linux operating system official website

... Trang 1UNIX & LINUX Operating SystemThanh-Hai DANG Information Systems Dept -VNUH Email: haidt82@yahoo.com Trang 2“UNIX is user-friendly, ... versions – System V from AT&T ( System III from 82) – 4.2 BSD of Berkeley Uni, Base for many OS: Sun Microsystems (SunOS), Digital (Ultrix)… – XENIX of Microsoft for PC (Compatible with System ... Trang 17Live CD Linux• Distro Linux on one CD – GNU/Linux OS Plus with necessary softwares – Not affect the current status of PC, HD not required! • Some typical distro – Knoppix – DemoLinux – Mandows

Ngày tải lên: 09/05/2014, 08:45

... LESSON 9 Linux Operating System Vulnerabilities and security Objectives ♦ Describe the fundamentals of the Linux operating system ♦ Describe the vulnerabilities of the Linux operating system ... operating system ♦ Describe Linux remote attacks ♦ Explain countermeasures for protecting the Linux operating system 2 Review of Linux Security Fundamentals ♦ Linux is a version of UNIX – ... sc/etc/shadow Root:2bcadvr345:0:0:root: /root: /bin/bash - John The Ripper - Viper - Slurple 6 7 Linux File System ♦ Ls –l ♦ -r-x-r-x-wx ♦ Chmod 777 a.txt Firewall: iptables 8 9 10

Ngày tải lên: 29/07/2014, 08:20

... Trang 1Linux Operating System Trang 2Nội dung Tổng quan về hệ điều hành Linux  Hệ thống tập tin trên Linux  Bộ thông dịch lệnh  Lập trình shell script Trang 3Các thành phần của Linux OSTrang ... file-name Trang 14Tài liệu chi tiết Ngô Bá Hùng - Linux - Các lệnh cơ bản  Ngô Bá Hùng - Linux - Hệ thống tập tin  FOSS-Wire.com - Unix/Linux Command Reference [http://sites.google.com/site/nbhung/open-source] ... Nền: hỗ trợ nhiều kiến trúc máy tính: Intel, Alpha, MIPS, Motorola, 64bits system, IBM S/390, SMPs Trang 5Lý do chọn Linux OS (2) Bộ giả lập: cho phép chạy các ứng dụng của các hệ điều hành khác

Ngày tải lên: 08/05/2021, 13:20

... regarding GNU/Linux http:/ /www.linuxjournal.com – Linux Gazette GNU/Linux magazine http://www.linuxgazette.com – Linux-mag GNU/Linux magazine http://www.linux-mag.com – Official web page of the XFree86 ... GNU/Linux http://www.linuxsese-curity.com – LinuxHQ: General information on GNU/Linux distributions, security etc http://www.linuxhq.com – Linux Journal Page of news and articles regarding GNU/Linux ... http://www.fsf.org – Official web page of Debian GNU/Linux http://www.debian.org – Official web page of RedHat Linux http://www.redhat.com – Official web page of SuSE http://www.novell.com/es-es/linux/ – Official

Ngày tải lên: 08/03/2014, 23:20

... and Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 6, 2005Components of a Linux System Trang 12Components of a Linux System (Cont.)„ Like most UNIX implementations, Linux is composed ... the history of the UNIX operating system from which Linux is derived and the principles which Linux is designed upon „ To examine the Linux process model and illustrate how Linux schedules processes ... PC and PowerMac systems kernel, 64-bit memory support Trang 721.7 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 6, 2005The Linux System „ Linux uses many

Ngày tải lên: 28/06/2014, 02:20

... (2)The UNIX I/O system in BSD Trang 24An example of streams in System V Trang 25The UNIX File System (1)Some important directories found in most UNIX systems Trang 26The UNIX File System (2)• Before ... 35UNIX File System (4)• A BSD directory with three files • The same directory after the file voluminous has been removed Trang 36The Linux File SystemLayout of the Linux Ex2 file system Trang ... directory entry Trang 32UNIX File System (1)Disk layout in classical UNIX systems Trang 33UNIX File System (2)Directory entry fields Structure of the i-node Trang 34UNIX File System (3) The relation between

