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- Add a new hard drive to a Linux guest without restarting the virtual machine
- As a system administrator, I often need additional hard drives to expand storage space or separate system data from user data. I will show you how to add a hard disk on a host to a Linux guest virtualized using VMWare software in the process of adding a physical block device to the virtual host. You can explicitly add or remove a SCSI device, or rescan the entire SCSI bus without restarting the Linux virtual machine. This guide has been tested in VmwareServer and VmwareWorkstationv6.0 (older versions should also be supported). All commands in RHEL, Fedora, CentOS and UbuntuLinux clients
- LINUX 913 2024-04-03 16:34:11
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- 12 common IP commands in the iproute installation package
- Year after year, we have been using the ifconfig command to perform network-related tasks, such as checking and configuring network card information. But ifconfig is no longer maintained and has been deprecated in recent versions of Linux! The ifconfig command has been replaced by the ip command. The ip command is somewhat similar to the ifconfig command, but it is much more powerful and has many new functions. The ip command completes many tasks that the ifconfig command cannot. This tutorial will discuss the 12 most common uses of the ip command, so let’s get started. Case 1: Check the network card information. Check the network information such as IP address, subnet and other network card information. Use the ipaddrshow command: [linuxtechi@
- LINUX 474 2024-04-03 13:52:01
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- Chicken and rabbit in the same cage - detailed explanation of the algorithm
- Let’s talk about the importance of algorithms with the help of teacher Kaifu Li: “Algorithms are one of the most important cornerstones in the field of computer science, but they have been ignored by some domestic programmers. Many students have seen that some companies require a variety of programming languages when recruiting. There is a misunderstanding that learning computers means learning various programming languages, or that learning the latest languages, technologies, and standards is the best way to pave the way. In fact, everyone has been misled by these companies. Although programming languages should be learned, But learning computer algorithms and theories is more important, because computer languages and development platforms are changing with each passing day, but what remains the same are those algorithms and theories, such as data structures, algorithms, compilation principles, and computer architecture. , relational database original
- LINUX 697 2024-04-03 09:55:01
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- How the Linux file system works: Everything in the index node and directory entry is a file
- How the Linux file system works Index nodes and directory entries Everything in Linux is a file. Ordinary files, directories, block devices, sockets, and pipes must also be managed through a unified file system. Linux allocates two data structures to each file, an index node and a directory entry, which are mainly used to record the meta-information and directory structure of the file. The index node is the unique identifier of each file. The directory entry maintains the tree structure of the file system. The relationship between the directory entry and the index node is many-to-one. It can be simply understood as: a file can have multiple names. The aliases created for files through hard links will correspond to different directory entries. Such directory entries are essentially still linked to the same file, so their index nodes are the same. The smallest unit of the c drive is a track (512B), however
- LINUX 477 2024-04-03 09:16:01
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- How to deal with Chinese characters in Linux that are different from Windows
- This article introduces the relevant knowledge of "how to correctly handle garbled files in Linux". During the operation of actual cases, linux files are garbled, linux files are garbled, linux version of qq, many people will encounter such a dilemma, and let them know. The editor will lead you to learn how to deal with this situation! I hope you will read it carefully and learn a lot! Linux is different from windows. Linux servers only support numbers, English and other characters, and cannot recognize English characters. Therefore, after we decompress the packaged and uploaded files, English garbled files and folders appear. When the file name is garbled, the file name cannot be input through the mouse, so the file cannot be managed directly with the help of rm, mv and other commands in the terminal. and
- LINUX 1039 2024-04-03 08:31:15
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- The best Linux version of 2024: perfect integration of technology and art, open and innovative attitude towards life
- As a Linux enthusiast in 2024, my expectations for the best Linux distribution are exciting. Below, I will explain my personal views and analyze why the most attractive Linux distribution in 2024 has many unique advantages. 1. First introduction to the most beautiful Linux distribution. There is no doubt that the best Linux distribution in 2024 can be called the perfect fusion of technology and art. It has excellent performance in many aspects such as user interface, function planning and performance optimization, making it unique in the face of many competitors. This is not only an operating system, but also a symbol of a free, open and innovative attitude towards life. This optimal version incorporates a new design and interactive mode, which is bound to be refreshing. Whether it is layout structure, logo pattern or color matching,
- LINUX 638 2024-04-03 08:01:01
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- Common examples of tcpdump
- tcpdump is a very commonly used network packet analysis tool that can be used to display TCP/IP and other network data packets transmitted to the system through the network. tcpdump uses the libpcap library to capture network packets. This library is available in almost all Linux/Unix. tcpdump can read the contents from the network card or a previously created packet file, or it can write the packets to a file for subsequent use. You must be root or use sudo privileges to run tcpdump. In this article, we will demonstrate how to use the tcpdump command through some examples, but first let us take a look at how to install tcpdump in various Linux operating systems. Install
- LINUX 838 2024-04-02 09:19:10
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- The order in which underlying hardware device drivers are inserted into the linked list (driver)
- What are drivers: Drivers encapsulate the operations of underlying hardware devices and provide function sockets to the lower layers. Device classification: The Linux system divides devices into three categories: character devices, block devices, and network devices. Character device: refers to a device that can only read and write byte by byte. It cannot randomly read a certain data in the device's video memory. Data must be read in order. Character devices are stream-oriented device Linux driver development. Common character devices include mice, keyboards, serial ports, consoles, and LED devices. Block device: refers to a device that can read a certain thickness of data from any location on the device. Block devices include hard drives, disks, USB flash drives, SD cards, etc. Network device: A network device can be a hardware device, such as a network card; but it can also be a pure
- LINUX 1212 2024-04-02 09:10:02
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- Linux files are garbled. 'Linux common commands' is a simple, fast and practical method to operate.
