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- How to view all currently logged in users in Linux system
- Today we will briefly introduce several methods to list logged in users in a Linux system. In a multi-user Linux system, sometimes there is a need to query the users currently logged in to the system. For example, a user needs to be logged out for some reason. Today we will briefly introduce several methods to list logged in users in a Linux system. Among the methods we have introduced, almost all commands rely on data that exists in the /var or /proc directory. If you know anything about directory structure in Linux, you will know that these two directories contain data about the processes running on the system. 1. Use the w command to view the logged-in users in the Linux system. This is the simplest method. You only need to type a letter command to query the current username.
- LINUX 1108 2024-02-13 10:39:31
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- Learn Vim8 simply and improve Linux code editing efficiency!
- As a Linux developer, do you often feel that you are not efficient when editing code, or do you hope to have a better code editor to improve work efficiency? If so, then you need to learn Vim8! Vim8 is a very powerful code editor and it is widely regarded as one of the best editors on Linux systems. Now, let us learn how to use Vim8 to improve our code editing efficiency. 1. First, install all necessary libraries including Git. For a Debian-like Linux distribution, such as Ubuntu, the command is as follows: sudoapt-getinstalllibncurses5-devlibgnome2-d
- LINUX 880 2024-02-13 10:39:02
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- Device files in Linux systems: inode, file and file_operations
- A device file is a special file in the Linux system. It is used to represent the interface of the device so that user space programs can access the device through file operations. The implementation of device files involves three important structures: inode, file and file_operations. The inode structure is used to store metadata of device files, such as device number, permissions, size, etc. The file structure is used to store status information of device files, such as current location, open mode, private data, etc. The file_operations structure is used to store device file operation functions, such as open, read, write, close, etc. In this article, we will introduce the definition and function of these three structures
- LINUX 587 2024-02-13 10:20:38
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- Solutions and steps for failed installation of arpspoof on CentOS
- LINUX is a widely used open source operating system. It has stability, security and powerful customization capabilities. CentOS is a popular distribution version of LINUX operating system and is widely used in servers and network equipment. arpspoof is a commonly used A network security tool used to spoof the ARP protocol of the target host to conduct man-in-the-middle attacks. Reasons for arpspoof installation failure: Installing arpspoof on CentOS may encounter some problems, causing the installation to fail. These problems may include: 1. Lack of relevant dependent libraries 2. Incorrect or inaccessible source address 3. Insufficient system permissions Solutions and Below are the steps to install arpspoof on CentOS.
- LINUX 972 2024-02-13 10:20:29
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- A Linux command artifact running on Windows-Cmder
- 1. Introduction Many engineers are accustomed to using Linux to issue some commands, and it is simply unbearable to use Windows cmd again. To run Linux commands on Windows, the currently popular methods include: GunWin32, Cygwin, WSL (BashonWindows), GitBash, and PowerShell. WSL: Cygwin: GitBash: PowerShell or simply install a virtual machine and install ubuntu inside it. Today, I will introduce to the students a god-level command line tool for Windows - Cmder. 2. CmderCmder is a command line tool for Windows.
- LINUX 975 2024-02-13 09:57:03
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- Backup is that simple: teach you how to use Linux rsync command easily
- In daily use of modern computers, data backup is particularly important. For Linux users, the rsync command is a common method for backing up and synchronizing files. It enables fast and efficient data synchronization between different systems or local folders. Solution background: Data synchronization is required between server A and server B (either 1-to-1 or many-to-many, here is a simple 1-to-1 example). This solution is often used for remote disaster recovery. There are roughly two types of synchronization solutions based on application scenarios, scheduled synchronization and real-time synchronization. Scheduled synchronization has the characteristics of fixed synchronization time, poor real-time performance, and low resource consumption; real-time synchronization has the characteristics of strong real-time performance, intensive synchronization, and high resource consumption. 1. Scheduled synchronization 1. Install software: yuminstallr
- LINUX 1139 2024-02-13 09:33:02
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- CentOS Alien installation and CentOS installation Installation Source
- As a Linux enthusiast, we often need to install different software packages and tools to meet our needs. In CentOS systems, there are two common installation methods: installing through CentOSAlien and installing InstallationSource through CentOS. This article will introduce these in detail Two installation methods and their usage and precautions. CentOSAlien installation CentOSAlien is a tool for installing Debian packages on CentOS systems. Using CentOSAlien, we can convert Debian packages to CentOS packages and install them on CentOS systems. The following is C
- LINUX 992 2024-02-13 09:30:27
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- Installation of Tongxin UOS system on mobile phone
- Here I will introduce to you how to install the UOS system on your mobile phone. UOS is a domestic operating system based on the Linux kernel. It has the advantages of stability, security and ease of use. It is widely used in desktops, servers and other fields. Installing the UOS system on a mobile phone allows us to better understand and experience this excellent domestic operating system. Installation steps 1. We need to download the mobile version image file of UOS, which can be downloaded from the official website or community forum. 2. After the download is completed, connect the phone to the computer and copy the image file to the phone's storage device. 3. Next, we need to use the flash tool on the phone to flash the Tongxin UOS system into the phone. The specific flashing steps may vary depending on the phone model.