Ngày tải lên: 18/10/2014, 15:30

...    The relation between the file descriptor table, the open file description Trang 36The Linux File System Layout of the Linux Ex2 file system Trang 37Network File System (1) • Examples of remote mounted file systems • Directories are shown as squares, files as circles ... Fields returned by the lstat system call Trang 32UNIX File System (1) Disk layout in classical UNIX systems Trang 33UNIX File System (2) Directory entry fields Structure of the i­node Trang 34UNIX File System (3) ... The UNIX I/O system in BSD Trang 24Streams An example of streams in System V Trang 25The UNIX File System (1) Some important directories found in most UNIX systems Trang 30The  lstat  System Call

Ngày tải lên: 30/01/2020, 04:43

... (File System) 4 Quản lý nhập xuất (I/O) 5 Quản lý thiết bị lưu trữ (Secondary-storage) 6 Quản lý mạng (Networking) 7 Hệ thống bảo vệ (Protection System) 8 Hệ thông dịch lệnh (Commander-Intpreter System) ... Trang 1PHẦN 2: HỆ ĐIỀU HÀNH (OPERATING SYSTEM) Chương 1: Tổng quan Hệ điều hành Đáp án 1 Tổ chức, quản lý và phân phối tài nguyên ... (Program execution) 3 Tổ chức và quản lý xuất nhập (I/O operations) 4 Quản lý hệ thống File (File-system manipulation) 5 Truyền tin (Communications) 6 Xác định và xử lý lỗi (Error detection) 7 Các

Ngày tải lên: 19/10/2013, 18:15

... Trang 1THE OPERATING SYSTEM MACHINE LEVEL 1 Trang 2Microprogram or hardwareFigure 6-1 Positioning of the operating system machine level. Trang 3Address space Address ... Trang 19Virtual page tagFlags (b) (c) Format is entirely defined by the operating system Translation table (Operating system) TSB (MMU + sofware) Context Figure 6-18 Data structures used in translating ... programSystem call interface File system Process management Block cache IPC Scheduling Hardware Device drivers User mode Kernel mode Memory mgmt. Signals Figure 6-30 The structure of a typical UNIXsystem.

Ngày tải lên: 12/12/2013, 09:15

... multithreaded operating system—and a very efficient one Whileprogrammers can explicitly create threads, much of the work of handling threads is taken care of behind the scenes by the operating system ... with thesystem’s ability to assign threads to processors based on the current load on eachprocessor, makes for a system with very high performance Preemptive Multitasking An operating system that ... method of implementing multitasking is for an operating system to employ preemptive multitasking In a preemptive multitasking environ-ment the operating system can, and does, preempt currently running

Ngày tải lên: 26/01/2014, 07:20

... Be kits hold the software that make up much of the BeOS, sothis library is a part of the Be operating system rather than a file included with theBeIDE environment Library filenames will be prefaced ... thought of as one part, or entity, of a program’s graphical user interface For instance, some operating systems make it easy to represent a window or menu as a resource But a resource doesn’t have ... graphical For instance, an application’s signature—a short, Trang 13unique string that helps the operating system differentiate the application from allother applications—is anything but graphical Yet

Ngày tải lên: 26/01/2014, 07:20

... Messages) include BCheckBox, BRadioButton, and BPictureButton Trang 4Storage KitAll operating systems provide file system capabilities—without them, data couldn’t be saved to disk The Storage Kit ... Byimplementing a hook function, your application in essence extends the functional-ity of the Be operating system The system is responsible for calling a hook func-tion, while your application is responsible ... that the system is aware of.You saw an example of a hook function in the SimpleApp example back inChapter 1—the QuitRequested() function When a window’s close button isclicked on, the Be system

