linux systemConfigure file and directory permissions to protect sensitive dataHarden the Secure Shell service in order to prevent break-ins and data lossApply security templates and set up auditingWho this book is forThis book is for Linux administrators, system administrators, and network engineers interested in securing moderate to complex Linux environments. Security consultants looking to enhance their Linux security skills will also find this book useful. Working experience with the Linux command line and package management is necessary to understand the concepts covered in this book.

Gain a firm practical understanding of how to secure your Linux system from intruders, malware attacks, and other cyber threatsPurchase of the print or Kindle book includes a free eBook in PDF format.

Key Features

Discover security techniques to prevent malware from infecting a Linux system, and detect itPrevent unauthorized people from breaking into a Linux systemProtect important and sensitive data from being revealed to unauthorized persons

Book Description

The third edition of Mastering Linux Security and Hardening is an updated, comprehensive introduction to implementing the latest Linux security measures, using the latest versions of Ubuntu and AlmaLinux.In this new edition, you will learn how to set up a practice lab, create user accounts with appropriate privilege levels, protect sensitive data with permissions settings and encryption, and configure a firewall with the newest firewall technologies. You’ll also explore how to use sudo to set up administrative accounts with only the privileges required to do a specific job, and you’ll get a peek at the new sudo features that have been added over the past couple of years. You’ll also see updated information on how to set up a local certificate authority for both Ubuntu and AlmaLinux, as well as how to automate system auditing. Other important skills that you’ll learn include how to automatically harden systems with OpenSCAP, audit systems with auditd, harden the Linux kernel configuration, protect your systems from malware, and perform vulnerability scans of your systems. As a bonus, you’ll see how to use Security Onion to set up an Intrusion Detection System.By the end of this new edition, you will confidently be able to set up a Linux server that will be secure and harder for malicious actors to compromise.

What you will learn

Prevent malicious actors from compromising a production Linux systemLeverage additional features and capabilities of Linux in this new versionUse locked-down home directories and strong passwords to create user accountsPrevent unauthorized people from breaking into a Linux systemConfigure file and directory permissions to protect sensitive dataHarden the Secure Shell service in order to prevent break-ins and data lossApply security templates and set up auditing

Who this book is for

This book is for Linux administrators, system administrators, and network engineers interested in securing moderate to complex Linux environments. Security consultants looking to enhance their Linux security skills will also find this book useful. Working experience with the Linux command line and package management is necessary to understand the concepts covered in this book.

A comprehensive guide to securing your Linux system against cyberattacks and intrudersKey FeaturesDeliver a system that reduces the risk of being hackedExplore a variety of advanced Linux security techniques with the help of hands-on labsMaster the art of securing a Linux environment with this end-to-end practical guideBook DescriptionFrom creating networks and servers to automating the entire working environment, Linux has been extremely popular with system administrators for the last couple of decades. However, security has always been a major concern. With limited resources available in the Linux security domain, this book will be an invaluable guide in helping you get your Linux systems properly secured.Complete with in-depth explanations of essential concepts, practical examples, and self-assessment questions, this book begins by helping you set up a practice lab environment and takes you through the core functionalities of securing Linux. You'll practice various Linux hardening techniques and advance to setting up a locked-down Linux server. As you progress, you will also learn how to create user accounts with appropriate privilege levels, protect sensitive data by setting permissions and encryption, and configure a firewall. The book will help you set up mandatory access control, system auditing, security profiles, and kernel hardening, and finally cover best practices and troubleshooting techniques to secure your Linux environment efficiently.By the end of this Linux security book, you will be able to confidently set up a Linux server that will be much harder for malicious actors to compromise.What you will learnCreate locked-down user accounts with strong passwordsConfigure firewalls with iptables, UFW, nftables, and firewalldProtect your data with different encryption technologiesHarden the secure shell service to prevent security break-insUse mandatory access control to protect against system exploitsHarden kernel parameters and set up a kernel-level auditing systemApply OpenSCAP security profiles and set up intrusion detectionConfigure securely the GRUB 2 bootloader and BIOS/UEFIWho this book is forThis book is for Linux administrators, system administrators, and network engineers interested in securing moderate to complex Linux environments. Security consultants looking to enhance their Linux security skills will also find this book useful. Working experience with the Linux command line and package management is necessary to understand the concepts covered in this book.