etc system and network configuration 118
UNIX System Administration phần 1 pps
... 52 Miscellaneous useful commands 53 Log files 54 System Directories 115 / - root 115 /etc - system and network configuration .118 © 1998 University Technology ... and hardware for the system This includes hardware configuration, software installation, reconfiguration of the kernel, networking, and anything else that’s required to make the system work and ... file systems, devices, and network services You need to manage disk space usage, tape and CDROM devices and network services to make sure that these resources are available 1.3 Startup and Shutdown...
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A computer system consists of hardware, system programs, and application programs figs 1
... Banking system Airline reservation Web browser Compilers Editors Command interpreter Application programs System programs Operating system Machine language Microarchitecture ... Physical devices Fig 1-1 A computer system consists of hardware, system programs, and application programs Card reader Tape drive Input tape Output tape Printer 1401 (a) System tape (b) 7094 (c) (d) ... Some of the components of a simple personal computer Execute unit Fetch unit Fetch unit Decode unit Holding buffer Execute unit Fetch unit (a) Decode unit Decode unit Execute unit Execute unit (b)...
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A computer system consists of hardware, system programs, and application programs figs 2
... Processes n–2 n–1 Scheduler Fig 2-3 The lowest layer of a process-structured operating system handles interrupts and scheduling Above that layer are sequential processes Process management Registers ... Finite-state machine Characteristics Parallelism, blocking system calls No parallelism, blocking system calls Parallelism, nonblocking system calls, interrupts Fig 2-12 Three ways to construct ... process All systems Fairness - giving each process a fair share of the CPU Policy enforcement - seeing that stated policy is carried out Balance - keeping all parts of the system busy Batch systems...
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A computer system consists of hardware, system programs, and application programs figs 3
... (m) (n) A B C A B C A B C R S T R S T R S T (o) (p) (q) Fig 3-4 An example of how deadlock occurs and how it can be avoided R A B C S D F U W G (a) T E D V U R E V G (b) Fig 3-5 (a) A resource ... Fig 3-13 (a) Numerically ordered resources (b) A resource graph Condition Mutual exclusion Hold and wait No preemption Circular wait Approach Spool everything Request all resources initially Take...
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A computer system consists of hardware, system programs, and application programs figs 4
... Time C B C C B B C C B A A A A D D D Operating system Operating system Operating system Operating system Operating system Operating system Operating system (a) (b) (c) (d) (e) (f) (g) Fig 4-5 Memory ... Operating system in ROM User program User program User program Operating system in RAM Operating system in RAM (a) (b) (c) Fig 4-1 Three simple ways of organizing memory with an operating system and ... physical memory To allow programs and data to be broken up into logically independent address spaces and to aid sharing and protection Fig 4-37 Comparison of paging and segmentation ; ;; ; ;;;;...
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A computer system consists of hardware, system programs, and application programs figs 5
... Operating system Disk driver Printer driver Keyboard driver (a) Operating system Disk driver Printer driver Keyboard driver (b) Fig 5-13 (a) Without a standard driver interface (b) With a standard ... memory space (b) Memory-mapped I/O (c) Hybrid CPU reads and writes of memory go over this high-bandwidth bus CPU Memory All addresses (memory and I/O) go here (a) I/O CPU Memory I/O This memory port ... executed when the print system call is made (b) Interrupt service procedure User-level I/O software Device-independent operating system software Device drivers Interrupt handlers Hardware Fig 5-10...
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A computer system consists of hardware, system programs, and application programs figs 6
... within each record Number of bytes in the key field Date and time the file was created Date and time the file was last accessed Date and time the file has last changed Number of bytes in the ... one segment and creating a new segment for file xyz Root directory A A B C Fig 6-7 A single-level directory system containing four files, owned by three different people, A, B, and C Root directory ... directory system The letters indicate the owners of the directories and files Root directory User directory A A B B B C B B C C C C User subdirectories C C Fig 6-9 A hierarchical directory system...
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A computer system consists of hardware, system programs, and application programs figs 7
... box House Distribution network Video server Copper twisted pair (a) Fiber Junction box Distribution network Video server Cable TV coaxial cable (b) Fig 7-1 Video on demand using different local ... multimedia and high-performance I/O devices Note that Mbps is 106 bits/sec but GB is 230 bytes Frame English subtitles Hello, Bob Hello, Alice Nice day Sure is How are you Great And you Good ... Uncompressed TV (640 × 480) 221 Uncompressed HDTV (1280 × 720)648 Device Fast Ethernet EIDE disk ATM OC-3 network SCSI UltraWide disk IEEE 1394 (FireWire) Gigabit Ethernet SCSI Ultra-160 disk GB/hr 0.03...
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A computer system consists of hardware, system programs, and application programs figs 8
... Run-time system Run-time system Run-time system Run-time system Run-time system Run-time system Operating system Operating system Operating system Operating system Operating system Operating system ... directories and the circles are files (b) A system in which all clients have the same view of the file system (c) A system in which different clients may have different views of the file system Client ... loaded node to hand off processes to (b) An empty node looking for work to ? Item Node configuration Node peripherals Location Internode communication Operating systems File systems Administration...
