Cours - Systèmes d'exploitation et cloud
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Cours de systèmes d'exploitation et cloud, partagés par des étudiants et des enseignants. Thèmes couverts : Linux, Unix, Windows Server, Docker, Kubernetes, virtualisation.
This document provides a corrective guide for Evaluation 1 within the GNU/Linux course. It lists precise answers to 22 questions, covering topics related to Linux commands, system administration, and operating system knowledge. The answers are concise and identified by letters corresponding to multiple-choice options. This guide is aimed at assisting students in validating their performance and understanding key aspects of the course.
This document is a 22-question multiple-choice evaluation for the GNU/Linux course MP2L. It covers the core concepts of Linux and Unix systems such as kernel functions, historical developments, licensing, installation, commands, and user management. The exam emphasizes practical knowledge of commands like chmod, sort, and passwd, as well as the significance of configuration files like ~/.bashrc and /etc/apt/sources.list. Key topics also include file system hierarchy, graphical interfaces, and multi-boot management through GRUB.
Clustering in Linux involves distributing tasks across multiple machines to significantly reduce execution time, with distinctions between system-level and software-level clustering. It supports diverse use cases, including scientific calculations, storage, high availability, and load balancing. Tools like PVM and MPI enable cluster implementation, with PVM favoring heterogeneous networks and MPI providing advanced features for parallel processing. Various projects, such as Beowulf and distributed.net, demonstrate the application of clustering in both research and practical scenarios, highl...
This document explains the unique file handling system of GNU/Linux, distinguishing between regular files, directory files, and special device files. It elaborates on the hierarchical file organization method, the semantics of absolute and relative paths, and the inode attribute system, including user permissions. Furthermore, it discusses the utilization of mounting mechanisms for multi-disk and network file accessibility alongside file management through the Network File System (NFS) protocol.
This document provides a comprehensive guide to text editors and advanced commands under GNU/Linux. It details various text editors like 'vi', 'vim', 'emacs', and functionalities such as navigation, editing modes, and command usage. Advanced usage of 'vi' is explained with examples for editing, searching, and replacing text. It also explores system documentation access methods, including 'man', 'whatis', 'apropos', and 'info', alongside tools like 'which', 'whereis', and 'locate' for locating files and commands. The importance of reliable documentation and references to online and official...
This document provides a comprehensive introduction to the GNU/Linux operating system, emphasizing its multi-platform, multi-user, and open-source characteristics. It explores various Linux distributions, discussing their unique features and use cases, as well as the architecture common to most distributions. Additionally, the General Public License (GPL) underpinning the free software philosophy is addressed, detailing its legal provisions. Finally, the document briefly explains the Linux kernel's role as the intermediary between software and hardware during system operations.
This document introduces virtualization on GNU/Linux systems by defining virtualization as the use of hardware and software to run multiple operating systems or applications on a single machine. It discusses the benefits, including efficient resource utilization, enhanced security, and testing environments, while highlighting its economic advantages for enterprises and individuals alike. Four main virtualization techniques—virtual machines, OS-based isolation, full hypervisors, and paravirtualization—are explored with examples like Qemu, VMware, and VirtualBox for implementation. Finally, i...
This document introduces the concept of processes in GNU/Linux, detailing their life cycle, management, and types. It describes the distinctions between system and user processes, including their hierarchical parent-child relationships and resource management. Additionally, it explains process termination states like zombies and highlights the use of key commands like `ps` and `kill`, showcasing their ability to monitor, handle, and terminate processes. Finally, input-output redirection is elaborated, covering standard input, output, error handling, and redirection methods.
This document delves into virtualization under GNU/Linux by defining its concept and exploring techniques like machine virtualization, OS virtualization, and their applications. It discusses virtualization as the simultaneous functioning of multiple operating systems on a single physical machine, emphasizing resource optimization and security. It highlights use cases, from running legacy applications to server consolidation and software testing. The document further explains the architecture of virtualization solutions, including hypervisors and isolators, and evaluates their performance an...
The document is an educational guide centered on the use of text editors, specifically focusing on VI and VIM editors in GNU/Linux systems. It offers detailed instructions on text manipulation commands, modes of operation, and advanced features such as search, replace, and regular expressions. Additionally, the guide discusses Linux documentation systems like manual pages and info pages, emphasizing the importance of accurate and accessible documentation. The text incorporates usage examples, making it a practical resource for system administrators and Linux users.
This document explores the file system management within GNU/Linux, emphasizing its broader definition of 'file' as typed objects that accommodate operations. Key topics include classification into regular files, directories, special files, symbolic links, FIFOs, and sockets, with specific examples demonstrating their roles. The hierarchical tree-like structure of the GNU/Linux file system is detailed, including mounting mechanisms, paths (absolute and relative), i-nodes, and associated attributes vital for efficient file management.
This document serves as an educational glossary covering fundamental concepts and tools related to the GNU/Linux operating system. It provides detailed explanations on various aspects, including administrators' roles, usage of command-line interfaces, and the functionality of distributions, environments, and software tools like Gnome and KDE. The glossary highlights the principles of open-source computing, collaboration among users, and differences between systems like UNIX and GNU/Linux. Additionally, it explains practical tools and utility software used for system management and customiza...
This document discusses the GNU/Linux operating system, emphasizing its open-source licensing under the GPL, which permits access to and modification of its source code. It explores the system’s fundamental characteristics—such as being multi-platform, multi-user, and robust—making it suitable for both academic and industrial applications. Additionally, the document provides an overview of various distributions, their unique features, and practical guidelines for choosing the most suitable one based on user needs. Different graphical and manual interfaces, as well as essential installation...
The document explains the evolution of program creation methods, emphasizing modular programming and the efficiency of libraries. Libraries are broken down into static and shared types, detailing their structure, functionalities, and interaction during compilation or execution. The text also focuses on the Linux linker `ld` and its process in linking object modules and resolving dependencies dynamically and statically. Examples cover advantages of shared libraries for saving memory and execution resources in multitasking environments.
This document explores the Wiener Process, commonly known as Brownian Motion, its historical context, and its applications in various fields including finance and communication. It provides a detailed mathematical framework, including definitions and key properties of stochastic processes. The importance of the Wiener Process in modern financial theory is emphasized through examples and rigorous mathematical analysis.
This document discusses stochastic processes with a focus on their application in financial modeling. It covers key concepts such as Markov chains, martingales, and the Wiener process, and highlights the importance of these processes in the assessment of financial models. The document also outlines the definitions and characteristics of various types of stochastic processes.
Ce document traite de l'ordonnancement des processus dans les systèmes d'exploitation temps réel. Il couvre des sujets comme l'ordonnancement par horloge, les priorités, et la gestion des interruptions. Des exemples d'implémentation d'ordonnancement cyclique sont également fournis.
This document outlines the final exam for the course INF2610 at École Polytechnique de Montreal. The exam consists of 5 questions focusing on file system optimization, server configuration, and disk scheduling algorithms. Students are allowed to use documentation and a non-programmable calculator.
This document provides an in-depth explanation of process management in operating systems, discussing various concepts such as process structures, multiprogramming, and process genealogy. It delves into the components of process memory, state transitions, and the importance of context switching with interruptions. Emphasizing process creation and scheduling, it introduces strategies for optimal CPU usage ranging from first-come-first-serve to other scheduling algorithms. The content is further enriched with practical examples and system commands relevant to both Unix and Windows environments.