Computer Science and Technology

CompTIA® Linux+ XK0-005 Exam Cram is an all-inclusive study guide designed to help you pass the updated version of the CompTIA Linux+ exam. Prepare for test day success with complete coverage of exam objectives and topics, plus hundreds of realistic practice questions. Extensive prep tools include quizzes, Exam Alerts, and our essential last-minute review CramSheet. The powerful Pearson Test Prep practice software provides real-time assessment and feedback with two complete exams.   Covers the critical information needed to score higher on your Linux+ XK0-005 exam!   Manage files and directories Configure and manage storage Manage software configurations Implement identity management Implement and configure firewalls Create simple shell scripts to automate common tasks Perform basic container operations Analyze and troubleshoot storage issues and network resource issues   Prepare for your exam with Pearson Test Prep   Realistic practice questions and answers Comprehensive reporting and feedback Customized testing in study, practice exam, or flash card modes Complete coverage of Linux+ XK0-005 exam objectives

This handy cookbook teaches new-to-intermediate Linux users the essential skills necessary to manage a Linux system, using both graphical and command-line tools. Whether you run Linux in embedded, desktop, server, or cloud or virtual environments, the fundamental skills are the same. This book aims to get you up and running quickly, with copy-paste examples. Carla Schroder provides recipes that cover specific problems, with discussions that explain how each recipe works, as well as references for additional study. You'll learn how to: Use systemd, the new comprehensive service manager Build simple or complex firewalls with firewalld Set up secure network connections for Linux systems and mobile devices Rescue nonbooting systems Reset lost passwords on Linux and Windows Use dnsmasq to simplify managing your LAN name services Manage users and groups and control access to files Probe your computer hardware and monitor hardware health Manage the GRUB bootloader and multiboot Linux and Windows Keep accurate time across your network with the newest tools Build an internet router/firewall on Raspberry Pi Manage filesystems and partitioning

The best test preparation resource for the CompTIA Linux+ certification exam In the newly updated Third Edition of CompTIA Linux+ Practice Tests: Exam XK0-005, veteran Linux expert, Steve Suehring, delivers an instructive set of practice questions written to get you ready to ace the new XK0-005 test. Providing hundreds of domain-by-domain questions covering system management, security, scripting, containers, automation, and troubleshooting, the book helps you prepare for the exam with confidence and efficiency. You'll be able to pinpoint those areas you've mastered and those which require more study, as well as get a feel for the structure of the test itself. The book also offers: Hundreds of practice questions that reinforce your skills and knowledge A great way for practicing and aspiring Linux network and system administrators to improve their on-the-job skills One year of complimentary access after activation to the online Sybex test bank, where you can study and work through hundreds of questions An indispensable resource for anyone preparing for the CompTIA Linux+ exam, CompTIA Linux+ Practice Tests: Exam XK0-005, Third Edition, is also a must-have for new and experienced sysadmins and network administrators seeking to identify areas of strength and weakness and improve their grasp of Linux systems.

Advance your understanding of the Linux command line with this invaluable resource  Linux Command Line and Shell Scripting Bible, 4th Edition is the newest installment in the indispensable series known to Linux developers all over the world. Packed with concrete strategies and practical tips, the latest edition includes brand-new content covering: Understanding the Shell   Writing Simple Script Utilities   Producing Database, Web & Email Scripts   Creating Fun Little Shell Scripts  Written by accomplished Linux professionals Christine Bresnahan and Richard Blum, Linux Command Line and Shell Scripting Bible, 4th Edition teaches readers the fundamentals and advanced topics necessary for a comprehensive understanding of shell scripting in Linux. The book is filled with real-world examples and usable scripts, helping readers navigate the challenging Linux environment with ease and convenience.  The book is perfect for anyone who uses Linux at home or in the office and will quickly find a place on every Linux enthusiast's bookshelf.

