the linux tips linux operating system

... code of Linux 0.02 on the Internet • Follows GPL • Included many GNU softwares (GNU /Linux) Free Software, …(Cont.) • 1993 : Rémy Card invented ext2 file system for Linux • 1994 : Linux ... (Cont.) • At the end of 80’s, 2 organizations said hello – UNIX International (UI) • The agreement between AT&T and Sun : SVR4 (System V Release 4), The converged Edition of System V and ... Live 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

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 – ... /etc/passwd ♦ 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

... Linux Operating System Trình bày: Bùi Minh Quân Email: bmquan@cit.ctu.edu.vn Nội dung  Tổng quan hệ điều hành Linux  Hệ thống tập tin Linux  Bộ thơng dịch lệnh  ... Linux  Bộ thơng dịch lệnh  Lập trình shell script Các thành phần Linux OS Lý chọn Linux OS (1)  Ứng dụng: nhiều ứng dụng sẵn dùng Linux (miễn phí lẫn thương mại): văn bản, đồ họa, đa phương tiện, ... Lý chọn Linux OS (3)  Tương thích: Hơn 95% mã nguồn viết C, độc lập thiết bị, nên dịch để dùng cho nhiều loại máy khác nhau: Máy chủ, máy để bàn, di dộng,  POSIX (Portable Operating System Interface

Ngày tải lên: 08/05/2021, 13:20

... Linux Operating System Trình bày: Bùi Minh Quân Email: bmquan@cit.ctu.edu.vn Nội dung  Tổng quan hệ điều hành Linux  Hệ thống tập tin Linux  Bộ thơng dịch lệnh  ... echo "2 Linux (Ubuntu)"; echo -n "Select your os choice [1 or 2]? "; read osch; if [ $osch -eq ] ; then echo "You Pick up Unix (Sun Os)" else if [ $osch -eq ] ; then echo "You Pick up Linux (Ubuntu)" ... else echo "What you don't like Unix /Linux OS." fi fi 33 Cấu trúc if-then-else đa cấp if condition then – execute all commands up to elif statement elif condition1 then – execute all commands up to

Ngày tải lên: 08/05/2021, 13:21

... the Linux file system - The Role of the Linux File System - The Hierarchical Structure of the Linux File System - Types of Files Used by Linux • The Role of the Linux File System - The data is organized ... Managing the Linux file system Managing the Linux file system Describe the Linux file system Complete common file system tasks Manage disk partitions Use removable media Back up data Describe the Linux ... The Hierarchical Structure of the Linux File System Notice that the topmost directory in the structure is the / directory, also called the root directory  Beneath the root directory are a series

Ngày tải lên: 22/02/2023, 20:22

... open the portal. If the name server approves the access, the portal manger generates the code for the por- tal, and installs the portal in the client’s portal table. The portal number of the newly ... traps to the nucleus. The trap handler uses the portal number as an index into the portal table and jumps to the code associ- ated with the portal. The portal code transfers the thread from the invoking ... by layering: the binary interface of one operating system can be emulated on another operating system by inter- cepting system calls made by an application written for the emulated system and implementing

Ngày tải lên: 01/07/2014, 18:02

... 21: The Linux System Chapter 21: The Linux System 21.2 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 6, 2005 Chapter 21: The Linux System Chapter 21: The Linux ... ©2005 Operating System Concepts – 7 th Edition, Feb 6, 2005 The Linux System The Linux System  Linux uses many tools developed as part of Berkeley’s BSD operating system, MIT’s X Window System, ... ©2005 Operating System Concepts – 7 th Edition, Feb 6, 2005 Objectives Objectives  To explore the history of the UNIX operating system from which Linux is derived and the principles which Linux

Ngày tải lên: 28/06/2014, 02:20

... Background, The root filesystem /lib, The filesystem layout, The root filesystem /lib/modules, The root filesystem /mnt, The root filesystem /proc, The root filesystem, The /proc filesystem, Filesystems ... /proc/uptime, The /proc filesystem /proc/version, The /proc filesystem /root, The root filesystem /sbin, The root filesystem /tmp, The root filesystem, The /var filesystem /usr, The filesystem layout, ... / (root), Background, The root filesystem /bin, The filesystem layout, The root filesystem /boot, The root filesystem /dev, The filesystem layout, The root filesystem, The /dev directory, Two

Ngày tải lên: 25/11/2013, 11:07

... Filesystem The file system is the program (or modules of the operating system s kernel)... booting the system • /dev/: system devices • /etc/: system configuration files and the applications ... The first thing we need to understand clearly is that any file system starts from the. .. the origin of the entire file system and there is only one To correctly organise the files, the system ... design operating systems His idea... exists in WindowsTM type operating systems ext2 filesystem The ext2 file system has been designed to handle small files, which is what an operating system

Ngày tải lên: 08/03/2014, 23:20

... Gagne ©2005 The Linux System Linux uses many tools developed as part of Berkeley’s BSD operating system, MIT’s X Window System, and the Free Software Foundation's GNU project The system libraries ... Operating System Concepts – 7th Edition, Feb 6, 2005 21.2 Silberschatz, Galvin and Gagne ©2005 Objectives To explore the history of the UNIX operating system from which Linux is derived and the ... Chapter 21: The Linux System Chapter 21: The Linux System Linux History Design Principles Kernel Modules Process Management Scheduling Memory Management File Systems Input and Output

Ngày tải lên: 13/05/2014, 00:36

... Sparc systems, and for PC and PowerMac systems. Silberschatz, Galvin and Gagne ©2002 20.5 Operating System Concepts The Linux System  Linux uses many tools developed as part of Berkeley’s BSD operating ... ©2002 20.43 Operating System Concepts Ext2fs Block-Allocation Policies Silberschatz, Galvin and Gagne ©2002 20.44 Operating System Concepts The Linux Proc File System  The proc file system does ... respectively.  The RPM Package file format permits compatibility among the various Linux distributions. 2 Silberschatz, Galvin and Gagne ©2002 20.7 Operating System Concepts Linux Licensing  The Linux

