Linux Systems Programming I
... Introduction to the Linux operating system and its resources. Concepts of multi-tasking operating systems, system calls, process control. Basic Linux shells, file handling, inter-process communication, and resource sharing. Prerequisite: Computer Science 15 or Computer Science 18A and Computer Scien ...
... Introduction to the Linux operating system and its resources. Concepts of multi-tasking operating systems, system calls, process control. Basic Linux shells, file handling, inter-process communication, and resource sharing. Prerequisite: Computer Science 15 or Computer Science 18A and Computer Scien ...
Chapter 2: Operating-System Structures
... Often, more information is required than the identity of the desired system call – Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS – 1) Simplest: pass the parameters in registers • In some cases, may be more parameters than r ...
... Often, more information is required than the identity of the desired system call – Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS – 1) Simplest: pass the parameters in registers • In some cases, may be more parameters than r ...
Slides
... Often, more information is required than the identity of the desired system call – Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS – 1) Simplest: pass the parameters in registers • In some cases, may be more parameters than r ...
... Often, more information is required than the identity of the desired system call – Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS – 1) Simplest: pass the parameters in registers • In some cases, may be more parameters than r ...
History of OS - EECG Toronto
... • Designed to support hundreds of users on a machine far less powerful than iPhone 5 • People knew how to write small, efficient programs in those days ...
... • Designed to support hundreds of users on a machine far less powerful than iPhone 5 • People knew how to write small, efficient programs in those days ...
Components of a Linux System
... three main bodies of code: kernel, system libraries, and system utilities; the most important distinction between the kernel and all other components The kernel is responsible for maintaining the important ...
... three main bodies of code: kernel, system libraries, and system utilities; the most important distinction between the kernel and all other components The kernel is responsible for maintaining the important ...
operating systems
... the same time, a task being a program. The terms multitasking and multiprocessing are often used interchangeably, although multiprocessing sometimes implies that more than one CPU is involved. In multitasking, only one CPU is involved, but it switches from one program to another so quickly that it g ...
... the same time, a task being a program. The terms multitasking and multiprocessing are often used interchangeably, although multiprocessing sometimes implies that more than one CPU is involved. In multitasking, only one CPU is involved, but it switches from one program to another so quickly that it g ...
Answers to Even-numbered Exercises
... 6. What is a utility program? A utility (program), sometimes referred to as a command, performs a task that is frequently related to the operating system. A utility is simpler than an application program, although no clear line separates the two. Linux distributions, such as Ubuntu Linux, include ma ...
... 6. What is a utility program? A utility (program), sometimes referred to as a command, performs a task that is frequently related to the operating system. A utility is simpler than an application program, although no clear line separates the two. Linux distributions, such as Ubuntu Linux, include ma ...
Chapter 21: The Linux System Objectives 21.1 History (不考) Linux 2.0
... First developed as a small but self-contained kernel in 1991 by Linus Torvalds, with the major design goal of UNIX compatibility ...
... First developed as a small but self-contained kernel in 1991 by Linus Torvalds, with the major design goal of UNIX compatibility ...
Processes in Unix, Linux, and Windows
... – Not a parent child relationship – Note – privileges required to create a new process ...
... – Not a parent child relationship – Note – privileges required to create a new process ...
Answers to Even-Numbered Exercises
... under DOS. A shell script is one or more command lines contained in a file. Make the file executable and give the name of the file as a command. The shell then executes the commands in the file as though you had typed each command individually. (You may need to give the command as ./command.) 10. Wh ...
... under DOS. A shell script is one or more command lines contained in a file. Make the file executable and give the name of the file as a command. The shell then executes the commands in the file as though you had typed each command individually. (You may need to give the command as ./command.) 10. Wh ...
Unix Commands
... the permissions for a triplet. • We can do this by determining whether or not a permission is turned on or off. • If turned on, a permission gets a value of 1; if turned off, it gets a value of 0. ...
... the permissions for a triplet. • We can do this by determining whether or not a permission is turned on or off. • If turned on, a permission gets a value of 1; if turned off, it gets a value of 0. ...
Unix File System
... 1. If the effective user ID of the calling process is the superuser (root), the kernel sets as real and effective user ID the input parameter uid. 2. If the effective user ID of the calling process is not the superuser: 2.1 If uid = real user ID, the effective user ID is set to uid (success). 2.2 El ...
... 1. If the effective user ID of the calling process is the superuser (root), the kernel sets as real and effective user ID the input parameter uid. 2. If the effective user ID of the calling process is not the superuser: 2.1 If uid = real user ID, the effective user ID is set to uid (success). 2.2 El ...
Chapter 2 Operating System Overview Operating System Overview
... Multitasking • From Windows 2000 on Windows development developed to exploit modern 32-bit and 64-bit microprocessors • Designed for single users who run multiple programs • Main drivers are: – Increased memory and speed of microprocessors – Support for virtual memory ...
... Multitasking • From Windows 2000 on Windows development developed to exploit modern 32-bit and 64-bit microprocessors • Designed for single users who run multiple programs • Main drivers are: – Increased memory and speed of microprocessors – Support for virtual memory ...
Operating System Overview
... Multitasking • From Windows 2000 on Windows development developed to exploit modern 32-bit and 64-bit microprocessors • Designed for single users who run multiple programs • Main drivers are: – Increased memory and speed of microprocessors – Support for virtual memory ...
... Multitasking • From Windows 2000 on Windows development developed to exploit modern 32-bit and 64-bit microprocessors • Designed for single users who run multiple programs • Main drivers are: – Increased memory and speed of microprocessors – Support for virtual memory ...