Get hands-on recipes to make the most of Ubuntu Server, CentOS 7 Linux Server and RHEL 7 ServerAbout This Book* Get Linux servers up and running in seconds,* In-depth guide to explore new features and solutions in server administration* Maintain performance and security of your server solution by deploying expert configuration adviceWho This Book Is ForThis Learning Path is intended for system administrators with a basic understanding of Linux operating systems and written with the novice-to-intermediate Linux user in mind. To get the most of this Learning Path, you should have a working knowledge of basic system administration and management tools.What You Will Learn* Set up high performance, scalable, and fault-tolerant back ends with web and database servers* Facilitate team communication with a real-time chat service and collaboration tools* Monitor, manage and develop your server's file system to maintain a stable performance* Gain best practice methods on sharing files and resources through a network* Install and configure common standard services such as web, mail, FTP, database and domain name server technologies* Create kickstart scripts to automatically deploy RHEL 7 systems* Use Orchestration and configuration management tools to manage your environmentIn DetailLinux 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 Cookbook2)CentOS 7 Linux Server Cookbook, Second Edition3)Red Hat Enterprise Linux Server CookbookStyle and approachThis easy-to-follow practical guide contains hands on examples and solutions to real word administration problems and problems faced when building your RHEL 7 system from scratch using orchestration tools.

Master the complexities of Bash shell scripting and unlock the power of shell for your enterpriseAbout This Book- Identify the high level steps such as verifying user input, using command lines and conditional statements in creating and executing simple shell scripts- Create and edit dynamic shell scripts to manage complex and repetitive tasks- Learn about scripting in Perl and programming in Python as a BASH scripting alternative with this practical, step-by-step guideWho This Book Is ForMastering Linux Shell Scripting has been written for Linux administrators who want to automate tasks in their daily lives, saving time and effort. You'll need to have command-line experience and be familiar with the tasks that you need to automate.What You Will Learn- Use the type command to identify the order of command evaluation- Create interactive scripts that prompt for user input- Foster menu structures for operators with little command-line experience- Develop scripts that dynamically edit web configuration files to produce a new virtual host- Write scripts that use AWK to search and reports on log files- Draft effective scripts using functions as building blocks, reducing maintenance and build time- Make informed choices by comparing different script languages such as Perl and Python with BASHIn DetailShell scripting is a quick method to prototype a complex application or a problem by automating tasks when working on Linux-based systems. Using both simple one-line commands and command sequences complex problems can be solved with ease, from text processing to backing up sysadmin tools.In this book, you'll discover everything you need to know to master shell scripting and make informed choices about the elements you employ. Get to grips with the fundamentals of creating and running a script in normal mode, and in debug mode. Learn about various conditional statements' code snippets, and realize the power of repetition and loops in your shell script. Implement functions and edit files using the Stream Editor, script in Perl, program in Python - as well as complete coverage of other scripting languages to ensure you can choose the best tool for your project.Style and approachThe book will capture your attention and keep you engaged with the simplicity and clarity of each explanation. Every step is accompanied with screen captures so you can cross-check the results before moving on.

