Virtual operating system for Windows to Linux migration

This article presents an overview of computer operating systems (OS) and emerging trends. OS is simply defined as an interface between computer hardware and the user. The objective of the study is to investigate the emerging trends of OS and to find out the direction of OS for modern computing systems. To achieve this goal the paper looks at the concepts of OS, its underlying architectures and evolution. The papers also outline the components of the OS provide knowledge on security issues with OS architectures and provide best practices to secure OS. The paper found out that the current trends in OS include IoT OS, Cloud OS, AI-powered OS, Blockchain OS, Hybrid OS and Container OS. The paper compares the strengths and weaknesses of the major OS. The Paper proposes a double-layer security approach where the OS is hardened with security policies and embedding security protocols in the Hardware architecture of the OS. It was discovered that every technology comes with its unique architecture and OS. This makes it worrisome for engineers to crack their brains to develop such a system. The paper further proposes the development of a universal OS for all architectures leaving room for further expansion while mitigating power consumption issues by incorporating green computing technology in the design architecture.

NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract Using Programming Projects in an Operating Systems Course as a Capstone Software Engineering Experience Computer Engineering Technology students at the University of Dayton take two fundamental programming courses teaching the basics of algorithmic problem solving along with the VBA and C++ syntaxes. These courses develop a strong programming foundation for the students; however, they lack the ability to introduce software programming within larger software systems. The final course related to software development is a required operating systems course. This course contains three fundamental goals: to develop the students’ understanding of key operating system concepts, to increase the students’ software engineering capabilities, and to introduce the students to the internal workings of the Linux and Windows operating systems. The operating systems course relies heavily on software programming exercises as a key instrument in teaching students the framework and applications of modern operating systems. The unique aspect of this approach is that the programming projects are designed not as standalone activities, but instead as individual components of a larger software system. Therefore, each programming project focuses not just on learning new syntax related to operating system concepts, but also in how these concepts are relevant to the software system being developed. Students develop programs for both the Microsoft Windows and Linux operating systems, working heavily with their associated application programming interfaces and investigating processes, threads, synchronization, input and output, and scheduling issues. A complete course overview and synopsis of the software programming projects will be presented along with student performance and comments from an end of the semester survey. Introduction The Computer Engineering Technology (CET) Program at the University of Dayton (UD) was started in 1999 and included two software programming courses. These courses predominately focused on teaching the fundamentals of software programming and the syntax associated with the VBA and C++ languages. Likewise, to satisfy the ABET outcome requirements for computer engineering technology programs, the ETC Program at UD also required a new 3 credit lecture course entitled “Concepts & Applications of Operating Systems” to be taken during the students’ Junior year of study.1 This course was structured to provide students hands-on exposure to the internal workings of modern operating systems. During the 2004/2005 academic year, the material being taught in the software programming was evaluated. In accordance with the Computing Curricula 2001 (CC2001) report by the Computer Society of the Institute for Electrical and Electronic Engineers (IEEE-CS) and the Association for Computing Machinery (ACM), the two software programming courses being taught fell within the traditional imperative-first approach. This approach starts students off with software programming activities without any real preparations.2 After careful review, it was found that the student population being served needed to be taught the algorithmic thought process prior to the syntax as many of the students had no prior exposure to software programming and were struggling more with defining the problem solutions than with the specific syntax being taught.3 A modified algorithms-first approach from CC2001 report was applied to these courses. Instead

An important goal of software security is to ensure sensitive/secret data owned by a program shall be exclusively accessible by the program. An obstacle to such security goal is that modern commodity operating systems (OS) for the sake of speed and flexibility have a unified linear address space--any OS kernel program can access all the linear addresses. As a result, rootkits or malicious system software are able to control the OS virtual address space, harvest the sensitive data used by software programs on the compromised computer, and report the data to remote entities controlled by hackers.In this paper, we present a holistic approach against sophisticated malware. Instead of focusing on the security of various abstraction layers of OS, we utilize the hardware techniques to directly provide the trust services to software programs. Without modifying OS, we leverage the virtual machine monitor technologies to create a lightweight hypervisor for fine-grain software runtime memory protection. As a result, a program's memory could be hidden from other high privilege system software in a single commodity OS. In addition, we propose the data locker component in the hypervisor, which prevents the sensitive data of software program in persistent storage from leaking to rootkits or other malware. For the performance evaluation, the implementation based on hardware-assisted x86 virtualization technology is presented and experimental results are reported.

