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- Application system settings of user and user group files in Linux
- ID: ChinaUnix20131, user and user group files In Linux, user accounts, user passwords, user group information and user group passwords are all stored in different configuration files. In the Linux system, the created user account and its related information (except password) are stored in the /etc/passwd configuration file. Because all users have read permissions on the passwd file, the password information is not saved in the file, but in the /etc/shadow configuration file. In the passwd file, one line defines a user account. Each line is composed of multiple different arrays. The values of each array are separated by ":". Each array represents a certain aspect of the account's information.
- LINUX 1247 2024-04-05 09:10:02
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- Nexus private server easily retrieves account
- 1Stop the nexus service [root@node001bin]#/usr/local/nexus/nexus-2.14.5-02/bin/nexusstop********************** ******************WARNING-NOTRECOMMENDEDTORUNASROOT****************************** *************StoppingNexusOSS...StoppedNexusOSS.2 Enter the directory and modify the configuration file [root@node001~]#
- LINUX 787 2024-04-05 09:04:19
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- A must-have for Linux terminals! The secret of driver-free wireless network card
- 1. Background of Linux driver-free wireless network card In the current era of digital informatization, wireless networks have been integrated into our daily lives and have become an indispensable part. For Linux terminal users, a wireless network card with excellent compatibility and excellent stability is particularly critical. Therefore, the driver-free version of the wireless network card is very popular among users for its convenience, speed and remarkable effects. This kind of driver-free wireless network card not only saves the tedious steps of installing drivers in a Linux system environment, but also brings a better user experience. In the past, although the Linux system provided support for some brands or models of wireless network cards, some network cards still faced driver problems, causing trouble to users. However, thanks to science
- LINUX 1428 2024-04-05 08:19:11
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- Even a Linux novice can understand it in seconds! Easily check which JDK versions are installed on your Linux system
- As a Linux system administrator or developer, knowing how to check the Java Development Kit (JDK for short) version will be of great benefit to your work progress. With a series of efficient commands and operating procedures, you can easily grasp the version information of the JDK installed in the Linux system. This article will provide a detailed analysis of querying and confirming the selected JDK version in the Linux environment, displaying a list of all installed JDKs, and the specific steps for setting and converting different versions of JDK. 1. Check the default JDK version. In the Linux environment, OpenJDK is often pre-installed as the default Java development kit. If you want to know the JDK version installed by default on the system, you can use the following related commands to check: bashj
- LINUX 1462 2024-04-04 09:10:01
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- Linux stand-alone log audit
- 1: First check whether sudo and rsyslog services are installed. 2: If the service is not found, you can use yum to install related services. 3: Add content to the /etc/rsylog.conf file. 4: Check the content. After completing the above four steps, stand-alone log auditing is simple. Completed, if someone uses the sudo command to operate, we will check the log file to monitor the operation command and explain: This setting will only monitor when other users use the sudo command, but will not monitor other ordinary operations.
- LINUX 607 2024-04-04 09:01:20
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- Open source performance appraisal system: innovative performance evaluation, transparent, fair and cost-win-win
- 1. The concept of open source performance appraisal system. The open source performance appraisal system uses open source technology and community sharing concepts to provide organizations with independent customization and management evaluation process functions, allowing enterprises to make objective, fair and scientific personal performance evaluations. This system not only helps enterprises improve internal management efficiency, but also helps stimulate collaboration and competition among employees, thereby driving further improvements in the performance of the overall organization. In a modern society with highly developed informatization, many companies have discovered the limitations of traditional performance considerations. In this regard, the open source performance appraisal system emerged as an innovative solution strategy. Using open source technology, companies can break through the limitations of the traditional closed management model, improve the sensitivity and efficiency of employee performance evaluation, and ensure a fair evaluation process.
- LINUX 1406 2024-04-04 08:30:02
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- How to deploy applications to embedded Linux?
- Abstract: AWTK is a universal GUI engine developed by ZLG that can run on various operating systems. It has been favored by more and more developers and users since its release. AWTK is suitable for the embedded field. This article will explain how to deploy AWTK applications into the embedded development environment. AWTK has already been transplanted on multiple embedded platforms and provides corresponding template projects, such as: embedded Linux, AWorksOS, RT1052 bare system and STM32 bare system, etc. After the AWTK application is debugged in Windows, it is very convenient to deploy it to this embedded development environment. It only requires a few simple steps. Please see below for the specific content. Below we will use HelloDesigner-
- LINUX 1145 2024-04-04 08:01:05
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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 1100 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 636 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 830 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 619 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 1157 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 1031 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 1204 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 1428 2024-04-02 09:10:02
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