Chapter 2Operating System Overview
... Multitasking • From Windows 2000 on Windows development developed to exploit modern 32-bit and 64-bit microprocessors • Designed for single users who run multiple programs • Main drivers are: – Increased memory and speed of microprocessors – Support for virtual memory ...
... Multitasking • From Windows 2000 on Windows development developed to exploit modern 32-bit and 64-bit microprocessors • Designed for single users who run multiple programs • Main drivers are: – Increased memory and speed of microprocessors – Support for virtual memory ...
accounting for managers - Pailan College of Management and
... Operating system is one of the most important things in computer science. Starting from desktop to hand held cellular phone, without operating system everything is useless. It not only helps us to use the computers or laptops etc. properly, but it acts as a good resource manager also. In this subjec ...
... Operating system is one of the most important things in computer science. Starting from desktop to hand held cellular phone, without operating system everything is useless. It not only helps us to use the computers or laptops etc. properly, but it acts as a good resource manager also. In this subjec ...
lec01
... Jointly developed by MIT, Bell Labs and GE Envisioned one main computer to support everyone ...
... Jointly developed by MIT, Bell Labs and GE Envisioned one main computer to support everyone ...
Introduction
... • Real-time operating systems – Special O/S’s that operate in real time – Response of hardware must meet strict time requirements – VxWorks and QNX are two “well known” O/S in this group • Embedded operating systems – O/S for small devices (PDA’s cell phones) – PALMOS, Windows CE • Smart card operat ...
... • Real-time operating systems – Special O/S’s that operate in real time – Response of hardware must meet strict time requirements – VxWorks and QNX are two “well known” O/S in this group • Embedded operating systems – O/S for small devices (PDA’s cell phones) – PALMOS, Windows CE • Smart card operat ...
Operating Systems
... Professor Andy Tannenbaum) Linus set out to write his own 'kernel' — the core of an operating system that handles memory allocation, talks to hardware devices, and makes sure everything keeps running. He used the GNU programming tools developed by Richard Stallman's Free Software Foundation, an orga ...
... Professor Andy Tannenbaum) Linus set out to write his own 'kernel' — the core of an operating system that handles memory allocation, talks to hardware devices, and makes sure everything keeps running. He used the GNU programming tools developed by Richard Stallman's Free Software Foundation, an orga ...
CUSTOMER_CODE SMUDE DIVISION_CODE SMUDE
... i.Devices: To provide applications with easy access to hardware devices. UNIX allows them to be used in much the same way as ordinary files. There are two types of devices in UNIX- block-oriented devices which transfer data in blocks and character – oriented devices that transfer data on a byte-by – ...
... i.Devices: To provide applications with easy access to hardware devices. UNIX allows them to be used in much the same way as ordinary files. There are two types of devices in UNIX- block-oriented devices which transfer data in blocks and character – oriented devices that transfer data on a byte-by – ...
Operating Systems
... Multitasking • From Windows 2000 on Windows development developed to exploit modern 32-bit and 64-bit microprocessors • Designed for single users who run multiple programs • Main drivers are: – Increased memory and speed of microprocessors – Support for virtual memory ...
... Multitasking • From Windows 2000 on Windows development developed to exploit modern 32-bit and 64-bit microprocessors • Designed for single users who run multiple programs • Main drivers are: – Increased memory and speed of microprocessors – Support for virtual memory ...
Chapter 7A Functions of Operating Systems Types of Operating
... • Command line interfaces – Older interface • DOS, Linux, UNIX ...
... • Command line interfaces – Older interface • DOS, Linux, UNIX ...
1. design principle
... earliest Simple batch systems to monolithic design to Layered approach and now finally an Client server or Micro kernel approach. The monolithic operating systems are organized more haphazardly and don’t enforce any data hiding in the operating system. It delivers a better application performance bu ...
... earliest Simple batch systems to monolithic design to Layered approach and now finally an Client server or Micro kernel approach. The monolithic operating systems are organized more haphazardly and don’t enforce any data hiding in the operating system. It delivers a better application performance bu ...
Unix
Unix (all-caps UNIX for the trademark) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, developed in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.Initially intended for use inside the Bell System, AT&T licensed Unix to outside parties from the late 1970s, leading to a variety of both academic and commercial variants of Unix from vendors such as the University of California, Berkeley (BSD), Microsoft (Xenix), IBM (AIX) and Sun Microsystems (Solaris). AT&T finally sold its rights in Unix to Novell in the early 1990s, which then sold its Unix business to the Santa Cruz Operation (SCO) in 1995, but the UNIX trademark passed to the industry standards consortium The Open Group, which allows the use of the mark for certified operating systems compliant with the Single UNIX Specification (SUS). Among these is Apple's OS X, which is the Unix version with the largest installed base as of 2014.From the power user's or programmer's perspective, Unix systems are characterized by a modular design that is sometimes called the ""Unix philosophy"", meaning that the operating system provides a set of simple tools that each perform a limited, well-defined function, with a unified filesystem as the main means of communication and a shell scripting and command language to combine the tools to perform complex workflows. Aside from the modular design, Unix also distinguishes itself from its predecessors as the first portable operating system: almost the entire operating system is written in the C programming language that allowed Unix to reach numerous platforms.Many clones of Unix have arisen over the years, of which Linux is the most popular, having overtaken the popularity of SUS-certified Unices on server platforms since its inception in the early 1990s.