Lecture 13
... • There is an on-disk structure pointing to disk blocks (and holding other information) • When file is opened, an in-memory structure is created • Not an exact copy of the disk version – The disk version points to disk blocks – The in-memory version points to RAM pages • Or indicates that the block ...
... • There is an on-disk structure pointing to disk blocks (and holding other information) • When file is opened, an in-memory structure is created • Not an exact copy of the disk version – The disk version points to disk blocks – The in-memory version points to RAM pages • Or indicates that the block ...
Operating-System - Jyoti Computer Centre
... c) Execution, interface, computer hardware, system d) None of the above 62) An operating system as resource manager, controls how…………….(the active agents) may access………(passive entities) one can view operating system from two points of views:…………. And …………… a) Resource, Process, Resource manager, Ex ...
... c) Execution, interface, computer hardware, system d) None of the above 62) An operating system as resource manager, controls how…………….(the active agents) may access………(passive entities) one can view operating system from two points of views:…………. And …………… a) Resource, Process, Resource manager, Ex ...
Course outline - Fiji National University | E
... I welcome you to this Unit and hope that you will find it enriching and interesting. This unit will introduce you to the management of Operating Systems offered by Computer Science and Information Systems for the Trade Diploma in Applied Computing programme. This unit is a core unit for the students ...
... I welcome you to this Unit and hope that you will find it enriching and interesting. This unit will introduce you to the management of Operating Systems offered by Computer Science and Information Systems for the Trade Diploma in Applied Computing programme. This unit is a core unit for the students ...
Quick UNIX Tutorial
... This implies that you may read files in the directory if you have read permission on the individual files. example: CS4315 ...
... This implies that you may read files in the directory if you have read permission on the individual files. example: CS4315 ...
ppt - Dave Reed
... only one process can be running in a uniprocessor system a running process may be forced to wait (e.g., for I/O or some other event) multiprocessing revolves around the system's ability to fill the waiting times of one process with the working times of another process scheduling is a fundamental ope ...
... only one process can be running in a uniprocessor system a running process may be forced to wait (e.g., for I/O or some other event) multiprocessing revolves around the system's ability to fill the waiting times of one process with the working times of another process scheduling is a fundamental ope ...
P 1 - Dave Reed
... only one process can be running in a uniprocessor system a running process may be forced to wait (e.g., for I/O or some other event) multiprocessing revolves around the system's ability to fill the waiting times of one process with the working times of another process scheduling is a fundamental ope ...
... only one process can be running in a uniprocessor system a running process may be forced to wait (e.g., for I/O or some other event) multiprocessing revolves around the system's ability to fill the waiting times of one process with the working times of another process scheduling is a fundamental ope ...
Preface
... Operating systems are an essential part of any computer system. Similarly, a course on operating systems is an essential part of any computer science education. This field is undergoing rapid change, as computers are now prevalent in virtually every arena of day-to-day life —from embedded devices in ...
... Operating systems are an essential part of any computer system. Similarly, a course on operating systems is an essential part of any computer science education. This field is undergoing rapid change, as computers are now prevalent in virtually every arena of day-to-day life —from embedded devices in ...
Windows booting procedure
... on computer and warm booting is the processes happening when we reset the computer. During the booting process the computer loads the operating system to its memory and prepares it for use. ...
... on computer and warm booting is the processes happening when we reset the computer. During the booting process the computer loads the operating system to its memory and prepares it for use. ...
TrustedOS - Radford University
... – Code to interact with users is often much more complex and much more dependent on the specific device hardware than code for any other component of the computing system. – User interactions are often character oriented. In the interest of fast data transfer, the operating systems designers may hav ...
... – Code to interact with users is often much more complex and much more dependent on the specific device hardware than code for any other component of the computing system. – User interactions are often character oriented. In the interest of fast data transfer, the operating systems designers may hav ...
Slides
... • Hardware abstraction – Generic interfaces hiding hardware details – Convenient abstractions, addressing common problems • Tasks, file system, unix pipes, ... ...
... • Hardware abstraction – Generic interfaces hiding hardware details – Convenient abstractions, addressing common problems • Tasks, file system, unix pipes, ... ...
AOSIOSystems - Prof. M. Saeed
... a computer program which depends heavily on some other computer (its server) to fulfill its traditional computational roles. This stands in contrast to the traditional fat client, a computer designed to take on these roles by itself. The exact roles assumed by the server may vary, from providing dat ...