- The content of this article mainly explains "How to solve the problem of garbled files under the Linux operating system". Interested students may wish to take a look. The method introduced in this article is simple, fast and practical to remove garbled Linux files. Let the editor take you to learn "how to solve the problem of garbled files under the Linux operating system"! The original Windows rar compressed file LINUX community, after decompressing it under the Linux system and opening the next file, the contents are all garbled. The reason for the garbled characters is that some of the compressed files are named in English. The encoding of English under Windows is usually gbk, and the encoding of English under Linux is usually utf8, so it can be opened normally under Windows.
- LINUX 760 2024-04-02 08:13:01
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- The most famous text adventure game – Giant Cave Adventure
- ColossalCaveAdventure[1], also known as ADVENT, ClossalCave or Adventure, is the most popular text-based adventure game from the early 1980s to the late 1990s. The game is also known as the first "interactive fiction" game in history. In 1976, a programmer named Will Crowther developed an early version of the game, and later another programmer named Don Woods improved the game, adding many new elements to it, including a scoring system and more fantasy characters and settings. The game was originally developed for the PDP-10, a
- LINUX 548 2024-04-01 19:58:19
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- The big secret of Python version upgrade: backup, update, and problem solving all in one place
- As technical talents who are proficient in Linux systems, in order to meet the growing development needs and fix security risks in older versions, we often need to update and upgrade the Python version. This article provides an in-depth discussion on this topic, including the preparations involved, the specific implementation steps of various upgrade methods, potential problems and their corresponding strategies, etc. The purpose is to provide readers with a clear and easy-to-understand guide to Linux training to help You successfully upgraded the Python version. Preparations Before upgrading the Python version, necessary preparations must be made to ensure that the process is correct. First of all, it is important to clearly understand the existing Python version and its dependencies. You can find out which Python you are currently using by running the following command
- LINUX 1300 2024-04-01 08:01:31
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- CentOS yum installation JDK
- 1. Check the jdk version currently supported for installation on the cloud [root@localhost~]#yumsearchjava|grepjdkldapjdk-javadoc.noarch:Javadocforldapjdkjava-1.6.0-openjdk.x86_64:OpenJDKRuntimeEnvironmentjava-1.6.0-openjdk-demo.x86_64:OpenJDKDemosjava-1.6 .0-openjdk-devel.x86_64:OpenJDKDevelopmentEnvironme
- LINUX 794 2024-03-31 16:41:01
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- Detailed explanation of iptraf command in Linux
- iptraf is an IP LAN monitoring tool developed based on ncurses. It can monitor network card traffic in real time and generate various network statistics, including TCP information, UDP statistics, ICMP and OSPF information, Ethernet load information, node statistics, and IP calibration. checksum errors and other information. The parameter list of iptraf. Adding different parameters after iptraf can play different roles. The following is the parameter command list of iptraf: Note: Open the command line window and use iptraf to be told that you need to run as an administrator. Switch from ordinary user to Administrator users only need to execute the command sudosu. As shown in the figure below, Figure 1 is the prompt message before switching to the administrator identity.
- LINUX 489 2024-03-31 09:46:06
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- loadrunner linux LoadRunner performance testing on Linux: challenges and practice
- Recently, an increasing number of software testing engineers have raised concerns about the performance evaluation of LoadRunner in Linux systems. As the industry's leading performance testing tool, LoadRunner has received unanimous praise for its widespread adoption in Windows environments, but its application in Linux systems has triggered heated discussions. This article will delve into the actual application of LoadRunner in Linux systems, specifically involving key issues such as its installation settings, adaptation capabilities, and performance results, thereby helping readers have a more comprehensive and in-depth understanding of the current situation in this field. Introduction to LoadRunner First, it is crucial to understand LoadRunner. This is developed by MicroFocus
- LINUX 672 2024-03-30 22:41:24
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- File I/O programming under Linux
- (1) .open() opens the file #include#include#includeintopen(constchar*pathname,intflags); Parameter 1: pathname, the path where the file is located Parameter 2: flags, file permissions, relative to the program process, common macros are: O_WRONLY, O_RDONLY ,O_RDWR,O_EXCL,O_APPEND,O_DUMP Parameter 3: mode, used when creating a file, usually the value of umask. Return value: Returns the file descriptor successfully, otherwise returns -1
- LINUX 393 2024-03-30 21:31:11
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