Ngày tải lên: 02/07/2014, 14:20

... I/O (2) The UNIX I/O system in BSD Streams An example of streams in System V The UNIX File System (1) Some important directories found in most UNIX systems The UNIX File System ... File System (1) Disk layout in classical UNIX systems UNIX File System (2) Directory... UNIX File System (2) Directory entry fields Structure of the i-node UNIX File System (3) The ... between the file descriptor table, the open file description UNIX File System (4) • A BSD directory with three files • The same directory after the file voluminous has been removed The Linux

Ngày tải lên: 18/10/2014, 15:30

... UNIX File? ?System? ?(4) • A BSD directory with three files • The? ?same directory after? ?the? ?file voluminous  has been removed The? ?Linux? ?File? ?System Layout of? ?the? ?Linux? ?Ex2 file? ?system Network File? ?System? ?(1) ... UNIX File? ?System? ?(1) Disk layout in classical UNIX systems UNIX File? ?System? ?(2) Directory entry fields Structure of? ?the? ?i­node UNIX File? ?System? ?(3)   ? ?The? ?relation between? ?the? ?file descriptor table,? ?the? ? ... A highly simplified shell Threads in POSIX The? ?principal POSIX thread calls The? ?ls Command Steps in executing? ?the? ?command ls type to? ?the? ?shell The? ?UNIX File? ?System? ?(2) • Before linking • After linking

Ngày tải lên: 30/01/2020, 04:43

... To explore? ?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 and provides  ... Silberschatz, Galvin and Gagne ©2009 The Linux System  Linux? ?uses many tools developed as part of Berkeley’s BSD? ?operating? ?system,  MIT’s X  Window  System,  and? ?the? ?Free Software Foundation's GNU project  The? ?min? ?system? ?libraries were started by? ?the? ?GNU project, with improvements provided by? ?the? ?Linux? ? ... Chapter 21: The Linux System Operating? ?System? ?Concepts – 8th Edition Silberschatz, Galvin and Gagne ©2009 Chapter 21: The Linux System  Linux? ?History   Design Principles

Ngày tải lên: 08/05/2021, 12:50

... The Saigon CTT The Linux Shell and BASH Scripting The Saigon CTT  Objectives Objectives  Identify differrent Linux shell environments  Understand the redirection of input ... arithmetic and arrays The Saigon CTT  Example of Script Example of Script $ more example_script #!/bin/bash /usr/bin/nmbd -D /usr/bin/smbd -D The Saigon CTT  The Linux Shell The Linux Shell  Shells ... contains the return code of the previous executed command or application 0 Success ≠0 Failure  The exit n command will cause the script to quit and assign the value of n to the variable

Ngày tải lên: 24/06/2013, 01:25

... architectures. Today, the concept of an extensible operating system is once again gaining acceptance this time as the solution to the unconstrained growth of UNIX. During the last 20 years operating systems and their ... tasks. Many other operating systems have met with this problem. Often these systems solve the problem by using inside knowledge of the algorithms used to manage secondary storage. Unfortunately, the Mach ... of the 8th Symposium on Operating System Principles, pages 64-75. December, 1981. [16] Rashid, R.F. From RIG to Accent to Mach: The Evolution of a Network Operating System. In Proceedings of the...

Ngày tải lên: 12/09/2012, 15:05

... with system messages—messages generated and dispatched by the system. The Message Protocols appendix of the Be Book defines all the system messages. In short, system messages fall into the following categories: Application ... posted message becomes the next in the queue, the looper invokes DispatchMessage() to pass the message to the target handler. The effect is for the posted message to reach the target handler’s ... sev- eral examples of the creating of messages and the dispatching of these messages both by the object that created them and by other objects. Figure 9-1. The inheritance hierarchy for the Application...

Ngày tải lên: 17/10/2013, 19:15

... For the Save file panel, the display of the panel comes when the user chooses the Save As item from the File menu. In response to the message issued by the system to the appropriate MessageReceived() ... control is in the hands of the user. Once the user confirms a choice (whether it’s a file selection in the Open file panel, a click on the Save button in the Save file panel, or a click on the Can- cel ... in either type of panel), a message is automatically sent by the system to the panel’s target. By default the panel’s target is the application object, but this can be changed (either in the BFilePanel...

Ngày tải lên: 20/10/2013, 10:15

... 0); // Close the files close(infd); close(outfd); Figure 6-36. A program fragment for copying a file using the UNIX system calls. This fragment is in C because Java hides the low-level system calls ... hardware) Context Valid Physical page Virtual page tag Flags (b) (c) Format is entirely defined by the operating system Translation table (Operating system) TSB (MMU + sofware) Context Entry 0 is shared by all virtual pages ending ... main class p = new producer( ); // create the producer c = new consumer( ); // create the consumer p.start( ); // start the producer c.start( ); // start the consumer } // This is a utility function...

Ngày tải lên: 12/12/2013, 09:15

... stop there, and will never check if you have 2 ethernet cards. The trick is to tell the ethernet driver that there are 2 cards in the system. The following line will tell the kernel that there ... reboot. 100 Linux Tips and Tricks 10 Tip 1: Detecting 2 ethernet cards To configure an ethernet card in Linux, you need to enable it in the kernel. Then the kernel will detect your ethernet card ... first mounting the root file system. • The drive is not ready. If you have removed the drive, the hard disk died or the BIOS didn't detect the device for some reason, then the kernel won't...

Ngày tải lên: 21/12/2013, 04:18