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Do this and that at this and that time or do it non stop. But how to do it? The micro-course describes many useful mechanisms connected with running cyclical operations. It discusses how to create a script working non stop, the watch command running a given command continuously and the cron mechanism more complicated than them and enabling specification of the time of day, week or month of running the command.
In my work, I keep coming across networks and websites with significant security problems. In this book, I try to show the reader how easy it is to exploit security holes with various tools. Therefore, in my opinion, anyone who operates a network or a website should know to some extent how various hacking tools work to understand how to protect themselves against them. Many hackers don't even despise small home networks. Even if the topic is very technical, I will try to explain the concepts in a generally comprehensible form. A degree in computer science is by no means necessary to follow this book. Nevertheless, I don't just want to explain the operation of various tools, I also want to explain how they work in such a way that it becomes clear to you how the tool works and why a certain attack works.
The CompTIA Linux+/LPIC-1 Training and Exam Preparation Guide, First Edition is a comprehensive resource designed and written with one fundamental goal in mind: teach Linux in an easy and practical manner while preparing for the Linux+/LPIC-1 exams. This book provides an in-depth coverage of all official exam objectives. This book is organized in two parts: Part One covers LX0-103/101-400 exam objectives and Part Two covers LX0-104/102-400 exam objectives. The book includes hands-on examples, step-by-step exercises, chapter-end review of concepts, files, and commands learned, and 790 challenging practice questions. This book uses "learn-by-doing" methodology. It begins with guidance on how to download a virtualization software and two Linux distribution versions and then provides instructions on how to create VMs and install Linux in them to set up a lab environment for hands-on learning. Throughout the book, appropriate command prompts are employed to identify the lab system and user to run a command. Each command and task presented in the book was actually performed and tested on lab systems. Followed by the lab environment setup in Part One, the book presents the essentials of Linux incl. interaction with Linux, basic commands, file management (permissions, ownership, linking, searching, special permissions, editing), filter programs, regex, shell features, and process handling. Subsequent topics focus on system administration incl. shared libraries, Debian and RPM package management, system boot and initialization, hardware management, kernel modules, storage partitioning, file system creation and repairs, quota handling, and swap space administration. This brings Part One to an end and you should be able to take the quiz in Appendix A to test your readiness for the LX0-103/101-400 exam. Part Two covers all the objectives for the LX0-104/102-400 exam. It covers shell scripts with a presentation and line-by-line analysis of several scripts. Building a simple SQL database and performing queries comes next. A detailed comprehension of local authentication files, user creation, password aging, and shell startup files follows. The book covers networking concepts, reference models, and terms that accompany exercises on interface configuration, hostname change, and route management. A discussion of network testing and debugging tools is furnished and their usage is demonstrated, followed by topics on internationalization, localization, time synchronization, name resolution, X Window, display/desktop managers, accessibility options, printer and print queue administration, task scheduling, system logging, system and service access controls, emailing and email aliasing, searching for special files, and so on. This brings Part Two to an end and you should be able to take the quiz in Appendix C to test your readiness for the LX0-104/102-400 exam. Highlights: * 100% coverage of ALL official exam objectives (version 4.0) * Enumerated and descriptive knowledge areas (under exam objectives) to assist in identifying and locating them * A summarized and convenient view showing exam objectives, chapters they are discussed in, associated weights, the number of questions to expect on the real exam, and other useful information * Separate section on each exam * 15 chapters in total (8 for LX0-103/101-400 and 7 for LX0-104/102-400) * Detailed guidance on building lab environment * 49 tested, hands-on exercises with explanation * Numerous tested, practical examples for clarity and understanding * Chapter-end one-sentence review of key topics * 790 single-response, multiple-response, and fill-in-the-blank practice questions/answers to test your knowledge of the material and exam readiness * Equally good for self-study and in-class training
Based on Red Hat Enterprise Linux 6 (RHEL 6), this guide covers all official exam objectives and includes more than 100 exercises, more than 550 exam review questions, more than 70 practice labs, and two sample exams.
The Department of Defense (DOD) considers the transformation1 of the U.S. military a strategic imperative to meet the security challenges of the new century. In October 1998, DOD established a joint concept development and experimentation program to provide the engine of change for this transformation. The U.S. Joint Forces Command, the executive agent of the program, carries out experiments-with support from the military services, the combatant commands, and other DOD organizations-to explore and analyze new joint operational and organizational concepts. The experiments can include studies and analyses, conferences, workshops, seminars, war games, and simulated or live field experiments. On the basis of these experiments, the Joint Forces Command recommends changes aimed at achieving significant improvements in joint capabilities. The Joint Requirements Oversight Council2 reviews the Command's recommendations, and the Chairman of the Joint Chiefs of Staff is responsible for approving them. The Council also oversees the implementation of approved recommendations. The cumulative changes are expected to contribute to the way U.S. military forces are transformed. In November 2001, DOD also created an Office of Force Transformation to foster innovation and experimentation and assist the Secretary of Defense to develop guidance and identify strategies and policies for transformation. Because of the central role DOD's joint experimentation program plays in military transformation, we reviewed related activities to determine whether changes are needed to improve the program's ability to focus on future joint operations, military transformation, and the rapid integration of results.
