...Unit 5 Exercise 1 security By Robert George From: Systems Admin To: Manager Internet security is important because Security Unauthorized Network Access or Hacking Unauthorized access is one of the major threats as far as Internet safety is concerned. Network security consists of the provisions made in an underlying computer network infrastructure, to protect the network and the network-accessible resources from unauthorized access. Windows Firewall is on by default in Windows 7, so you don't need to set it up—plus they have made it more flexible and easier to use. You may want to block all incoming connections. At the workstations, this might be overkill. Whatever level of protection you choose for your profiles, you'll be able to switch between them with ease. An easy way of protecting files from theft or hackers is Bitlocker for windows 7 Bitlocker protects your programs and passwords by encrypting the entire drive that windows and your data resides on. Another way is having parental control on your desktops to help keep viruses and Trojans off your pc. Also Using Microsoft Security Essentials helps guard against viruses, spyware, and other malicious software it provides real-time for your workstation p c’s it is also free and easy to use. Plus it won’t interrupt you work because it’s a quit program. Which brings us to windows defender witch is your first line of defense against spyware and other unwanted software. And in Windows 7, it's easier to use, with simpler...
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...PROCESS MANAGEMENT b.1) Multitasking is when there is two or more programs running at the same time and both are working. The processor will allocate some resources to each program. The processor switching back and forth between tasks so quickly that might look like the processor doing the two things at once. It is also means performing more than one process on a single CPU. Multiple processes are queued and wait for their turn to be executed on CPU, but it appears as if they are running in parallel. Each process provides the resources needed to execute a program and at least one thread of execution. A thread is entity within a process that can be scheduled for execution. Windows are supporting preemptive multitasking which creates the effect of simultaneous execution of multiple threads from multiple processes. To allow groups of processes to be managed as a unit, the job object is being used. The job objects are namable, securable, sharable objects that control attributes of the processes associated with them. A multithreaded process can manage mutually exclusive tasks with threads, such as providing a user interface and performing background calculations. Creating a multithreaded process can also be a convenient way to structure a program that performs several similar or identical tasks concurrently. For example, a named pipe server can create a thread for each client process that attaches to the pipe. This thread manages the communication between the server and the client...
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...Windows vs. Linux Enterprise Distribution Recommendation Introduction to UNIX Linux vs. Windows Enterprise Distribution Recommendation X Industries is a large sized business that is in the midst of a decision regarding wither or not to switch their existing Windows-based IT system over to a less proprietary product, Linux. This is no easy choice to make, considering X Industries is currently running 170+ Windows-based servers of various types. Their staff fulfills company operations on these servers with their 750+ array of desktop and laptop computers – all running Windows XP Professional. Linux may just be a little dog in the Microsoft park, but a company that makes the big switch can expect Linux to yield benefits in cost savings, increased security, and arguably better usability. However, each individual enterprise situation is always different, so a cookie cutter solution of which system to use will never suffice. Rather, the numbers through subjects of cost, market share, programming capabilities, software compatibility and availability, and the ever-important user interface will tell the best choice. Cost The only way to evaluate cost is to get down to the basics, and look at the statistics. The first topic of cost will center solely on the price for Windows operating system software, first for the network side, then the node side. Other topics will focus on the cost of the Ubuntu Linux distribution, which will run on the servers and desktops,...
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...Hardware and software COMPUTERS 1 Computers ENIAC – 1950 2 What is a computer? A data processing device designed to: } input … } data (e.g. mp3 3ile) } software (e.g., iTunes) } process data by applying software } output results } store data / program / results between uses Apple II – 1977 3 Computer hardware Storage Nonvolatile Non-portable (hard disk) Portable (e.g. CD) Battery Wall plug RAM (Random Access Memory) Volatile Power Source Mouse Keyboard Tablet Input Microphone Devices Webcam Accelerometer Central Central Processing Processing Units Units (cores) (cores) Monitor Printer Output Plotter Devices Projector Input Processing Output 4 Components of a computer } Hardware } CPU (Central Processor Unit): } I/O devices (Input / Output) } Storage } Power source } Software } Operating System } Applications Is it a computer? Universal computation } A processor with the right software can emulate any other data processing device } E.g., a smartphone can be a music player, translator, calculator, GPS navigator,...
