ppt - Course Website Directory
... The low-level software which handles the interface to peripheral hardware, schedules tasks, allocates storage, and presents a default interface to the user when no application program is running. The OS may be split into a kernel which is always present and various system programs which use faciliti ...
... The low-level software which handles the interface to peripheral hardware, schedules tasks, allocates storage, and presents a default interface to the user when no application program is running. The OS may be split into a kernel which is always present and various system programs which use faciliti ...
Operating Systems and File Management Learning Steps LAP CC
... 3. A(n) ____________________ backup makes copies of only those files that have changed since your last full backup. 4. A(n) _______________________ point is essentially a backup of the settings in the Window Registry. 5. A bare- _____________________________ restore includes the operating system, bo ...
... 3. A(n) ____________________ backup makes copies of only those files that have changed since your last full backup. 4. A(n) _______________________ point is essentially a backup of the settings in the Window Registry. 5. A bare- _____________________________ restore includes the operating system, bo ...
Directories
... • The major device number tells the kernel which driver the file refers to, and the minor device number typically tells the driver which physical unit to address. ...
... • The major device number tells the kernel which driver the file refers to, and the minor device number typically tells the driver which physical unit to address. ...
Abstract View of System Components
... it seeks the next “control statement” from the user’s keyboard. • On-line system must be available for users to access data and code. ...
... it seeks the next “control statement” from the user’s keyboard. • On-line system must be available for users to access data and code. ...
System Call - KOVAN Research Lab
... Kernel only knows how to perform lowest-level hardware operations Device drivers, filesystems, virtual memory, etc. all implemented on top Use inter-process procedure call (IPC) to communicate between applications and servers ...
... Kernel only knows how to perform lowest-level hardware operations Device drivers, filesystems, virtual memory, etc. all implemented on top Use inter-process procedure call (IPC) to communicate between applications and servers ...
Chapter 3: Operating-System Structures • System Components
... except size, called minidisks in IBM’s VM. The sum of the sizes of all minidisks must be less than the actual amount of physical disk space available. Operating System Concepts ...
... except size, called minidisks in IBM’s VM. The sum of the sizes of all minidisks must be less than the actual amount of physical disk space available. Operating System Concepts ...
Overview of the Program Slides
... Distributed Shared Memory • “Simultaneous” read/write access by spatially distributed processors • Abstraction layer of an implementation built from message passing primitives • Semantics not so clean ...
... Distributed Shared Memory • “Simultaneous” read/write access by spatially distributed processors • Abstraction layer of an implementation built from message passing primitives • Semantics not so clean ...
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... ages when all computers were shared), interactive (as opposed to “batch”), and multi-tasking (sharing again). ...
... ages when all computers were shared), interactive (as opposed to “batch”), and multi-tasking (sharing again). ...
Course Introduction - Department of Computer Science
... E81 CSE 522S - Advanced Operating Systems ...
... E81 CSE 522S - Advanced Operating Systems ...
the user program.
... starting address,… • The kernel has several key components: – Device drivers are the hardware units managers; they hide the low level details. – File sys manager is the code that organises the data storage into files and directories, hiding low level details re disk blocks, for example. – Process ma ...
... starting address,… • The kernel has several key components: – Device drivers are the hardware units managers; they hide the low level details. – File sys manager is the code that organises the data storage into files and directories, hiding low level details re disk blocks, for example. – Process ma ...
lecture2
... The UNIX operating system was conceived and implemented in 1960 and first released in 1970. Its portability and availability caused it to the widely adopted and modified by academic institutions and businesses. In 1983, Richard Stallman started the GNU project with the goal of creating a free UNIX l ...
... The UNIX operating system was conceived and implemented in 1960 and first released in 1970. Its portability and availability caused it to the widely adopted and modified by academic institutions and businesses. In 1983, Richard Stallman started the GNU project with the goal of creating a free UNIX l ...
Distributed Computing Systems
... Andrew Tanenbaum and Marten van Steen, Distributed Systems – Principles and Paradigms, Prentice Hall, c2002. ...
... Andrew Tanenbaum and Marten van Steen, Distributed Systems – Principles and Paradigms, Prentice Hall, c2002. ...
1.1 What is an Operating System?
... controller informs the CPU that it has finished its operation. It accomplishes this communication by causing an interrupt. When the CPU is interrupted, it stops what it is doing and transfers execution to a fixed location. The fixed location usually contains the starting address where the service ro ...
... controller informs the CPU that it has finished its operation. It accomplishes this communication by causing an interrupt. When the CPU is interrupted, it stops what it is doing and transfers execution to a fixed location. The fixed location usually contains the starting address where the service ro ...
Language Based Operating Systems
... that is compiled to some intermediate language for execution or interpretation by a VM. Such languages are usually very high level (abstract) and provide expressive features. ...