Every Personal Computer (PC) you buy has to have an Operating System. This is the master program that enables the machine to carry out the routine, usually very simple, functions that make it work and enable it to run the programs you purchase. The most popular operating system is called MS-DOS. When you have finished this training course you should be able to use the important DOS commands and will then be able, should you wish to do so, to use some of the more complex and sophisticated commands that you will find in the DOS handbook that comes with every PC you buy.

An upper bound model for TCP and UDP throughput in IPv4 and IPv6

Android is currently the most popular Operating System (OS) which is widespreadly installed on mobile phones, smart TVs and other wearable devices. Due to its overwhelming market share, Android attracts the attentions from many attackers. Reverse Engineering technology plays an important role in the field of Android security, such as cracking applications, malware analysis, software protection, etc. By deploying anti-debugging technology on Android applications, this paper designs and implements a reinforcement scheme for Android software with comprehensive utilization of encryption, dynamic loading and shell technologies. Evaluated the performance on different aspects, the proposed scheme can work effectively for android software protection.

The design principles of operating systems have been isolated and comprehensively expounded in texts that have appeared in the last decade which are suitable for either an advanced undergraduate or low-level graduate course. The topics covered are those listed in the course outline for CS10, Operating Systems and Computer Architecture II in Curriculum '78 (1). Generally one of two approaches is taken. The first is that the computer architecture already decides many of the fundamental policies of the operating system which it is to support. The second is that an operating system must solve certain allocation and scheduling problems in order to provide a user with a variety of services and to manage its own resources efficiently, and that once identified, solutions to the problems must be implemented on some computer architecture. In either case the text usually culminates with a limited project in which students design and implement some type of multiprogramming operating system.This report outlines the approach taken to present IBM's Multiple Virtual Storage Operating System (MVS) in this setting.

HVACSIM User’s Guide Update Cheol Park Building Environment Division Building and Fire Research Laboratory National Institute of Standards and Technology Gaithersburg, MD 20899-8631 The first version of HVACSIM, which stands for “HVAC SIMulation PLUS other systems”, as introduced by National Institute of Standards and Technology (NIST) in 1985 as a computer simulation tool to simulate entire building systems [1]. Since then, the HVACSIM computer program package and manuals have been distributed to researchers, students, and consultants in more than 40 countries around the world. Since the first distribution of the program to public, a number of modifications have been made. Because some of statements in the Fortran 77 computer code of the HVACSIM used more than 20 years have become obsolete in the context of today’s Fortran 90/95 standards, an upgrade to Fortran 90/95 standards was deemed necessary. This conversion task was recently completed by NIST. During the conversion, the logic flows were maintained as close to the original as possible. This update manual is a condensed guide to running the programs in the HVACSIM package. Much of the substance of this manual is extracted directly from the previous manuals. This manual is intended to update and supplement the previous manuals, not to replace them. To confirm correct operation of the new code and illustrate its use, some of examples of system and building shell simulations were chosen from the previous documents. Simulation runs were made in the command line interface of a popular operating system in step-by-step manner. The input and output information of those runs is listed in this manual.

Chapter 6 - Eliminating the Security Weakness of Linux and Unix Operating Systems

Moving to a new system is costly and error-prone. The problem can be reduced through use of a virtual operating system that disentangles computing environments from their underlying operating systems. The authors report on their successful experience in doing this and achieving inter-system uniformity at all three levels of user interface: virtual machine, utilities, and command language.