... a computer program which depends heavily on some other computer (its server) to fulfill its traditional computational roles. This stands in contrast to the traditional fat client, a computer designed to take on these roles by itself. The exact roles assumed by the server may vary, from providing dat ...
Modern Operating System by Tanenbaum
... Question 19: A computer provides each process with 65,536 bytes of address space divided into pages of 4096 bytes. A particular program has a text size of 32,768 bytes, a data size of 16,386 bytes, and a stack size of 15,870 bytes. Will this program fit in the address space? If the page size were 51 ...
... Question 19: A computer provides each process with 65,536 bytes of address space divided into pages of 4096 bytes. A particular program has a text size of 32,768 bytes, a data size of 16,386 bytes, and a stack size of 15,870 bytes. Will this program fit in the address space? If the page size were 51 ...
Slides - Winlab
... • netstat – list connection – netstat –p (netstat –b on windows) tells you what process is associated with what port ...
... • netstat – list connection – netstat –p (netstat –b on windows) tells you what process is associated with what port ...
Operating Systems
... (CPU, memory, I/O devices). 2. Operating system – controls and coordinates the use of the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users (compilers, ...
... (CPU, memory, I/O devices). 2. Operating system – controls and coordinates the use of the hardware among the various application programs for the various users. 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users (compilers, ...
2-Operating-System Structures
... Chapter 2: Operating-System Structures Operating System Services User Operating System Interface System Calls Types of System Calls System Programs Operating System Design and Implementation Operating System Structure System Boot ...
... Chapter 2: Operating-System Structures Operating System Services User Operating System Interface System Calls Types of System Calls System Programs Operating System Design and Implementation Operating System Structure System Boot ...
the linux operating system
... made to any portion of a typical monolithic OS, all the modules and routines must be relinked and reinstalled and the system rebooted before the changes can take effect. As a result, any modification, such as adding a new device driver or file system function, is difficult. This problem is especiall ...
... made to any portion of a typical monolithic OS, all the modules and routines must be relinked and reinstalled and the system rebooted before the changes can take effect. As a result, any modification, such as adding a new device driver or file system function, is difficult. This problem is especiall ...
Multitasking and Time Slices
... available processor time among the processes or threads that need it. The system is designed for preemptive multitasking; it allocates a processor time slice to each thread it executes. The currently executing thread is suspended when its time slice elapses, allowing another thread to run. When the ...
... available processor time among the processes or threads that need it. The system is designed for preemptive multitasking; it allocates a processor time slice to each thread it executes. The currently executing thread is suspended when its time slice elapses, allowing another thread to run. When the ...
Operating System Architecture and Distributed Systems
... MK appears as a layer between H/W and system systems. If performance, rather than portability is goal, then middleware may use facilities of MK directly. ...
... MK appears as a layer between H/W and system systems. If performance, rather than portability is goal, then middleware may use facilities of MK directly. ...
Malware defenses (cont)
... – All or nothing access to parts of file system – Inappropriate for apps like a web browser • Needs read access to files outside jail (e.g. for sending attachments in Gmail) ...
... – All or nothing access to parts of file system – Inappropriate for apps like a web browser • Needs read access to files outside jail (e.g. for sending attachments in Gmail) ...
HistoryAndHardware
... I/O routine supplied by the system. Memory management – the system must allocate the ...
... I/O routine supplied by the system. Memory management – the system must allocate the ...
process
... The long term scheduler (admission scheduler) decides which jobs/processes are admitted in the “ready to execute” queue. When a program must run, its admission in the queue is authorized or delayed by the long term scheduler. In this way the scheduler decides which processes will run on a system and ...
... The long term scheduler (admission scheduler) decides which jobs/processes are admitted in the “ready to execute” queue. When a program must run, its admission in the queue is authorized or delayed by the long term scheduler. In this way the scheduler decides which processes will run on a system and ...
Operation Systems
... Process Manager: • Next program to be executed? • Time to be given to each program? Memory manager: • Best use of the memory to run as many programs as possible I/O Device (e.g.printer) Manager: • Which program should use a particular I/O device? Network manager: • which computer should execute a pa ...
... Process Manager: • Next program to be executed? • Time to be given to each program? Memory manager: • Best use of the memory to run as many programs as possible I/O Device (e.g.printer) Manager: • Which program should use a particular I/O device? Network manager: • which computer should execute a pa ...
Processes
... similar to multiprogramming: better CPU utilization by switching between processes more frequent switching so that users can interact with the program necessary for time-sharing system ...
... similar to multiprogramming: better CPU utilization by switching between processes more frequent switching so that users can interact with the program necessary for time-sharing system ...