ch15 - Chapter 15 UNIX and Linux Operating Systems...

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Chapter 15 UNIX and Linux Operating Systems Understanding Operating Systems, Fourth Edition
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Understanding Operating Systems, Fourth Edition 2 Objectives Objectives You should be able to describe: The similarities between UNIX and Linux The design goals for both operating systems The significance of using files to manipulate devices The differences between command-driven and menu-driven interfaces The roles of the Memory, Device, and Processor Managers
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Understanding Operating Systems, Fourth Edition 3 Overview Overview UNIX and Linux share three major advantages : Portable from large systems to small systems Written in a high-level language, C Powerful utilities Brief, single-operation commands can be combined in a single command line to achieve any desired result Device independent Device drivers are included as part of the operating system, and not as part of devices
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Understanding Operating Systems, Fourth Edition 4 Overview Overview Disadvanatges: No single standardized version of operating system in UNIX Both have very brief, cryptic commands Novice users find unfriendly Both UNIX and Linux are case-sensitive and strongly oriented toward lower-case characters
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Understanding Operating Systems, Fourth Edition 5 The Evolution of UNIX The Evolution of UNIX Table 15.1: Evolution of UNIX
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Understanding Operating Systems, Fourth Edition 6 The Evolution of UNIX The Evolution of UNIX (continued) (continued) Table 15.1 (continued): Evolution of UNIX
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Understanding Operating Systems, Fourth Edition 7 The Evolution of UNIX The Evolution of UNIX (continued) (continued) Table 15.1 (continued): Evolution of UNIX
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Understanding Operating Systems, Fourth Edition 8 The Evolution of UNIX The Evolution of UNIX (continued) (continued) New releases of UNIX include following features: Full support for local area networks Complies with international operating system standards Greatly improved system security Meets many security requirements Most feature Common Desktop Environment (CDE) which is a uniform GUI Challenge: To standardize to improve portability of programs from one system to another Release of ISO/IEC 9945:2003 is big step
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Understanding Operating Systems, Fourth Edition 9 The Evolution of Linux The Evolution of Linux Linux is a contraction of Linus and UNIX Based on a powerful multiplatform operating system, UNIX Brought speed, efficiency , and flexibility of UNIX to PC environment Linux is an open-source program Has Windows-like graphical user interfaces
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Understanding Operating Systems, Fourth Edition 10 The Evolution of Linux The Evolution of Linux (continued) (continued) Table 15.2: Major releases of Linux by Red Hat, Inc.
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Understanding Operating Systems, Fourth Edition 11 The Evolution of Linux The Evolution of Linux (continued) (continued) Table 15.2 (continued): Major releases of Linux by Red Hat, Inc.
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ch15 - Chapter 15 UNIX and Linux Operating Systems...

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