Chapter 1: Welcome to Linux - Business and Computer Science
... • Jobs were submitted into a queue – Only one process at a time – scheduling nightmare ...
... • Jobs were submitted into a queue – Only one process at a time – scheduling nightmare ...
Unit OS1: The Evolution of Operating Systems
... Single user Multiuser/Timesharing Systems Management of multiple simultaneous users interconnected via terminals Fair resource management: CPU scheduling, spooling, mutual exclusion Real-Time Systems (process control systems) Management of time-critical processes High requirements with respect to re ...
... Single user Multiuser/Timesharing Systems Management of multiple simultaneous users interconnected via terminals Fair resource management: CPU scheduling, spooling, mutual exclusion Real-Time Systems (process control systems) Management of time-critical processes High requirements with respect to re ...
batch systems
... – A system has many resources: CPU time, memory, disk space, access to I/O devices – The OS is in charge of allocating these resources – Many possible policies: • allocate fairly; give more to those who pay more; give it all to me ...
... – A system has many resources: CPU time, memory, disk space, access to I/O devices – The OS is in charge of allocating these resources – Many possible policies: • allocate fairly; give more to those who pay more; give it all to me ...
09CS212 OPERATING SYSTEM Credits: 3:0:0 Course Objective: To
... 09CS212 OPERATING SYSTEM Credits: 3:0:0 Course Objective: To gain knowledge about the Operating Systems concepts such as process, main management, secondary memory management, CPU and disk scheduling etc. ...
... 09CS212 OPERATING SYSTEM Credits: 3:0:0 Course Objective: To gain knowledge about the Operating Systems concepts such as process, main management, secondary memory management, CPU and disk scheduling etc. ...
System Call - ShareCourse
... Protection involves ensuring that all access to system resources is controlled Security of the system from outsiders require user authentication, extends to defending external I/O devices from invalid access attempts If a system is to be protected and secure, precautions must be instituted throughou ...
... Protection involves ensuring that all access to system resources is controlled Security of the system from outsiders require user authentication, extends to defending external I/O devices from invalid access attempts If a system is to be protected and secure, precautions must be instituted throughou ...
Tutorail-two-with
... kept only where it is needed and is accessible only within a defined and restricted area, so any bugs affecting that data must be limited to a specific module or layer. ...
... kept only where it is needed and is accessible only within a defined and restricted area, so any bugs affecting that data must be limited to a specific module or layer. ...
1 - Erode Sengunthar Engineering College
... requires CPU scheduling scheme , job synchronization , job communication also jobs should not get stuck in deadlock. 6.Differentiate TCS & LCS ? LCS 1.Each processor has its own local memory 2.Each processor can communicate with other all through communication lines ...
... requires CPU scheduling scheme , job synchronization , job communication also jobs should not get stuck in deadlock. 6.Differentiate TCS & LCS ? LCS 1.Each processor has its own local memory 2.Each processor can communicate with other all through communication lines ...
powerpoint
... Issues in Operating Systems • structure - how is the OS organized? • sharing - how are resources shared among users? • naming - how are resources named by users or programs? • protection - how is one user/program ...
... Issues in Operating Systems • structure - how is the OS organized? • sharing - how are resources shared among users? • naming - how are resources named by users or programs? • protection - how is one user/program ...
Lecture 4: September 11 4.1 Processes 4.2 Memory and Secondary
... A process is an instance of a computer program that is being sequentially executed by a computer system that has the ability to run several computer programs concurrently. A computer program itself is just a passive collection of instructions, while a process is the actual execution of those instruc ...
... A process is an instance of a computer program that is being sequentially executed by a computer system that has the ability to run several computer programs concurrently. A computer program itself is just a passive collection of instructions, while a process is the actual execution of those instruc ...
The Linux System
... The programs perform the system calls by mean of trap. trap instruction: changes from user mode to kernel mode controls the correctness of the call parameters execution done on behalf of the operating system returns to user mode Since it is impossible to write a trap in C, it is provided a s ...
... The programs perform the system calls by mean of trap. trap instruction: changes from user mode to kernel mode controls the correctness of the call parameters execution done on behalf of the operating system returns to user mode Since it is impossible to write a trap in C, it is provided a s ...
