Chapter 1: OS overview
... Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing ...
... Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing ...
Open Source
... It runs on a wider range of hardware platforms and run on less expensive and powerful systems. Linux exceeds other operating systems in its multiprocessing capabilities and its support of advanced TCP/IP networking facilities ...
... It runs on a wider range of hardware platforms and run on less expensive and powerful systems. Linux exceeds other operating systems in its multiprocessing capabilities and its support of advanced TCP/IP networking facilities ...
ch18
... First developed as a small but self-contained kernel in 1991 by Linus Torvalds, with the major design goal of UNIX compatibility, released as open source ...
... First developed as a small but self-contained kernel in 1991 by Linus Torvalds, with the major design goal of UNIX compatibility, released as open source ...
Lecture 15 - Department of Math and Computer Science
... * silly_copy - utterly worthless syscall that copies the len bytes from * 'src' to 'dst' using the kernel as an intermediary in the copy for no * good reason. But it i makes for a good example! ...
... * silly_copy - utterly worthless syscall that copies the len bytes from * 'src' to 'dst' using the kernel as an intermediary in the copy for no * good reason. But it i makes for a good example! ...
Commercial Real-Time Operating Systems
... Unix was originally developed by AT&T Bell Labs. Since AT&T was primarily a telecommunication company, it felt that Unix was not commercially important for it. Therefore, it distributed Unix source code free of cost to several universities. UCB (University of California at Berkeley) was one of the e ...
... Unix was originally developed by AT&T Bell Labs. Since AT&T was primarily a telecommunication company, it felt that Unix was not commercially important for it. Therefore, it distributed Unix source code free of cost to several universities. UCB (University of California at Berkeley) was one of the e ...
Processes and Threads
... instructions) and data (information manipulated by these instructions) that together describe a computation ...
... instructions) and data (information manipulated by these instructions) that together describe a computation ...
Lecture #19: Storage Management
... Performance depends on the number and types of requests. Requests for disk service can be influenced by the file-allocation method. The disk-scheduling algorithm should be written as a separate module of ...
... Performance depends on the number and types of requests. Requests for disk service can be influenced by the file-allocation method. The disk-scheduling algorithm should be written as a separate module of ...
Specialized Execution Environments
... Virtualization has become popular (again) as a means of consolidating multiple operating systems (OSes) onto a smaller set of hardware resources. The roles of OSes in such environments have changed. Whereas normally an OS provides balance between the demands of application and hardware support, in t ...
... Virtualization has become popular (again) as a means of consolidating multiple operating systems (OSes) onto a smaller set of hardware resources. The roles of OSes in such environments have changed. Whereas normally an OS provides balance between the demands of application and hardware support, in t ...
- Saraswathi Velu College of Engineering
... 5.Differentiate Tightly coupled systems and loosely coupled systems? Loosely coupled systems Tightly coupled systems Each processor has its own local memory Common memory is shared by many processors Each processor can communicate with other all through communication lines No need of any special com ...
... 5.Differentiate Tightly coupled systems and loosely coupled systems? Loosely coupled systems Tightly coupled systems Each processor has its own local memory Common memory is shared by many processors Each processor can communicate with other all through communication lines No need of any special com ...
ppt
... – System extension via dynamically loaded kernel modules • Environment Variables – System variables such as LIBPATH that are shared state across applications. An attacker can change LIBPATH to load an attackerprovided file as a dynamic library ...
... – System extension via dynamically loaded kernel modules • Environment Variables – System variables such as LIBPATH that are shared state across applications. An attacker can change LIBPATH to load an attackerprovided file as a dynamic library ...
Exception Handling and System Calls
... call from register [2]. (All the codes are defined in syscall.h). It then executes the code corresponding to that system call. For example, in the case of halt, it simply halts the machine. ...
... call from register [2]. (All the codes are defined in syscall.h). It then executes the code corresponding to that system call. For example, in the case of halt, it simply halts the machine. ...
Chapter 21: Case Study: Windows XP
... NTOS executive layer contains the services such as management services for virtual memory, cache, I/O etc. HAL (Hardware Abstraction Layer) Interacts with hardware, drives device components on main board Abstracts hardware specifics that differ between systems of the same architecture (such as d ...
