Slide 1
... Creating a text file 1. Click Start and choose All Programs, Accessories, Notepad 2. Enter the desired text 3. Choose File, Save As 4. From the Save In list, select the desired directory 5. In the File Name box, type a name 6. Verify that Text Documents (*.txt) is selected in the Save as type box 7. ...
... Creating a text file 1. Click Start and choose All Programs, Accessories, Notepad 2. Enter the desired text 3. Choose File, Save As 4. From the Save In list, select the desired directory 5. In the File Name box, type a name 6. Verify that Text Documents (*.txt) is selected in the Save as type box 7. ...
introduction to unix system
... as world wide e-mail and connecting to the Internet. • Unix was founded on what could be called a "small is good" philosophy. The idea is that each program is designed to do one job well. Because Unix was developed by different people with different needs it has grown to an operating system that is ...
... as world wide e-mail and connecting to the Internet. • Unix was founded on what could be called a "small is good" philosophy. The idea is that each program is designed to do one job well. Because Unix was developed by different people with different needs it has grown to an operating system that is ...
unix intro
... • Displays documentation of commands, configuration files, system calls and library functions. • Organized in a number of sections. Commands are found in Section 1. • May need to use section number when entry exists in multiple sections (e.g. man passwd and man -s 5 passwd). • man documentation not ...
... • Displays documentation of commands, configuration files, system calls and library functions. • Organized in a number of sections. Commands are found in Section 1. • May need to use section number when entry exists in multiple sections (e.g. man passwd and man -s 5 passwd). • man documentation not ...
A Survey of Multiprocessor Operating System Kernels (DRAFT)
... Because a NUMA architecture allows a large number of processors in a single machine, many experimental, large-scale multiprocessors are NUMA machines, an example being the IBM RP3 which was designed to contain up to 512 processors [45, 44], and the KSR machine again offering up to 512 processors. NO ...
... Because a NUMA architecture allows a large number of processors in a single machine, many experimental, large-scale multiprocessors are NUMA machines, an example being the IBM RP3 which was designed to contain up to 512 processors [45, 44], and the KSR machine again offering up to 512 processors. NO ...
CS 112 Introduction to Programming - Zoo
... The error messages sometimes can be tough to understand: • Why can’t the computer just say “You misspelled ‘public’”? • Since the computer knows that a “;” is missing, can’t it just fix it?? ...
... The error messages sometimes can be tough to understand: • Why can’t the computer just say “You misspelled ‘public’”? • Since the computer knows that a “;” is missing, can’t it just fix it?? ...
File Management - Cal Poly computer science
... amounts of information must be stored on a permanent basis in the computer system convenient access to stored information is needed by the user files provide a convenient mechanism for storing closely related information items the file system helps with the organization and management of files ...
... amounts of information must be stored on a permanent basis in the computer system convenient access to stored information is needed by the user files provide a convenient mechanism for storing closely related information items the file system helps with the organization and management of files ...
introduction
... Abstraction is the key to managing complexity. Good abstractions turn a nearly impossible task into two manageable ones. The first one of these is defining and implementing the abstractions. The second one is using these abstractions to solve the problem at hand. One abstraction that almost every co ...
... Abstraction is the key to managing complexity. Good abstractions turn a nearly impossible task into two manageable ones. The first one of these is defining and implementing the abstractions. The second one is using these abstractions to solve the problem at hand. One abstraction that almost every co ...
Introduction
... User types: ‘grep some_word file_name’ Shell parses the command, inserts the strings grep, some_word, file_name into argv and their number to argc Next, the shell uses fork() to create a process (same user ID) Now, it takes the executable name grep and the arguments, all from argv, and uses ...
... User types: ‘grep some_word file_name’ Shell parses the command, inserts the strings grep, some_word, file_name into argv and their number to argc Next, the shell uses fork() to create a process (same user ID) Now, it takes the executable name grep and the arguments, all from argv, and uses ...
Operating Systems, 082
... file_name into argv and their number to argc Next, the shell uses fork() to create a process (same user ID) Now, it takes the executable name grep and the arguments, all from argv, and uses execvp() (or a similar system call) to run the grep executable On foreground execution, the shell would ...