Work with Files and Directories
... • Till UNIX came on scene, operating systems were designed with a particular machine in mind. Programs designed for one system simply wouldn’t run on another. • Ken Thompson and Dennis Ritchie designed and built a small system having an elegant file system, a command interpreter (the shell) and a se ...
... • Till UNIX came on scene, operating systems were designed with a particular machine in mind. Programs designed for one system simply wouldn’t run on another. • Ken Thompson and Dennis Ritchie designed and built a small system having an elegant file system, a command interpreter (the shell) and a se ...
Ch2 OS Structures 1
... – File‐system manipulation ‐ read and write files and directories, create and delete them, search them, list file Information, permission management. – Communications – Processes may exchange information, on the same computer or between computers over a network • via shared memory or through messa ...
... – File‐system manipulation ‐ read and write files and directories, create and delete them, search them, list file Information, permission management. – Communications – Processes may exchange information, on the same computer or between computers over a network • via shared memory or through messa ...
UNIX/LINUX
... BSD(Berkeley Software Distribution), Solaris (Sun Microsystems, and XENIX (Microsoft). ...
... BSD(Berkeley Software Distribution), Solaris (Sun Microsystems, and XENIX (Microsoft). ...
Concepts and Structures
... without regard to the amount that is physically available While a program is running only a portion of the program and data is kept in (real) memory Other portions are kept in blocks on disk The user has access to a memory space that is larger than real memory All memory references made by a program ...
... without regard to the amount that is physically available While a program is running only a portion of the program and data is kept in (real) memory Other portions are kept in blocks on disk The user has access to a memory space that is larger than real memory All memory references made by a program ...
Operating Systems
... It provides security by supporting access control and ownership privileges, meaning you can set permission for groups or individual users to access certain files. NTFS supports compression of individual files and folders which can be read and written to while they are ...
... It provides security by supporting access control and ownership privileges, meaning you can set permission for groups or individual users to access certain files. NTFS supports compression of individual files and folders which can be read and written to while they are ...
OS API
... Kernel can give the process fewer bytes, user process must check the byteCount to see how ...
... Kernel can give the process fewer bytes, user process must check the byteCount to see how ...
Slides. - Department of Computer Science and Information Systems
... 6. File systems 7. Multimedia operating systems 8. Multiple processor systems 9. Security UNIX and Windows are to be used as running case studies. ...
... 6. File systems 7. Multimedia operating systems 8. Multiple processor systems 9. Security UNIX and Windows are to be used as running case studies. ...
CS502 Course Introduction (Spring 2006)
... – “Design and develop an operating system to do THIS” (not probable) – “Select an operating system for a product that will do THAT” (probable) – “Design and develop this application on THAT system” (likely) CS502 Spring 2006 ...
... – “Design and develop an operating system to do THIS” (not probable) – “Select an operating system for a product that will do THAT” (probable) – “Design and develop this application on THAT system” (likely) CS502 Spring 2006 ...
2.4 The service and functions provided by an operating system can
... two main categories. Briefly describes the two categories and discuss how they differ. ANS: One class of services provided by an operating system is to enforce protection between different processes running concurrently in the system. Processes are allowed to access only those memory locations that ...
... two main categories. Briefly describes the two categories and discuss how they differ. ANS: One class of services provided by an operating system is to enforce protection between different processes running concurrently in the system. Processes are allowed to access only those memory locations that ...
Test 1 Operating Systems and Networking CS
... One of our lecture note slides on Computer Systems Overview declares: “[Operating System] provides a set of services to system users.” Who are these system users that OS attempts to provide service to? What type of “system services” do we anticipate that users must procure through OS? On the same sl ...
... One of our lecture note slides on Computer Systems Overview declares: “[Operating System] provides a set of services to system users.” Who are these system users that OS attempts to provide service to? What type of “system services” do we anticipate that users must procure through OS? On the same sl ...
Computers: Tools for an Information Age
... Describe the functions of an operating system Explain the basics of a personal computer operating system Describe the advantages of a graphical operating system Differentiate among different versions of Microsoft Windows Explain the need for network operating systems ...
... Describe the functions of an operating system Explain the basics of a personal computer operating system Describe the advantages of a graphical operating system Differentiate among different versions of Microsoft Windows Explain the need for network operating systems ...