Ngày tải lên: 26/01/2014, 07:20

... Kit chapter of the Be Book. Accessing Windows Fortunately for you, the programmer, the Be operating system takes care of much of the work in keeping track of your application’s windows and the ... by 201 pixels high (The “extra” pixel in each direction is the result of zero-based coordinate systems.)The frame coordinates specify the content area of a window—the window’s titletab is not ... message sent from the Application Server to a BWindow object and then on to the view This messaging system is the principle on which controls such as buttons work The details of working with controls

Ngày tải lên: 26/01/2014, 07:20

... threecolor components), and because it is a color system with which many program-mers and end users are familiar with (it’s common to several operating systems).The BeOS defines rgb_color as a struct ... of 256 colors A pixel value in the range of 0 to 255 is used as an index into a color map This system color map isidentical for all applications That means that when two programs use thesame ... defining analpha byte, which is used to specify a transparency level for a color Trang 3RGB Color SystemAs listed above, the BeOS supports a number of color spaces The RGB colorspace is popular

Ngày tải lên: 26/01/2014, 07:20

... messages and handle them.For the most part, system messages are handled automatically; for instance, when a B_ZOOM message is received, the operating system zooms the window But youcannot completely ... Application Server delivers a system message to an applicationwindow, that message arrives in the form of a BMessage object Your code deter-mines how to handle a system message simply by overriding ... 10When the program refers to a system message by its Be-defined constant, such asB_QUIT_REQUESTED or B_KEY_DOWN, what’s really of interest is the what datamember of the system message The value of

Ngày tải lên: 26/01/2014, 07:20

... a menu with a single menu item in it Choosing the Beep Once item from the Audio menu sounds the system beep Figure 7-2 The SimpleMenuBar program’s window Trang 7Preparing the window class for ... menubar, menu, and menu item By default, the height of a menubar will be 18 pixels (though the system will matically alter the menubar height to accommodate a large font that’s used to dis-play

Ngày tải lên: 26/01/2014, 07:20

... You’re most familiar with the system message: a message that has a corresponding hook function to which the system passes the message A different type of sage the system recognizes and reacts ... includes a line oftext written in each of the three system fonts.Contradictory as it sounds, the user can change the font that’s used for any of theglobal system fonts Figure 8-2 shows that the FontPanel ... shouldn’t force the user to have a particular non-system font on his or her machine, but it can give the user the option of displaying text in a non-system font Consider a word pro-cessor you’re

Ngày tải lên: 26/01/2014, 07:20

... or make choices The User Interface - Dialog Boxes Trang 19• Some older operating systems, such as DOS (Disk Operating System) and UNIX, use command-line interfaces.• In a command-line interface, ... Information • Multitasking Running Programs Trang 22• The operating system manages all the other programs that run on the PC. • The operating system provides services to programs and the user, including ... a program that performs a task that is not typically handled by the operating system.Some utilities enhance the operating system's Trang 32• Explain how the OS enables users to manage files.•

Ngày tải lên: 16/02/2014, 13:20

... Internetwork Operating System l Router Bootup Process l Router Ports and Interfaces l Routers and the Network Layer Trang 4Routers are Computers l A router is a computer: Ÿ CPU, RAM, ROM, Operating System ... program Ÿ Scaled down version of operating system IOS Ÿ Stores startup configuration (including IP addresses, Routing protocol) l Flash memory - Contains the operating system (Cisco IOS) l Interfaces ... boot system commands in startup-config file (NVRAM) If boot system commands in startup-config a Run boot system commands in order they appear in startup-config to locate the IOS b If boot system

Ngày tải lên: 09/03/2014, 13:20

... implement these programs, you should firstunderstand how to harden a system manually Updating the Operating System An operating system may contain many security vulnerabilities and software bugs ... hardening a Linux server is to apply the most current errata and UpdateService Package to the operating system.The Update Service Package provides the latestfixes and additions to the operating system ... operating system allows the server to operate efficiently and securely This chapter includes the essential steps an administrator must follow to harden a Unixsystem; specifically, a Red Hat Linux

Ngày tải lên: 19/03/2014, 13:35