... that is compiled to some intermediate language for execution or interpretation by a VM. Such languages are usually very high level (abstract) and provide expressive features. ...
Lab_1.pdf
... Dual booting -- The best Linux distros make dual booting a simple affair, along with the required disk partitioning (so you don't need to buy partitioning software). Installation -- installing Windows from scratch takes hours by the time you get all your apps up and running. With Linux, it can take ...
... Dual booting -- The best Linux distros make dual booting a simple affair, along with the required disk partitioning (so you don't need to buy partitioning software). Installation -- installing Windows from scratch takes hours by the time you get all your apps up and running. With Linux, it can take ...
Operating Systems Principles Lecture 1: Introduction
... The Third Generation (1965–1980) ICs and Multiprogramming Time Sharing Technique A variant of multiprogramming technique. Each user has an on-line terminal. Because the user is present and interacting with the computer, the computer system must respond quickly to user requests, otherwise us ...
... The Third Generation (1965–1980) ICs and Multiprogramming Time Sharing Technique A variant of multiprogramming technique. Each user has an on-line terminal. Because the user is present and interacting with the computer, the computer system must respond quickly to user requests, otherwise us ...
Chapter 9 Linux Installation Procedures
... password, and then an option to create user accounts that are to be added to the system. • If there is only one user, (the administrator), a separate user account should also be created. ...
... password, and then an option to create user accounts that are to be added to the system. • If there is only one user, (the administrator), a separate user account should also be created. ...
UNICOS, FORTRAN 90, NQS
... • Shells - A shell provides an interface between the user and the kernel. The shell interprets commands and command options entered at the command-line prompt and initiates the appropriate actions in the kernel. – UNICOS supports two shells: • The Korn shell (default) • The C shell ...
... • Shells - A shell provides an interface between the user and the kernel. The shell interprets commands and command options entered at the command-line prompt and initiates the appropriate actions in the kernel. – UNICOS supports two shells: • The Korn shell (default) • The C shell ...
gst_115_9
... Up until now we've been happily communicating using the media access control address assigned to our networking devices. Our systems have used this number to contact other systems and transmit information as required. The problem with this scheme is that it does not scale very well. For example, wha ...
... Up until now we've been happily communicating using the media access control address assigned to our networking devices. Our systems have used this number to contact other systems and transmit information as required. The problem with this scheme is that it does not scale very well. For example, wha ...
An operating system - Bilkent University Computer Engineering
... – Huge range, including denial-of-service, worms, viruses, identity theft, theft of service Systems generally first distinguish among users, to determine who can do what – User identities (user IDs, security IDs) include name and associated number, one per user – User ID then associated with all fil ...
... – Huge range, including denial-of-service, worms, viruses, identity theft, theft of service Systems generally first distinguish among users, to determine who can do what – User identities (user IDs, security IDs) include name and associated number, one per user – User ID then associated with all fil ...
Introduction to Operating Systems
... Main Memory is an array of addressable words or bytes that is quickly accessible. Main Memory is volatile. OS is responsible for: Allocate and deallocate memory to processes. Managing multiple processes within memory - keep track of which parts of memory are used by which processes. Manage t ...
... Main Memory is an array of addressable words or bytes that is quickly accessible. Main Memory is volatile. OS is responsible for: Allocate and deallocate memory to processes. Managing multiple processes within memory - keep track of which parts of memory are used by which processes. Manage t ...
CS 620 Comparative Operating Systems Interfaces
... must wait for his job to finish before he sees the output. ...
... must wait for his job to finish before he sees the output. ...
CS 620 Comparative Operating Systems Interfaces
... must wait for his job to finish before he sees the output. ...
... must wait for his job to finish before he sees the output. ...
Unix File System
... Ext2fs does not use fragments; it performs its allocations in smaller units: The default block size on ext2fs is 1Kb, although 2Kb and 4Kb blocks are also supported. ...
... Ext2fs does not use fragments; it performs its allocations in smaller units: The default block size on ext2fs is 1Kb, although 2Kb and 4Kb blocks are also supported. ...
Plan 9 from Bell Labs
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Plan 9 from Bell Labs is a distributed operating system, originally developed by the Computing Sciences Research Center at Bell Labs between the mid-1980s and 2002. It takes some of the principles of Unix, developed in the same research group, but extends these to a networked environment with graphics terminals.In Plan 9, virtually all computing resources, including files, network connections, and peripheral devices, are represented through the file system rather than specialized interfaces. A unified network protocol called 9P ties a network of computers running Plan 9 together, allowing them to share all resources so represented.The name Plan 9 from Bell Labs is a reference to the Ed Wood 1959 cult science fiction Z-movie Plan 9 from Outer Space. Also, Glenda, the Plan 9 Bunny, is presumably a reference to Wood's film Glen or Glenda. The system continues to be used and developed by operating system researchers and hobbyists.