Overview of Functions of an Operating System Norman Matloff University of California‚ Davis ©2001‚ N. Matloff May 30‚ 2001 Contents 1 Introduction 1.1 It’s Just a Program! 1.2 What Is an OS for‚ Anyway? 1.3 A Bit More on System Calls 1.4 Making These Concepts Concrete: Commands You Can Try Yourself 2 System Bootup 3 Application Program Loading 4 Timesharing 4.1 Many Processes‚ Taking Turns 4.2 Example of OS Code: Linux for Intel CPUs 4.3
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ROS (Robot Operating System) is a framework for robot software development‚ providing operating system-like functionality on top of a heterogenous computer cluster. ROS was originally developed in 2007 under the name switchyard by the Stanford Artificial Intelligence Laboratory in support of the Stanford AI Robot (STAIR[1]) project. As of 2008‚ development continues primarily at Willow Garage‚ a robotics research institute/incubator‚ with more than twenty institutions collaborating in a federated
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The Memory System Memory is a very important aspect in a person’s life. It enables that individual to store information about various things that they can recall upon at a later time when that information is needed. The applications of your memory are boundless and are used every day whether we realize it or not for example taking test‚ fixing something around the house‚ playing a sport‚ etc. We are able to do this by associating that memory with a certain sounds‚ images‚ or colors that are familiar
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Types of Operating Systems Within the broad family of operating systems‚ there are generally four types‚ categorized based on the types of computers they control and the sort of applications they support. The categories are: * Real-time operating system (RTOS) - Real-time operating systems are used to control machinery‚ scientific instruments and industrial systems. An RTOS typically has very little user-interface capability‚ and no end-user utilities‚ since the system will be a "sealed box"
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File Systems The file system provides the environment for working with files and folders. Windows uses FAT12‚ FAT16‚ FAT32 and/or NTFS with NTFS almost always being the best choice. Linux also has a number of its own native file systems. The default file system for Linux used to be ext2‚ now it is typically ext3. MS-DOS used to be and Microsoft Windows continues to be the most popular operating system for 80386‚ 80486‚ and Pentium PCs. Because Linux started on 80386/80486 PCs‚ a connection
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Running Head: Operating Systems - Linux Operating Systems - Linux Prepared by Jackie Riddick University of Phoenix November 18‚ 2007 Operating Systems - Linux Brief History. Linus Torvalds created the Linux operating system in 1991 while he was still a student at the University of Helsinki in Finland. He developed and released the Linux kernel under the GNU General Public License so that its source code would be free to all and others could modify it to meet their specific needs. The
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Components of an Operating System In order to perform the actions requested by the computer’s users‚ an operating system must be able to communicate with those users. The portion of an operating system that handles this communication is often called the user interface. Older user interfaces‚ called shells‚ communicated with users through textual messages using a keyboard and monitor screen. More modern systems perform this task by means of a graphical user interface (GUI) in which objects to be
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change prior to final publication. Network Intrusion Detection System Embedded on a Smart Sensor Francisco Maciá-Pérez‚ Francisco J. Mora-Gimeno‚ Diego Marcos-Jorquera‚ Juan A. Gil-Martínez-Abarca‚ Héctor Ramos-Morillo‚ and Iren Lorenzo-Fonseca to cope with them‚ making impossible to scrutinize and understand adequately the network ’s security status [1]. In order to solve this problem‚ the distributed intrusion detection systems (DIDS) combine all these scattered alerts and make use of their
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HISTORY OF OPERATIMG SYSTEMS Operating systems (OS) provide a set of functions needed and used by most application programs on a computer‚ and the linkages needed to control and synchronize computer hardware. On the first computers‚ with no operating system‚ every program needed the full hardware specification to run correctly and perform standard tasks‚ and its own drivers for peripheral devices like printers and punched paper card readers. The growing complexity of hardware and application programs
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Operating system virtualization is a method of altering a standard operating system so it may handle multiple users all at the same time. These individual users would not have any interaction with one another. Their information would also remain separate‚ even though they are using the same system. While this technology has several uses‚ the most common uses are in hosting situations and server consoladation. With operating system virtualazation‚ a single system is set up to operate like several
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