Advanced Operating Systems (CS 202) OS Evolution
... • Many many fundamental ideas: protection rings, hierarchical file systems, devices as files, … ...
... • Many many fundamental ideas: protection rings, hierarchical file systems, devices as files, … ...
No Slide Title
... “Naked machine” Hardware without any helpful user-oriented features Extremely difficult for a human to work with ...
... “Naked machine” Hardware without any helpful user-oriented features Extremely difficult for a human to work with ...
Slides About Systems - Duke Database Devils
... Large, long-lived software systems are like buildings. They are built by workers using standard design patterns. They depend on some underlying infrastructure. But they can evolve and are not limited by the laws of physics. ...
... Large, long-lived software systems are like buildings. They are built by workers using standard design patterns. They depend on some underlying infrastructure. But they can evolve and are not limited by the laws of physics. ...
1.2 Operating System Structure
... • To overcome the issue of monolithic architecture by grouping components that performs similar functions into layers • Each layer communicates with those above and below it. • Lower-level layers provide services to higher-level layer using interfaces that hide their implementation • Layer OS are mo ...
... • To overcome the issue of monolithic architecture by grouping components that performs similar functions into layers • Each layer communicates with those above and below it. • Lower-level layers provide services to higher-level layer using interfaces that hide their implementation • Layer OS are mo ...
lec1
... An entity that can be assigned to and executed on a processes, It is a unit of work. Multiprogramming, time-sharing and real-time transaction systems lead to the refinement of the concept of process. A process can be defined by its attributes and behaviors : it can be viewed as an Abstract Data Type ...
... An entity that can be assigned to and executed on a processes, It is a unit of work. Multiprogramming, time-sharing and real-time transaction systems lead to the refinement of the concept of process. A process can be defined by its attributes and behaviors : it can be viewed as an Abstract Data Type ...
Module 3: Operating
... • The program that reads and interprets control statements is called variously: – control-card interpreter – command-line interpreter – shell (in UNIX) Its function is to get and execute the next command statement. Operating System Services • Program execution – system capability to load a program i ...
... • The program that reads and interprets control statements is called variously: – control-card interpreter – command-line interpreter – shell (in UNIX) Its function is to get and execute the next command statement. Operating System Services • Program execution – system capability to load a program i ...
1. design principle
... driven shells that make it easier for programmers to use. The shell function remains the same it acts as an interpreter between user and computer. The shell also provides the functionality “pipes” where by a number of commands can be linked together by user. Tools and Applications: There are hundred ...
... driven shells that make it easier for programmers to use. The shell function remains the same it acts as an interpreter between user and computer. The shell also provides the functionality “pipes” where by a number of commands can be linked together by user. Tools and Applications: There are hundred ...
Unix Commands
... currently working • The directory that represents your personal section of the server is called your home directory ...
... currently working • The directory that represents your personal section of the server is called your home directory ...
Lec1 Intro
... improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
... improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
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. ...
operating system
... The OS maintains additional information about running programs (location in memory, stack pointer, program counter). When a program is run, the operating system converts it into a process. It is the process, rather than the simple program, that the processor executes. ...
... The OS maintains additional information about running programs (location in memory, stack pointer, program counter). When a program is run, the operating system converts it into a process. It is the process, rather than the simple program, that the processor executes. ...
Unix Basics - Computer Science
... Shell can control the file descriptors of its children (redirection) This is a very powerful feature of UNIX, as it means the shell can make a process read/write different things without modifying the program, e.g. files, devices, another process. ...
... Shell can control the file descriptors of its children (redirection) This is a very powerful feature of UNIX, as it means the shell can make a process read/write different things without modifying the program, e.g. files, devices, another process. ...
Chapter 2: Attackers and Their Attacks
... Operating systems are intended to be dynamic As users’ needs change, new hardware is introduced, and more sophisticated attacks are unleashed, operating systems must be updated on a regular basis However, vendors release a new version of an operating system every two to four years Vendors use certai ...
