unix linux operating system ppt

... on Unix/ Linux ã Some facilities Distributions Linux ã Distribution = A collection of all or some programs altogether around a Linux kernel which allows to install a collaborative system, operating ... initdefault: – Use command $startx Unix kernel architect Content ã Unix/ Linux Chronology. ã File System ã Process Management ã User Management ã Networking with Unix ã Programable Filters ã Programming ... –a  Linux linuxsrv.linuxvn.net 2.2.14-5.0#1 Tue Mar 7 21:07:39 EST 2000 i386 unknown Free Software, Linux & Open Source ã 1984 : Richard Stallman, The Father of GNU (Gnu is Not Unix) ...

Ngày tải lên: 09/05/2014, 08:45

... file system hierarchy Any operating system needs to save numerous files: from system configuration files, to log files or user files etc. In general, each operating system uses its own file system ... add a group to the system. Dates on UNIX systems On UNIX systems, dates are normally shown according to the number of seconds elapsed since 1st January 1970. Disk quota For systems with hundreds ... use. On GNU/ Linux systems, this system is called a quota. GNUFDLã PID_00148393 19 Basic GNU /Linux servers, groups etc. This account should not be used for working normally on the system. We should...

Ngày tải lên: 08/03/2014, 23:20

... documentation on UNIX : 7.1. Standard UNIX Documentation DOS, accessing with UNIX : 4.4.6. Files on Other Operating Systems MTOOLS utilities for : 4.4.6. Files on Other Operating Systems dot ... prompt; you can enter UNIX commands again. Previous: 1.2 Syntax of UNIX Command Lines Learning the Unix Operating System Next: 1.4 The Unresponsive Terminal 1.2 Syntax of UNIX Command Lines Book ... enough, ask another UNIX user or your system administrator.) 1.1.1.1 Connecting from another operating system If you're using a personal computer to connect to the UNIX system, you'll...

Ngày tải lên: 18/03/2014, 00:20

Ngày tải lên: 29/07/2014, 08:20

Ngày tải lên: 12/08/2014, 06:22

Ngày tải lên: 18/10/2014, 15:30

Ngày tải lên: 25/11/2013, 11:07

... network operating system. Just as a computer cannot operate without an operating system, a network of computers cannot operate without a network operating system. Every network operating system ... network operating system s manufacturer, a desktop computer’s networking software can be added either to the computer’s own operating system or be integrated with it. Network operating system ... mathematical calculation. A network operating system must also support multiple processors, clusters of disk drives, and data security features. Finally, a network operating system must be reliable and...

Ngày tải lên: 09/12/2013, 17:15

... completion; the set-user-ID and set-group-ID bits of other file types may be cleared. The operating system has a configuration option {_POSIX_CHOWN_RESTRICTED}, to restrict ownership changes. When ... configuration option, include the following line in /etc /system: set rstchown = 1 To disable this option, include the following line in /etc /system: set rstchown = 0 {_POSIX_CHOWN_RESTRICTED} is ... execut- able). chmod does not check the file type to see if manda- tory locking is meaningful. If the filesystem is mounted with the nosuid option, setuid execution is not allowed. - 36 - csh csh -...

Ngày tải lên: 10/12/2013, 14:16

... ra (I/O subsystem) Chương VI. Đa xử lí (Multiprocessor Systems) Chương VII Các hệ Unix phân tán (Distributed Unix Systems) Phần 2: Lập trình trong Unix Phần 3: Lập trình mạng trong Unix Đại học ... nội Phần 1: Lí thuyết HĐH Unix/ Linux Mục lục A. Tổng quan: Vài nét về Hệ Điều hành B. Unix/ Linux Chương I. Tổng quan hệ thống Unix Chương II. Hệ thống tệp (file subsystem) 1. Tổng quan về Hệ ... do vậy việc nghiên cứu Unix trong sách này sẽ giản lược để nghiên cứu chi tiết các system calls cũng như sự tương tác giữa chúng. Và khái niệm Unix system , hay “kernel” hay system trong sách...

Ngày tải lên: 25/12/2013, 13:15

... Accept upgrade transfer from other hosts Enabled Actions [U] System XMODEM upgrade [D] Download test subsystem (XMODEM) [T] System TFTP upgrade [X] Exit to Main Menu Enter Selection: ... and Intermediate Routing v 3.0 - Lab 6.2.7a Copyright  2003, Cisco Systems, Inc. Lab 6.2.7a Managing Switch Operating System Files Objective ã Create and verify a basic switch configuration. ... An example of the Firmware Configuration Menu is: Catalyst 1900 - Firmware Configuration System Information FLASH: 1024K bytes V8.01.00 : Enterprise Edition Upgrade status: No upgrade...