Kali Linux: a complete pen testing toolkit facilitating smooth backtracking for working hackersAbout This Book*Conduct network testing, surveillance, pen testing and forensics on MS Windows using Kali Linux*Footprint, monitor, and audit your network and investigate any ongoing infestations*Customize Kali Linux with this professional guide so it becomes your pen testing toolkitWho This Book Is ForIf you are a working ethical hacker who is looking to expand the offensive skillset with a thorough understanding of Kali Linux, then this is the book for you. Prior knowledge about Linux operating systems and the BASH terminal emulator along with Windows desktop and command line would be highly beneficial.What You Will Learn*Set up Kali Linux for pen testing*Map and enumerate your Windows network*Exploit several common Windows network vulnerabilities*Attack and defeat password schemes on Windows*Debug and reverse-engineer Windows programs*Recover lost files, investigate successful hacks and discover hidden data in innocent-looking files*Catch and hold admin rights on the network, and maintain backdoors on the network after your initial testing is doneIn DetailMicrosoft Windows is one of the two most common OS and managing its security has spawned the discipline of IT security. Kali Linux is the premier platform for testing and maintaining Windows security. Kali is built on the Debian distribution of Linux and shares the legendary stability of that OS. This lets you focus on using the network penetration, password cracking, forensics tools and not the OS.This book has the most advanced tools and techniques to reproduce the methods used by sophisticated hackers to make you an expert in Kali Linux penetration testing. First, you are introduced to Kali's top ten tools and other useful reporting tools. Then, you will find your way around your target network and determine known vulnerabilities to be able to exploit a system remotely. Next, you will prove that the vulnerabilities you have found are real and exploitable. You will learn to use tools in seven categories of exploitation tools. Further, you perform web access exploits using tools like websploit and more. Security is only as strong as the weakest link in the chain. Passwords are often that weak link. Thus, you learn about password attacks that can be used in concert with other approaches to break into and own a network. Moreover, you come to terms with network sniffing, which helps you understand which users are using services you can exploit, and IP spoofing, which can be used to poison a system's DNS cache. Once you gain access to a machine or network, maintaining access is important.Thus, you not only learn penetrating in the machine you also learn Windows privilege's escalations. With easy to follow step-by-step instructions and support images, you will be able to quickly pen test your system and network.

About This BookMove beyond the basics of how a Linux machine works and gain a better understanding of Linux networks and their configurationImpress your peers by setting up and configuring a Linux server and its various network elements like a proThis is a hands-on solution guide to building, maintaining, and securing a network using LinuxWho This Book Is ForThis book is targeted at Linux system administrators who have a good basic understanding and some prior experience of how a Linux machine operates, but want to better understand how various network services function, how to set them up, and how to secure them. You should be familiar with how to set up a Linux server and how to install additional software on them.What You Will LearnRoute an IPv6 netblock to your local networkConfigure Samba as a file server, NFS and WebDAV through ApacheUse SSH for remote console accessConfigure NGINX with TLSSecure XMPP with TLSLeverage iptables6 to firewall your IPv6 trafficConfigure Samba as an Active Directory-compatible directory serviceIn DetailA Linux machine can be configured as a networked workstation, DNS server, mail server, firewall, gateway and many other things. Due to this, a good understanding of managing network services is one of the main skill sets of a Linux system administrator. By knowing how to configure system network in an optimal manner, Linux administrators can deploy and configure many network services in enterprise environments.Starting with a Linux router that passes traffic between two private networks, you will see how to enable NAT in order to access the Internet from it and set up a DHCP server on your network to ease configuration of client systems. You will then move on to configuring your DNS server on your local network using BIND9, including having it dynamically create records for your network via your DHCP system. Next, we'll configure Samba to centralize authentication. By the end of the book, you will have a network with a number of services running on it, and will implement monitoring to detect problems as they occur.

For system administrators, programmers, and end users, shell command or carefully crafted shell script can save you time and effort, or facilitate consistency and repeatability for a variety of common tasks. This cookbook provides more than 300 practical recipes for using bash, the popular Unix shell that enables you to harness and customize the power of any Unix or Linux system. Ideal for new and experienced users alike--including proficient Windows users and sysadmins--this updated second edition helps you solve a wide range of problems. You'll learn ways to handle input/output, file manipulation, program execution, administrative tasks, and many other challenges. Each recipe includes one or more scripting examples and a discussion of why the solution works. You'll find recipes for problems including: Standard output and input, and executing commands Shell variables, shell logic, and arithmetic Intermediate shell tools and advanced scripting Searching for files with find, locate, and slocate Working with dates and times Creating shell scripts for various end-user tasks Working with tasks that require parsing Writing secure shell scripts Configuring and customizing bash