- LINUX 857 2024-02-13 09:30:18
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- How to use Sleep and Wait commands in Linux system
- The sleep and wait commands in Linux allow you to run commands at a selected speed or capture and display the exit status of a task after waiting for it to complete. sleep simply inserts a timed pause between commands, while the wait command notifies it of completion until it completes. Sleep command The sleep command will pause for the specified time. It is typically used in scripts, but can also be used from the command line. In the example below, sleep pauses for 30 seconds between two date commands. [root@localhost~]#date;sleep30;dateThuNov1105:06:44EST2021ThuNov1105:07:14EST20
- LINUX 817 2024-02-13 09:30:14
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- How to disable the ping command in Linux system?
- In Linux systems, the ping command is usually used to test network connections and detect network delays. However, sometimes we find that in some Linux systems, the ping command prompts that the permissions are insufficient or even unavailable. Why does this happen? What exactly causes the ping command to be disabled? How to solve this problem? In this article, we will explore the reasons why the ping command is disabled and how to fix it. 1. Kernel parameter settings 1. Allow ping to set temporary echo0>/proc/sys/net/ipv4/icmp_echo_ignore_all permanent echonet.ipv4.icmp_echo_ignore_all=
- LINUX 682 2024-02-13 09:27:12
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- Detailed explanation of the basics of IPsec installation and source settings under CentOS
- As the demand for network security continues to increase, IPsec, as a common security protocol, is widely used in various network environments. This article will introduce in detail how to install IPsec under the CentOS system, and discuss how to set up the CentOS software source to Meet different usage needs. IPsec installation steps 1. Update system: Update your CentOS system using the following command: ```shellsudoyumupdate``` 2. Install IPsec tools: In CentOS, you can install racoon and ipsec-tools using the following command: sudoyuminstallracoonipsec-tools 3. Configuration IPsec
- LINUX 902 2024-02-13 09:15:07
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- Install CentOS on 8100 and install Black Group on 8100
- LINUX is a free and open source operating system that is widely used in servers and personal computers. CentOS is an operating system based on Red Hat Enterprise Linux (RHEL) source code, while Black Group is an operating system used for network storage. Operating system, this article will introduce how to install CentOS on 8100 and how to install Black Synology on 8100. Installing CentOS on 8100 In order to install CentOS on 8100, you need to prepare the following items: 1. A computer running Windows or Linux 2. An available USB flash drive (at least 8GB) 3. The latest version of CentOS ISO image file 4.
- LINUX 850 2024-02-13 09:10:09
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- Use Linux AWK commands to make data processing more efficient!
- In Linux systems, we often need to process and analyze data in various formats. At this time, a simple and powerful tool comes in handy - AWK. AWK is a text processing tool that can quickly process text files and is very suitable for various tasks such as log analysis, data extraction, and statistical reports. In this article, we will introduce you to the basic usage and common application scenarios of AWK, so that you can easily master this data processing tool. 0. Basic usage awk is a powerful text analysis tool. Simply put, awk reads the file line by line. (Space, tab) is the default delimiter to slice each line, and then perform various analyzes on the cut parts. The format of processing awk command is as follows awk[-Ffield
- LINUX 858 2024-02-13 08:48:11
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- Linux IPC System V Shared Memory: An Advanced Approach to High-Speed Data Exchange
- The Linux system is an operating system that supports concurrent execution of multiple tasks. It can run multiple processes at the same time, thereby improving system utilization and efficiency. However, if data exchange and collaboration are required between these processes, some inter-process communication (IPC) methods need to be used, such as signals, message queues, semaphores, etc. Among them, SystemV shared memory is a relatively advanced and high-speed IPC method. It allows two or more processes to exchange data through a memory area without data copying and conversion. This article will introduce the SystemV shared memory method in Linux systems, including the creation, mapping, reading, writing, unmapping and deletion of shared memory. model#include#incl
- LINUX 1239 2024-02-13 08:30:32
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- Revealing the secrets of WebLogic 12c: Stable and high performance, worry-free security protection
- 1.What is WebLogic12c? What are the characteristics? OracleWebLogicServer12c is an excellent application server carefully developed by Oracle based on JavaEE. Its powerful scalability, stable and ultra-high performance, and strict security protection make this server the first choice for large-scale enterprise applications. 2. How to install WebLogic12c? First, confirm that you have downloaded the Weblogic12c installation program linuxfind and meet the required operating system environment. Then, follow the following steps to start the deployment: Step 1: Unzip the installation file. Step 2: Run the installer. Step 3: Follow the installation wizard prompts to set up and configure. Step 4: Complete the installation
- LINUX 786 2024-02-13 08:30:18
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