... file_name into argv and their number to argc Next, the shell uses fork() to create a process (same user ID) Now, it takes the executable name grep and the arguments, all from argv, and uses execvp() (or a similar system call) to run the grep executable On foreground execution, the shell would ...
UNIX Notes:
... This concept may take a little getting used to before all that is means sets in. To log into a UNIX system your terminal must be described to the system. In the directory /dev the system device files (files that contain the hardware interfacing information UNIX/Linux needs) are contained. In additio ...
... This concept may take a little getting used to before all that is means sets in. To log into a UNIX system your terminal must be described to the system. In the directory /dev the system device files (files that contain the hardware interfacing information UNIX/Linux needs) are contained. In additio ...
UNIX Notes:
... This concept may take a little getting used to before all that is means sets in. To log into a UNIX system your terminal must be described to the system. In the directory /dev the system device files (files that contain the hardware interfacing information UNIX/Linux needs) are contained. In additio ...
... This concept may take a little getting used to before all that is means sets in. To log into a UNIX system your terminal must be described to the system. In the directory /dev the system device files (files that contain the hardware interfacing information UNIX/Linux needs) are contained. In additio ...
THE WINDOWS OPERATING SYSTEM
... The story of Windows begins with a very different operating system, developed by Microsoft for the first IBM personal computer and referred to as MS-DOS or PC-DOS. The initial version, DOS 1.0, was released in August 1981. It consisted of 4000 lines of assembly language source code and ran in 8 Kbyt ...
... The story of Windows begins with a very different operating system, developed by Microsoft for the first IBM personal computer and referred to as MS-DOS or PC-DOS. The initial version, DOS 1.0, was released in August 1981. It consisted of 4000 lines of assembly language source code and ran in 8 Kbyt ...
OPERATING SYSTEM : AN OVERVIEW – [UNIT
... not necessarily a time-sharing system. A batch or real time operating system could, and indeed usually does, have more than one active user program simultaneously in main storage. Another important, and all too similar, term is “multiprocessing”. Multiprocessing System A multiprocessing system is a ...
... not necessarily a time-sharing system. A batch or real time operating system could, and indeed usually does, have more than one active user program simultaneously in main storage. Another important, and all too similar, term is “multiprocessing”. Multiprocessing System A multiprocessing system is a ...
Chapter 4 - cse.sc.edu
... To introduce the notion of a thread—a fundamental unit of CPU utilization that forms the basis of multithreaded computer systems ...
... To introduce the notion of a thread—a fundamental unit of CPU utilization that forms the basis of multithreaded computer systems ...
VirtuOS: an operating system with kernel virtualization
... system call interface [48], which can avoid the cost of local system calls in many cases. Individual user processes may have system calls serviced by different service domains, which can provide redundancy when operating separate service domains for separate groups of user processes. Each service do ...
... system call interface [48], which can avoid the cost of local system calls in many cases. Individual user processes may have system calls serviced by different service domains, which can provide redundancy when operating separate service domains for separate groups of user processes. Each service do ...
Operating-System Debugging
... یک عدد نسبت داده می شودsystem call معموال به هر . شامل یک جدول می شود که بر اساس این عدد شاخص گذاری شده استsystem call واسط The system call interface invokes intended system call in OS kernel and returns ...
... یک عدد نسبت داده می شودsystem call معموال به هر . شامل یک جدول می شود که بر اساس این عدد شاخص گذاری شده استsystem call واسط The system call interface invokes intended system call in OS kernel and returns ...
Multiprocessing with the Exokernel Operating System - PDOS
... An exokernel gives applications direct access to hardware, rather than encapsulating them in high-level abstractions. For example, traditional operating systems represent physical memory as virtual memory. Virtual to physical address translations are managed by the operating system. An exokernel, on ...
... An exokernel gives applications direct access to hardware, rather than encapsulating them in high-level abstractions. For example, traditional operating systems represent physical memory as virtual memory. Virtual to physical address translations are managed by the operating system. An exokernel, on ...
Networks and Operating Systems (252-0062
... Linux Air Disgruntled employees of all the other OS airlines decide to start their own airline. They build the planes, ticket counters, and pave the runways themselves. They charge a small fee to cover the cost of printing the ticket, but you can also download and print the ticket yourself. When you ...