... NTOS executive layer contains the services such as management services for virtual memory, cache, I/O etc. HAL (Hardware Abstraction Layer) Interacts with hardware, drives device components on main board Abstracts hardware specifics that differ between systems of the same architecture (such as d ...
SCADA Systems
... System of Technological Process we need control bodies of different types similar to conventionally used: buttons, switches, shifting and rotating regulators. We need also screen forms process parameters indicators of different types: arrows-based, shift-based, digital indicators, and also alerting ...
... System of Technological Process we need control bodies of different types similar to conventionally used: buttons, switches, shifting and rotating regulators. We need also screen forms process parameters indicators of different types: arrows-based, shift-based, digital indicators, and also alerting ...
Device Drivers: Their Function in an Operating System
... between a personal digital assistant and a printer to allow a document to be printed. Jini does not actually download the services themselves. Instead, it downloads an interface through which a device can interact with the services (Cravotta, 2000). I/O drivers with some operating systems, such as L ...
... between a personal digital assistant and a printer to allow a document to be printed. Jini does not actually download the services themselves. Instead, it downloads an interface through which a device can interact with the services (Cravotta, 2000). I/O drivers with some operating systems, such as L ...
Test Bank Chapter Three (Operating Systems)
... A storage system in which the first entry in is the first entry out Extended storage space created by the memory manager ...
... A storage system in which the first entry in is the first entry out Extended storage space created by the memory manager ...
2-Operating-System Structures
... File-system manipulation - The file system is of particular interest. Programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. ...
... File-system manipulation - The file system is of particular interest. Programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. ...
Blue Background
... by the Free Software Foundation. Linux is copyrighted and it is not public domain. However, a GNU Public Licence has much the same effect as being in the public domain. The licence is designed to ensure that Linux remains free, and at the same time standardised. There is only one official Linux. Aca ...
... by the Free Software Foundation. Linux is copyrighted and it is not public domain. However, a GNU Public Licence has much the same effect as being in the public domain. The licence is designed to ensure that Linux remains free, and at the same time standardised. There is only one official Linux. Aca ...
Windows Server 2008
... • An OS handles input and output device communications through device drivers (software) and hardware such as adapter boards • Device drivers are often provided with an OS, but the most up-todate device drivers come directly form each device manufacturer • Manufacturer device and device driver insta ...
... • An OS handles input and output device communications through device drivers (software) and hardware such as adapter boards • Device drivers are often provided with an OS, but the most up-todate device drivers come directly form each device manufacturer • Manufacturer device and device driver insta ...
Operating Systems
... Security Services • Security systems must control vulnerabilities that lead to system failures such as incorrect data, erased disks, loss of confidentiality, denial of ...
... Security Services • Security systems must control vulnerabilities that lead to system failures such as incorrect data, erased disks, loss of confidentiality, denial of ...
Operating system
... from the keyboard, mouse, and any other input device and the output is to the user interface. It also manages interaction with the sound driver, timer, and communications ports. • Kernel. The Kernel provides for core operating system components including file I/O services, virtual memory management, ...
... from the keyboard, mouse, and any other input device and the output is to the user interface. It also manages interaction with the sound driver, timer, and communications ports. • Kernel. The Kernel provides for core operating system components including file I/O services, virtual memory management, ...
Operating System Security (II)
... In UNIX, a File Control Block is called an i-node (“indexnode”) each file has a corresponding i-node structure, which contains information describing the file on-disk i-node (file system dependent) • persistent accounting information: user & group ownership, time stamps, etc. • information to lo ...
... In UNIX, a File Control Block is called an i-node (“indexnode”) each file has a corresponding i-node structure, which contains information describing the file on-disk i-node (file system dependent) • persistent accounting information: user & group ownership, time stamps, etc. • information to lo ...
Operating system structures
... Apple Mac OS X as “Aqua” GUI interface with UNIX kernel underneath and shells available ...
... Apple Mac OS X as “Aqua” GUI interface with UNIX kernel underneath and shells available ...
Plan 9 from Bell Labs
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.