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...International Journal of Research in Computer and Communication Technology, Vol 2, Issue 11, November- 2013 ISSN (Online) 2278- 5841 ISSN (Print) 2320- 5156 Windows, Linux and Mac Operating system Booting Process: a Comparative Study Prof. Amar Rajendra Mudiraj Assistant Professor MIT (E), Aurangabad,Maharashtra, India. Email:amarmudiraj@gmail.com Abstract This paper presents a comparative study of Booting Paradigm of Windows, Linux and Mac, the three popular operating systems. Booting process is the essential and first step perform by the OS after this process execution all other processes can get the chance to execute , so we may say that booting is the first process because of which all other OS processes can execute. This experimental study gives an overview on the similarity and difference in Booting Process. As every operating system have to initially do the booting and as every OS providing different feature of each others, the paper is highlighting those micro and essential similarities and differences having by the operating systems during the Booting Process. Keywords: Booting, Cold booting, Worm booting, Linux Booting, Windows Booting, Mac Booting. In Worm Booting the computer get restart without shutdown the system, in which the system application and memory just get cleared and then reloading the operating system in primary memory. With the above two booting types we also have some other flavor in the computer booting like Sleep, Hibernate. Power - ON Load Instruction...
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...Java Quick Reference Console Input Scanner input = new Scanner(System.in); int intValue = input.nextInt(); long longValue = input.nextLong(); double doubleValue = input.nextDouble(); float floatValue = input.nextFloat(); String string = input.next(); Console Output System.out.println(anyValue); JOptionPane.showMessageDialog(null, "Enter input"); GUI Input Dialog String string = JOptionPane.showInputDialog( "Enter input"); int intValue = Integer.parseInt(string); double doubleValue = Double.parseDouble(string); Message Dialog Primitive Data Types byte short int long float double char boolean 8 bits 16 bits 32 bits 64 bits 32 bits 64 bits 16 bits true/false Arithmetic Operators + * / % ++var --var var++ var-addition subtraction multiplication division remainder preincrement predecrement postincrement postdecrement Assignment Operators = += -= *= /= %= assignment addition assignment subtraction assignment multiplication assignment division assignment remainder assignment Relational Operators < >= == != less than less than or equal to greater than greater than or equal to equal to not equal Logical Operators && || ! ^ short circuit AND short circuit OR NOT exclusive OR if Statements if (condition) { statements; } if (condition) { statements; } else { statements; } if (condition1) { statements; } else if (condition2) { statements; } else { statements; } switch Statements switch (intExpression) { case value1: statements; break; ... case valuen: statements; break;...
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...Raj Narayan Saha | CIT1533 | SCM-024155 Raj Narayan Saha | CIT1533 | SCM-024155 Introduction to Operating Systems assignment 1 Introduction to Operating Systems assignment 1 Contents The Linux Operating System 1 The History of Linux 3 The linux mascot 4 linux and its fued with microsoft 4 The Advantages and Disadvantages of Linux 6 Comparing Linux to Windows 7 The increase in complexity of Operating Systems 8 advantages and disadvantages of this increased complexity 10 Client-Server Operating System 11 Plug and Play & Multitasking in Windows 13 plug and play 13 multitasking in windows 15 References 17 The Linux Operating System Before getting into Linux, a short introduction on what an Operating System is – An Operating System is a software layer that is between the hardware and the software that you actually use to get something productive. In other words, the operating system is what allows the software to talk to the hardware, such as storing information to the hard drive, to send out print jobs to the printer and so on and so forth. Figure [ 1 ] An excerpt from the Ubuntu (a Linux distribution) website on how and why it's free Figure [ 1 ] An excerpt from the Ubuntu (a Linux distribution) website on how and why it's free Now, onto Linux. Linux, like Microsoft Windows is an Operating System. Unlike Windows, however, Linux is open source, meaning one can readily find the source code for the OS for free and add or edit...
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............................................................................ 3 Windows.......................................................................................................................................................... 3 Linux ................................................................................................................................................................ 5 Registration ......................................................................................................................................................... 5 Application Components ..................................................................................................................................... 6 Application vs. Application no Apex ................................................................................................................ 6 Top Menu ........................................................................................................................................................ 6 Context Menu.................................................................................................................................................. 8 List of Nodes...