Ngày tải lên: 24/01/2014, 19:20

... multithreaded operating system and a very efficient one. While programmers can explicitly create threads, much of the work of handling threads is taken care of behind the scenes by the operating system ... upgrade its operating system, it must take into account the millions of users that have a large invest- ment in software designed to run on the existing version of its operating system. So no ... with the system s ability to assign threads to processors based on the current load on each processor, makes for a system with very high performance. Preemptive Multitasking An operating system...

Ngày tải lên: 26/01/2014, 07:20

... three color 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 ... StrokeRect(rect8); SetPenSize(12.0); StrokeRect(rect12); Shapes Be claims that the BeOS is an operating system for the graphics community. So it’s hoped that the BeOS makes it easy for programmers ... user clicks the mouse in the MyDrawView view, MouseDown() makes the system aware of the fact that the view needs updating, and the system invokes Draw(): void MyDrawView::MouseDown(BPoint point) { ...

Ngày tải lên: 26/01/2014, 07:20

... the affected view invoking the BView hook function MouseDown(). Besides being the recipient of system messages, a window is also capable of receiving application-defined messages. This lets you ... window. When the user operates the control (typically by clicking on it, as for a button), the system passes the applica- tion-defined message to the window. How the window handles the message ... BWindow::MessageReceived(BMessage* message) { switch(message->what) { // handle B_KEY_DOWN and scripting-related system messages Figure 6-3. Message passed to parent class’s version of MessageReceived() message Application server MessageReceived() BWindow-derived version MessageReceived() BWindow version MessageReceived() BHandler version message message ...

Ngày tải lên: 26/01/2014, 07:20

... may not always fit within the confines of a view. Enter the scrollbar. The APIs for other operating systems that employ a graphical user interface include routines to work with scrollbars, but ... setting a view’s font to one of the global system fonts, but you can use SetFont() with any BFont object. Here, one view is having its font set to the global system font be_ plain_font, while another ... machine may have more than the three system fonts installed, your application shouldn’t make any font-related assumptions. You can’t be sure every user has a non -system font your application uses;...

Ngày tải lên: 26/01/2014, 07:20

... interface standards are EIDE (Enhanced Integrated Drive Electronics) and SCSI (Small Computer System Interface). ã EIDE has evolved over the years and has several variants, all of which have...

Ngày tải lên: 16/02/2014, 08:20

... dụng nhận được chúng. Hệ thống của bạn có thể sử dụng Unix/ Linux, nhưng đâu phải tất cả các User trong hệ thống của bạn đều sử dụng Unix/ Linux ? Nếu như không muốn nói rằng 90 % họ sử dụng Windows. ... có thể phá vỡ hoàn toàn khái niệm phân quyền, cấp vốn được coi là yếu tố tạo lên sức mạnh của Unix/ Linux Đừng quên chọn cho mình một Antivirus thích hợp. Nó có nhiệm vụ quét, cảnh báo, ngăn ... tường lửa (Firewall) và hệ thống dò xâm nhập (Network Instrution Detection). Trên môi trường Unix/ Linux có rất nhiều Soft loại này. Nhưng có lẽ có 2 ông kẹ được sử dụng khá rộng rãi vì tính an...

Ngày tải lên: 18/06/2014, 10:05

... 3.4 Silberschatz, Galvin and Gagne â2005 Operating System Concepts - 7 th Edition, Feb 7, 2006 Process in Memory Process in Memory 3.39 Silberschatz, Galvin and Gagne â2005 Operating System Concepts - 7 th Edition, ... Galvin and Gagne â2005 Operating System Concepts - 7 th Edition, Feb 7, 2006 Process Termination Process Termination  Process executes last statement and asks the operating system to delete it ... exiting  Some operating system do not allow child to continue if its parent terminates – All children terminated - cascading termination 3.3 Silberschatz, Galvin and Gagne â2005 Operating System Concepts...

Ngày tải lên: 28/06/2014, 02:20

... Chapter 13: I/O Systems Chapter 13: I/O Systems 13.21 Silberschatz, Galvin and Gagne â2005 Operating System Concepts 7 th Edition, Jan 2, 2005 Kernel I/O Subsystem Kernel I/O Subsystem  Scheduling z ... Galvin and Gagne â2005 Operating System Concepts 7 th Edition, Jan 2, 2005 The STREAMS Structure The STREAMS Structure 13.31 Silberschatz, Galvin and Gagne â2005 Operating System Concepts 7 th Edition, ... and Gagne â2005 Operating System Concepts 7 th Edition, Jan 2, 2005 Two I/O Methods Two I/O Methods Synchronous Asynchronous 13.6 Silberschatz, Galvin and Gagne â2005 Operating System Concepts...

Ngày tải lên: 28/06/2014, 02:20

Ngày tải lên: 28/06/2014, 02:20