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A computer system consists of hardware, system programs, and application programs figs 9
... readable output Mandatory access control Subject sensitivity labels Device labels Accountability Identification and authentication Audit Trusted path Assurance System architecture System integrity ... the interrupt and trap vectors (b) After the operating system has retaken the printer interrupt vector (c) After the virus has noticed the loss of the printer interrupt vector and recaptured ... the end (d) With a virus spread over free space within the program Operating system Operating system Operating system Virus Virus Virus Sys call traps Disk vector Clock vector Printer vector...
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A computer system consists of hardware, system programs, and application programs figs 10
... Users Library interface System call interface Standards utility programs (shell, editors, compliers etc) Standard library (open, close, read, write, fork, etc) UNIX operating system (process management, ... write, and execute Owner and group can read, write, and execute Owner can read and write; group can read Owner can read and write; all others can read Owner can everything, rest can read and execute ... UNIX utility programs required by POSIX System calls Interrupts and traps Sockets File naming Map- Page ping faults Cooked tty Network protocols File systems Virtual memory Line disciplines Routing...
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A computer system consists of hardware, system programs, and application programs figs 11
... Stacks, data, etc Stacks, data, etc Stacks, data, etc HAL + OS HAL + OS HAL + OS System data System data System data Process A's private code and data Process B's private code and data Process ... boxes Painting and drawing Text Bitmaps and icons Colors and palettes The clipboard Input Description Create, destroy, and manage windows, Create, destroy, and append to menus and menu bars Pop ... as semaphores, mutexes, etc Arcname Partition names discovered by the boot loader NLS National language support objects FileSystem File system driver objects and file system recognizer objects...
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A computer system consists of hardware, system programs, and application programs figs 12
... Event-driven code Layer System call handler File system File system m Virtual memory Driver Driver Driver n Threads, thread scheduling, thread synchronization Interrupt handling, context switching, ... Performs the architectural design and writes the code Helps the chief programmer and serves as a sounding board Manages the people, budget, space, equipment, reporting, etc Edits the documentation, ... documentation, which must be written by the chief programmer The administrator and editor each need a secretary Maintains the code and documentation archives Provides any tools the chief programmer needs...
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Sources of Weapon System Cost Growth - Analysis of 35 Major Defense Acquisition Programs pot
... (2004), Wandland and Wickman (1993), Tyson, Nelson, and Utech (1992), Shaw (1982), Tyson et al (1989), Asher and Maggelet (1984), and Drezner et al (1993) studied cost growth in weapon systems ... provided help and guidance for Air Force systems We are grateful to our RAND colleagues Jack Graser and Fred Timson and to AFCAA analyst John Fitch for carefully reviewing the draft manuscript and suggesting ... development cost, and production costs; and presents a quantitative analysis of historical data on engine development schedule and cost • Test and Evaluation Trends and Costs for Aircraft and Guided...
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AN1264 integrating microchip libraries with a real time operating system
... headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India The Company’s quality system processes and procedures ... demand and also by government legislation that is mandating the introduction of smart energy meters into people's homes It is hoped that with the addition of meters that provide accurate and ... regulate the amount of energy that they use The demand for energy meters is being driven by users’ demand and also by government legislation mandating the introduction of smart energy meters into...
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EMBEDDED LINUX SYSTEM DESIGN AND DEVELOPMENT.pdf
... WinCE and Microsoft are registered trademarks and MS-DOS and DirectX are trademarks of Microsoft Corporation Ⅲ Solaris and Java are registered trademarks and ChorusOS is a trademark of Sun Microsystems, ... embedded system So building a xix xx Embedded Linux System Design and Development Linux-based embedded system does not stop with the OS but has to a lot with writing and building applications And ... Ⅲ Understand the embedded Linux development environment Ⅲ Understand and create Linux BSP for a hardware platform Ⅲ Understand the Linux model for embedded storage and write drivers and applications...
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Brand Identity System Design
... t Brand Identity System | 46 QUY CÁCH S P T SLOGAN Brand Identity System | 47 QUY CÁCH S P T SLOGAN Brand Identity System | 48 simple Brand Identity System | 49 trang trí Brand Identity System ... Nhí nh nh,… Brand Identity System | 18 Ý NGHĨA C A LOGO JUMBO Brand Identity System | 19 PHÁT TRI N LOGO JUMBO Brand Identity System | 20 PHÁT TRI N LOGO LENCII Brand Identity System | 21 Ý NGHĨA ... chuy n màu, nhi u màu, hi u ng d ng outline u quy nh Brand Identity System | 39 impact Brand Identity System | 40 typeface Brand Identity System | 41 QUY NH V VI C S TYPEFACE • D NG Ph i nh t...
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