... Linux Air Disgruntled employees of all the other OS airlines decide to start their own airline. They build the planes, ticket counters, and pave the runways themselves. They charge a small fee to cover the cost of printing the ticket, but you can also download and print the ticket yourself. When you ...
计算概论 - 北京大学网络所
... the invention of the integrated circuit in 1958, the number of transistors that can be placed inexpensively on an integrated circuit has increased exponentially, doubling approximately every two years.The trend was first observed by Intel co-founder Gordon E. Moore in a 1965 paper.It has continued f ...
... the invention of the integrated circuit in 1958, the number of transistors that can be placed inexpensively on an integrated circuit has increased exponentially, doubling approximately every two years.The trend was first observed by Intel co-founder Gordon E. Moore in a 1965 paper.It has continued f ...
2_threads
... What about disabling interrupts on multicore? Never execute a blocking call while interrupts are disabled Would you implement P() by simply disable interrupts, and V() by enabling interrupts? Why or why not? – If not, how might you use interrupts to implement P and V instead? ...
... What about disabling interrupts on multicore? Never execute a blocking call while interrupts are disabled Would you implement P() by simply disable interrupts, and V() by enabling interrupts? Why or why not? – If not, how might you use interrupts to implement P and V instead? ...
Document
... Example Java: – identifiers can be declared before they are used. – thus a Java compiler need at least two passes Class Example { void inc() { n = n + 1; } int n; void use() { n = 0 ; inc(); } ...
... Example Java: – identifiers can be declared before they are used. – thus a Java compiler need at least two passes Class Example { void inc() { n = n + 1; } int n; void use() { n = 0 ; inc(); } ...
Powerpoint format
... IPC Using Named Pipes Named pipes are created as special files. They are also called FIFO (First-in First-out) Named pipes can be created from the shell with (for example)“mknod myfifo p” This command results in the creation of a named pipe called myfifo with a file type p (try it out) Operating Sy ...
... IPC Using Named Pipes Named pipes are created as special files. They are also called FIFO (First-in First-out) Named pipes can be created from the shell with (for example)“mknod myfifo p” This command results in the creation of a named pipe called myfifo with a file type p (try it out) Operating Sy ...
Library (computing)
In computer science, a library is a collection of non-volatile resources used by computer programs, often to develop software. These may include configuration data, documentation, help data, message templates, pre-written code and subroutines, classes, values or type specifications. In IBM's OS/360 and its successors they are referred to as partitioned data sets.In computer science, a library is a collection of implementations of behavior, written in terms of a language, that has a well-defined interface by which the behavior is invoked. This means that as long as a higher level program uses a library to make system calls, it does not need to be re-written to implement those system calls over and over again. In addition, the behavior is provided for reuse by multiple independent programs. A program invokes the library-provided behavior via a mechanism of the language. For example, in a simple imperative language such as C, the behavior in a library is invoked by using C's normal function-call. What distinguishes the call as being to a library, versus being to another function in the same program, is the way that the code is organized in the system. Library code is organized in such a way that it can be used by multiple programs that have no connection to each other, while code that is part of a program is organized to only be used within that one program. This distinction can gain a hierarchical notion when a program grows large, such as a multi-million-line program. In that case, there may be internal libraries that are reused by independent sub-portions of the large program. The distinguishing feature is that a library is organized for the purposes of being reused by independent programs or sub-programs, and the user only needs to know the interface, and not the internal details of the library.The value of a library is the reuse of the behavior. When a program invokes a library, it gains the behavior implemented inside that library without having to implement that behavior itself. Libraries encourage the sharing of code in a modular fashion, and ease the distribution of the code. The behavior implemented by a library can be connected to the invoking program at different program lifecycle phases. If the code of the library is accessed during the build of the invoking program, then the library is called a static library. An alternative is to build the executable of the invoking program and distribute that, independently from the library implementation. The library behavior is connected after the executable has been invoked to be executed, either as part of the process of starting the execution, or in the middle of execution. In this case the library is called a dynamic library. A dynamic library can be loaded and linked as part of preparing a program for execution, by the linker. Alternatively, in the middle of execution, an application may explicitly request that a module be loaded.Most compiled languages have a standard library although programmers can also create their own custom libraries. Most modern software systems provide libraries that implement the majority of system services. Such libraries have commoditized the services which a modern application requires. As such, most code used by modern applications is provided in these system libraries.