... Operating systems are intended to be dynamic As users’ needs change, new hardware is introduced, and more sophisticated attacks are unleashed, operating systems must be updated on a regular basis However, vendors release a new version of an operating system every two to four years Vendors use certai ...
Understanding and Installing Firewalls
... known as an application layer firewall. Marcus Ranum's work on the technology spearheaded the creation of the first commercial product. The product was released by DEC who named it the DEC SEAL product. DEC’s first major sale was on June 13, 1991 to a chemical company based on the East Coast of the ...
... known as an application layer firewall. Marcus Ranum's work on the technology spearheaded the creation of the first commercial product. The product was released by DEC who named it the DEC SEAL product. DEC’s first major sale was on June 13, 1991 to a chemical company based on the East Coast of the ...
PowerPoint XP
... computers with networks OS design goal: ease of resource sharing among machines ...
... computers with networks OS design goal: ease of resource sharing among machines ...
CS307-slides13
... coherent directory tree; only previously mounted remote directories can be accessed transparently Total integration of the component file systems ...
... coherent directory tree; only previously mounted remote directories can be accessed transparently Total integration of the component file systems ...
Mullvad Barnprogram
... Mullvad Barnprogram - A virtual private network (VPN) extends a private network across a public network, such as the Internet. It enables a computer or network-enabled device to send and receive data across shared or public networks as if it were directly connected to the private network, while bene ...
... Mullvad Barnprogram - A virtual private network (VPN) extends a private network across a public network, such as the Internet. It enables a computer or network-enabled device to send and receive data across shared or public networks as if it were directly connected to the private network, while bene ...
Chapter 1 PowerPoint
... users to resources defined by the OS • Security: defense of the system against internal and external attacks – 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 i ...
... users to resources defined by the OS • Security: defense of the system against internal and external attacks – 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 i ...
Computer Science 4302 - Angelo State University
... The student will learn how the file, mass storage, and I/O are handled in a modern computer system. The file system provides the mechanism for on-line storage of and access to both data and programs. The student will explore the classic internal algorithms and structures of storage management and wi ...
... The student will learn how the file, mass storage, and I/O are handled in a modern computer system. The file system provides the mechanism for on-line storage of and access to both data and programs. The student will explore the classic internal algorithms and structures of storage management and wi ...
Document
... jobs running at the same time. (resources like CPU time, main memory, file storage etc) – Accounting – keep track of which users use how many and which kinds of computer resources for account billing or for accumulating usage statistics – Protection – ensuring that all access to system resources is ...
... jobs running at the same time. (resources like CPU time, main memory, file storage etc) – Accounting – keep track of which users use how many and which kinds of computer resources for account billing or for accumulating usage statistics – Protection – ensuring that all access to system resources is ...
Chapter 1: Introduction
... We can achieve protection by restricting what this program can access (define and enforce the address space. A memory management unit (MMU) converts “virtual or logical” addresses generated by the CPU from instructions, to physical addresses (which go in the memory address register (MAR) ). A contig ...
... We can achieve protection by restricting what this program can access (define and enforce the address space. A memory management unit (MMU) converts “virtual or logical” addresses generated by the CPU from instructions, to physical addresses (which go in the memory address register (MAR) ). A contig ...
Exercises
... Answer: Mechanismand policymust be separate to ensure that systems are easy to modify. No two system installations are the same, so each installation may want to tune the operating system to suit its needs. With mechanism and policy separate, the policy may be changed at will while the mechanism sta ...
... Answer: Mechanismand policymust be separate to ensure that systems are easy to modify. No two system installations are the same, so each installation may want to tune the operating system to suit its needs. With mechanism and policy separate, the policy may be changed at will while the mechanism sta ...
Maritime Cyber Vulnerabilities in the Energy Domain
... IT Systems • Shipboard computers are Linux based, and computers collect all the data into a storage center. – Inside database network server – Outside database network server via internet ...
... IT Systems • Shipboard computers are Linux based, and computers collect all the data into a storage center. – Inside database network server – Outside database network server via internet ...