Introduction to Data Management and File management Most computers are used for data processing‚ as a big growth area in the “information age” Data processing from a computer science perspective: Storage of data Organization of data Access to data Processing of data Data Structures vs File Structures Both involve: Representation of Data + Operations for accessing data Difference: Data structures: deal with data in the main memory File structures: deal with the data in the secondary
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Unix commands 6/27/12 10:24 AM Unix commands Note that there are thousands of commands available on a typical unix box. In bash‚ just hit the "Tab" key twice and say yes‚ to display the the commands currently available on your machine. A standard unix operating system lists currently thousands of commands. Type x to list all commands starting with x. The following list contains some of the more frequently used programs. Access Control exit - terminate a shell (see "man sh" or "man csh")
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Unix * (officially trademarked as UNIX‚ sometimes also written as Unix with small caps) is a computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs‚ including Ken Thompson‚ Dennis Ritchie‚ Brian Kernighan‚ Douglas McIlroy‚ and Joe Ossanna. Today’s Unix systems are split into various branches‚ developed over time by AT&T as well as various commercial vendors and non-profit organizations. The Open Group‚ an industry standards consortium‚ owns the “Unix”
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Some Basic UNIX Commands NB*”Rm” The UNIX operating system has for many years formed the backbone of the Internet‚ especially for large servers and most major university campuses. However‚ a free version of UNIX called Linux has been making significant gains against Macintosh and the Microsoft Windows 95/98/NT environments‚ so often associated with personal computers. Developed by a number of volunteers on the Internet such as the Linux group and the GNU project‚ much of the open-source software
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UNIX‚ Linux‚ and Windows Server Critique POS/420 Name Professor Date University of Phoenix Abstract The following sections in this paper focus on analyzing operating systems for Riordan Manufacturing Inc. that specializes in plastic molding and design. Team B concentrated on five main areas of UNIX‚ Linux‚ and Windows Server. The five areas include Security‚ Administration‚ Networking‚ Performance‚ and Programmability. The team explains the existing systems‚ followed by comparing advantages
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implementation of unequal error protection in the form of hierarchical modulation. Bibliography 1. Unequal Error protection of H.264/AVCvideo Using Hierarchical QAM. Woodward‚ Ahmed B. Abdurrhman and Michael E. Srbija : s.n.‚ 2008. Telekomunikacioni forum. pp. 593-596. 2. Broadcast Channels. Cover‚ Thomas M. 1972. IEEE TRANSACTIONS ON INFORMATION THEORY. Vol. 18. 3. A Recursive Algorithm for the Exact BER Computation of Generalized Hierarchical QAM Constellations. Pavan K. Vitthaladevuni‚ Mohamed-Slim
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CHAPTER 1 History of Debian Unix/Linux UNIX has been a popular OS for more than two decades because of its multi-user‚ multi-tasking environment‚ stability‚ portability and powerful networking capabilities. In the late 1960s‚ researchers from General Electric‚ MIT and Bell Labs launched a joint project to develop an ambitious multi-user‚ multi-tasking OS for mainframe computers known as MULTICS (Multiplexed Information and Computing System). MULTICS failed (for some MULTICS enthusiasts"failed" is
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design for a file system. When American Telephone & Telegraph Company withdrew from a time sharing system collaboration project called Multics (Multiplexed Information and Computing Service) the reluctant attitude of a corporation gave birth to what Thompson saw as an emasculated version of Multics and dubbed it “Un-multiplexed Information and Computing Service or Unics. Later that morphed into what is known today and what some consider as one of the best computer operating systems called UNIX. As years
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Abstract This paper is a general overview of Unix operating system. It starts by presenting a brief history of the early development of Unix. It concentrates on main aspects of Unix operating system. Key concepts covered are interactive multi-user operating systems‚ the design objectives of Unix‚ file-store organization‚ text processing and programming‚ the role of C programming language with regard to portability and reliable system software‚ process control (signals and fork)‚ error logging
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UNIX versus Windows Compare and Contrast Analysis of Solaris 10 and Windows 2003 Team "A" University of Phoenix Online POS 420 Introduction to UNIX Carlie VanWilligen February 20‚ 2007 Compare and contrast of operating systems There are many operating systems in use today. There are basically three types of operating systems Windows‚ Macintosh‚ and UNIX/Linux. In this paper we are going to compare and contrast Solaris and Windows Server 2003. Solaris is part of the UNIX family and
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