The Solaris 10 System Administrator Certification Exam Prep 2 is the ideal book for both new and seasoned system administrators. This book will give you the insight you need into the newest certification exams for system administrators, the 310-200 and the 310-202. It offers classroom-style training by one of the best and well-known authors in the Solaris world, Bill Calkins. It will equip you with vital knowledge for success on exam day plus it acts a reference guide that will come in handy after the test. The content addresses all the new exam objectives in detail and will show you how to apply this knowledge to real-world scenarios.
This book constitutes the refereed proceedings of the 13th IFIP WG 6.1 International Conference on Formal Methods for Open Object-Based Distributed Systems, FMOODS 2011, and the 31st IFIP WG 6.1 Formal Techniques for Networked and Distributed Systems, FORTE 2011, held in Reykjavik, Island, in June 2011, as one of the DisCoTec 2011 events. The 21 revised full papers presented together with one invited talk were carefully reviewed and selected from 65 submissions. The topics covered are formal verification, formal modeling and specification, run-time monitoring, and testing to address challenges in many different application areas, including dynamic and ad hoc networks, mobile and adaptive computation, reactive and timed systems, business processes, and distributed and concurrent systems and algorithms.
Highlights: > Updated to the latest version of Red Hat Enterprise Linux 7 > Upated to cover ALL official exam objectives for the RHCSA and RHCE exams based on Red Hat Enterprise Linux 7 > Equally good for self-study and in-class training > Step-by-step exercises to accomplish tasks > Do-It-Yourself challenge labs at the end of each chapter > Concepts explained with diagrams > Commands and options summarized in tables > Exam tips included > FOUR scenario-based sample exams (TWO for RHCSA and TWO for RHCE) > TWENTY-FIVE chapters (THIRTEEN for RHCSA and TWELVE for RHCE) > Separate sections on RHCSA and RHCE RHCSA Section (chapters 1 to 13): covers local and network (automated with kickstart) RHEL7 installations, general Linux concepts and basic tools, compression and archiving, text file editing, file manipulation and security, processes and task scheduling, bash shell features, software package administration, yum repository configuration, host virtualization, virtual machines, system boot, kernel management, system initialization and service management with systemd, local logging, users and groups, LVM and file systems, AutoFS, Swap, ACLs, firewall, SELinux, network interfaces, NTP/LDAP clients, SSH, and TCP Wrappers. RHCE Section (chapters 14 to 25): covers shell scripting, interface bonding and teaming, IPv6 and routing configuration, NTP, firewalld, Kerberos authentication, kernel tuning, resource utilization reporting, network logging, block storage sharing with iSCSI, file sharing with NFS and Samba/CIFS, HTTP/HTTPS web servers and virtual hosting, Postfix mail SMTP, DNS, and MariaDB. Each chapter lists major topics and relevant exam objectives in the beginning and ends with a summary followed by review questions/answers and Do-It-Yourself challenge labs.
Updated edition of the bestselling guide for planning attack and defense strategies based on the current threat landscape Key FeaturesUpdated for ransomware prevention, security posture management in multi-cloud, Microsoft Defender for Cloud, MITRE ATT&CK Framework, and moreExplore the latest tools for ethical hacking, pentesting, and Red/Blue teamingIncludes recent real-world examples to illustrate the best practices to improve security postureBook Description Cybersecurity – Attack and Defense Strategies, Third Edition will bring you up to speed with the key aspects of threat assessment and security hygiene, the current threat landscape and its challenges, and how to maintain a strong security posture. In this carefully revised new edition, you will learn about the Zero Trust approach and the initial Incident Response process. You will gradually become familiar with Red Team tactics, where you will learn basic syntax for commonly used tools to perform the necessary operations. You will also learn how to apply newer Red Team techniques with powerful tools. Simultaneously, Blue Team tactics are introduced to help you defend your system from complex cyber-attacks. This book provides a clear, in-depth understanding of attack/defense methods as well as patterns to recognize irregular behavior within your organization. Finally, you will learn how to analyze your network and address malware, while becoming familiar with mitigation and threat detection techniques. By the end of this cybersecurity book, you will have discovered the latest tools to enhance the security of your system, learned about the security controls you need, and understood how to carry out each step of the incident response process. What you will learnLearn to mitigate, recover from, and prevent future cybersecurity eventsUnderstand security hygiene and value of prioritizing protection of your workloadsExplore physical and virtual network segmentation, cloud network visibility, and Zero Trust considerationsAdopt new methods to gather cyber intelligence, identify risk, and demonstrate impact with Red/Blue Team strategiesExplore legendary tools such as Nmap and Metasploit to supercharge your Red TeamDiscover identity security and how to perform policy enforcementIntegrate threat detection systems into your SIEM solutionsDiscover the MITRE ATT&CK Framework and open-source tools to gather intelligenceWho this book is for If you are an IT security professional who wants to venture deeper into cybersecurity domains, this book is for you. Cloud security administrators, IT pentesters, security consultants, and ethical hackers will also find this book useful. Basic understanding of operating systems, computer networking, and web applications will be helpful.