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...Arkansas Error Details | Steps to Resolve | Response Error Code: 101Primary Error Text: DOB Is MissingDescription: Date of Birth is missing in the Request | 1. Look up the Transaction in ASSIST.A. Verify that the Date of Birth appears in ASSIST on the Request page of the Transaction. If the Date of Birth appears in the Request, have the Agent rerun the Transaction. If the Date of Birth does not appear in the Request, have the Agent rerun the transaction by manually entering the ID # and Date of Birth.2. Look up the Customer File in the Admin Console.A. Verify that the Date of Birth appears on file. If the Date of Birth appears on file, have the Agent rerun the transaction by using the Customer ID #. If the Date of Birth does not appear on file, update if allowed according to the Customer Update Guidelines, and have the Agent rerun the Transaction. | Response Error Code: 102Primary Error Text: ID Type MissingDescription: Request is missing the ID Type (DL, SSN, CID, or ATL ID) | 1. Look up the Transaction in ASSIST.A. Verify that the ID # appears in ASSIST on the Request page of the Transaction. If the ID # appears in the Request, have the Agent rerun the Transaction. If the ID # does not appear in the Request, have the Agent rerun the transaction by manually entering the ID # and Date of Birth.2. Look up the Customer File in the Admin Console.A. Verify that the ID # appears...
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...International Journal of Electrical & Computer Sciences IJECS-IJENS Vol:12 No:04 25 Studying Main Differences Between Linux & Windows Operating Systems Lecturer/ Hadeel Tariq Al-Rayes Abstract—Comparisons between the Microsoft Windows and Linux computer operating systems are a long-running discussion topic within the personal computer industry. Throughout the entire period of the Windows 9x systems through the introduction of Windows 7, Windows has retained an extremely large retail sales majority among operating systems for personal desktop use, while Linux has sustained its status as the most prominent Free Software and Open Source operating system. After their initial clash, both operating systems moved beyond the user base of the personal computer market and share a rivalry on a variety of other devices, with offerings for the server and embedded systems markets, and mobile internet access. Linux and Microsoft Windows differ in philosophy, cost, versatility and stability, with each seeking to improve in their perceived weaker areas. Comparisons of the two operating systems tend to reflect their origins, historic user bases and distribution models. Index Term— Kernel, Linux, Operating Systems, Windows II. THE ESSENTIAL DIFFERENCES BETWEEN LINUX & WINDOWS (BEGINNERS LEVEL) 1- Drives don’t have letters, they have mountpoints The first thing that usually trips up people who come from Windows to Linux is that filesystems aren’t assigned letters the way they...
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...the award of the degree of BA in Computer Studies, University of Sunderland 2006 I. Abstract This dissertation details a project to design and produce a prototype Linux character environment file manipulation assisting application. The application is offering a friendly menu driven interface to handle the jobs that non-programmers keep finding cumbersome to master when it comes to working in a Unix/Linux interface, resulting in serious mistakes and much loss of productive time. The Linux File Management System is a basic program for every user at a Unix/Linux terminal. Advantages here include the fact that the support team does not have to be burdened with solving simple file based queries by the employees. The areas of Designing GUI interfaces in Linux and Windows versus Linux Security were researched and a prototype has been designed, developed and tested. An evaluation of the overall success of the project has been conducted and recommendations for future work are also given. Words II. Table of Contents 1) Introduction.................................................................................................................................4 1.1 Overview........................................................................................................4 1.2 Sponsor Background...........................................................................................................5 1.3 Research Topics.................
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...Installation Guidelines GRUB/LILO GRUB is the boot loader of choice for RedHat installations; however LILO may always be used in the case of most flavors of LINUX. GRUB/LILO can receive many different kernel level commands and it poses a major security risk if an attacker is able to compromise the kernel. In response you can make sure that only authorized users are able to perform those commands by password protecting during the installation process. If using GRUB, the password is by default stored as clear text, and so you will want modify the /etc/grub.conf file to store the password in an MD5 checksum. $ /sbin/grub–md5–crypt Password: (at the prompt enter the GRUB password you created at installation and press enter) $ #%t%661GFGftffgctTFTDd (This is the MD5 hash) edit the grub.conf file and replace the clear text password with the MD5 Hash. You must use the –MD5 option or the password will be stored as the MD5 Hash and not the encrypted password. Password – md5 $1$m0tLR/ $#%t%661GFGftffgctTFTDd Partitioning Partitioning correctly will help to mitigate against one specific type of denial of service. For example and attack designed to fill up a /tmp or spool directory. If your files are on the same partition as the directory under attack, your system could be rendered unusable. One should use a partition strategy where those directories that are most likely to be filled by an attacker. Typically this is /var and /home . If you are using a server for ftp or e–mail, you...