Prolog is a programming language based on predicate logic. Its successor, Concurrent Prolog, was designed to meet the needs of a multiprocessing environment to the extent that it may be desirable as a succinct language for writing operating systems. Here, we demonstrate the feasibllity of implementing a distributed interpreter for Concurrent Prolog using traditional programming tools under a multiprocess structuring methodology. We will discuss the considerations that must be made in a distributed environment and how the constructs of the language may be implemented. In particular, several subtle pitfalls associated with the implementation of read-only variables and the propagation of new bindings will be illustrated. In addition, a modification to Shapiro''s treatment of read-only variables is proposed in an attempt to ``clean up'''' the semantics of the language. (The discussion will centre around a primitive version of an interpreter for the language written in Zed (a language similar to C) on an Unix-like operating system, Verex. Although a brief introduction of Prolog and Concurrent Prolog will be given, it is assumed that the reader is familiar with the paper \underline{A Subset of Concurrent Prolog and Its Interpreter} by E.Y. Shapiro [Shapiro83].)

We report on the fourth in a series of studies on the reliability of application programs in the face of random input. Over the previous 15 years, we have studied the reliability of UNIX command line and X-Window based (GUI) applications and Windows applications. In this study, we apply our fuzz testing techniques to applications running on the Mac OS X operating system. We continue to use a simple, or even simplistic technique: unstructured black-box random testing, considering a failure to be a crash or hang. As in the previous three studies, the technique is crude but seems to be effective in locating bugs in real programs.We tested the reliability of 135 command-line UNIX utilities and thirty graphical applications on Mac OS X by feeding random input to each. We report on application failures - crashes (dumps core) or hangs (loops indefinitely) - and, where source code is available, we identify the causes of these failures and categorize them.Our testing crashed only 7% of the command-line utilities, a considerably lower rate of failure than observed in almost all cases of previous studies. We found the GUI-based applications to be less reliable: of the thirty that we tested, only eight did not crash or hang. Twenty others crashed, and two hung. These GUI results were noticeably worse than either of the previous Windows (Win32) or UNIX (X-Windows) studies.

Occasionally while using Leopard, you may find it necessary to utilize resources intended for other operating systems. With Apple’s new Intel-based computers combined with Leopard’s ability to work with different file systems and networks protocols, today your Mac can run just about any software, including entire other operating systems. This chapter will show you how your Mac can do the following: Work with a wide range of files and file systems Run Microsoft Windows or other operating systems and applications on your Mac Access Microsoft Windows systems remotely

Effective coordination and synchronization between processes remains a challenge that becomes even more important with the rise of multicore hardware. This thesis introduces Octopus, a coordination service for the Barrelfish operating system. Octopus addresses the problem of coordination between concurrent processes or activities in Barrelfish. The Octopus design is influenced by ideas from distributed computing. We show that these ideas are transferrable to operating systems. We used a declarative, logic programming engine to implement parts of the Octopus service and evaluate the benefits and drawbacks of this approach. In a case study, we used Octopus to write a service that is responsible for device management and bootstrapping the OS as well as a replacement for the Barrelfish name server. Our experience with Octopus has shown that it simplifies programming services that require complex coordination patterns by a great deal, while at the same time offering a flexible API for a programmer to solve a wide range of coordination and synchronization problems.

A Swappable Logic Unit (SLU) is an FPGA-based logic circuit that can be managed by a virtual hardware operating system. Since the SLU concept is still in its infancy, it is unreasonable to expect circuit design systems to be enhanced to include SLU awareness at this stage. Therefore, this paper describes a tool that can be used as a back end to any XC6200 circuit design system. It analyses XC6200 circuitry, to detect SLUs and then collect information about their external interfaces. This information is needed by an operating system so that it can manage the SLUs when they are in use.