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...Using gretl for Principles of Econometrics, 4th Edition Version 1.0411 Lee C. Adkins Professor of Economics Oklahoma State University April 7, 2014 1 Visit http://www.LearnEconometrics.com/gretl.html for the latest version of this book. Also, check the errata (page 459) for changes since the last update. License Using gretl for Principles of Econometrics, 4th edition. Copyright c 2011 Lee C. Adkins. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation (see Appendix F for details). i Preface The previous edition of this manual was about using the software package called gretl to do various econometric tasks required in a typical two course undergraduate or masters level econometrics sequence. This version tries to do the same, but several enhancements have been made that will interest those teaching more advanced courses. I have come to appreciate the power and usefulness of gretl’s powerful scripting language, now called hansl. Hansl is powerful enough to do some serious computing, but simple enough for novices to learn. In this version of the book, you will find more information about writing functions and using loops to obtain basic results. The programs have been generalized in many instances so that they could be adapted for other uses if desired. As I learn more about hansl specifically...
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...The eXPeRT’s VOIce ® In .neT F# Robert Pickering Foreword by Don Syme Foundations of Foundations of F# Robert Pickering Foundations of F# Copyright © 2007 by Robert Pickering All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval system, without the prior written permission of the copyright owner and the publisher. ISBN-13: 978-1-59059-757-6 ISBN-10: 1-59059-757-5 Printed and bound in the United States of America 9 8 7 6 5 4 3 2 1 Trademarked names may appear in this book. Rather than use a trademark symbol with every occurrence of a trademarked name, we use the names only in an editorial fashion and to the benefit of the trademark owner, with no intention of infringement of the trademark. Lead Editors: James Huddleston, Ewan Buckingham Technical Reviewer: Don Syme Editorial Board: Steve Anglin, Ewan Buckingham, Gary Cornell, Jason Gilmore, Jonathan Gennick, Jonathan Hassell, Chris Mills, Matthew Moodie, Jeffrey Pepper, Dominic Shakeshaft, Matt Wade Project Manager: Elizabeth Seymour Copy Edit Manager: Nicole Flores Copy Editor: Kim Wimpsett Assistant Production Director: Kari Brooks-Copony Production Editor: Laura Cheu Compositor: Lynn L’Heureux Proofreader: Elizabeth Berry Indexer: Broccoli Information Management Artist: April Milne Cover Designer: Kurt Krames Manufacturing Director: Tom Debolski Distributed...
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...Interface Guidelines 12 Designing the Application Interface 13 Application User Interface Design 14 Comparing Windows Phone 7 and Android Navigation 18 Windows Phone 7 Frame and Page Structure 19 Application Templates 21 Summary 21 Related Resources 21 Chapter 3: The Developer and Designer Tools 23 A Comparison of Android and Windows Phone 7 Tools 23 Development Life Cycle and Windows Phone 7 Developer Tools 24 The UI Design Tools 26 Building Applications 33 Debugging 34 Summary 38 Chapter 4: C# programming 39 Managed Programming 40 A Comparison between C# Features and Java Classes 41 A Comparison of Important Class Libraries 51 The New features of C# 54 Comparing API Documentation Tools 58 NDoc 58 NDocs vs. Javadoc 61 Summary 61 Related Resources 62 Chapter 5: A Comparison of Application Life Cycles in Windows Phone 7 and Android 63 Multitasking in Android and Windows Phone 7 63 Tombstoning of Applications in Windows Phone 7 64 Life Cycle of a Windows Phone 7 Application 64 Role of Handlers in an Application’s Life Cycle 66 Comparing Life-cycle Methods 68 Tombstoning and Windows Phone 7 Life Cycle 69 Summary 74 Related Resources 74 Chapter 6: Storing Data and Preferences 75 Isolated Storage in Windows Phone 7 75 Use Cases 78 Managing the IsolatedStorage Space 79 Why Windows Phone 7 Does Not Use External Storage 80 Managing Content across...
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