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- What is the principle of linux operating system
- Title: An in-depth exploration of the principles and code examples of the Linux operating system Introduction: The Linux operating system has been widely used in the computer field due to its advantages such as stability, security, and open source. This article will deeply explore the principles of the Linux operating system, including process management, file system, memory management, etc., and attach specific code examples to help readers better understand the working principle of the Linux operating system. 1. Process Management Process is the basic unit that runs as a program in the Linux operating system. Linux pass process
- LINUX 507 2024-02-21 09:36:04
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- The upper limit of the number of Linux file handles is one of the important factors of the operating system
- The upper limit of the number of Linux file handles is an important resource of the operating system in the file system. A file handle refers to a series of elements maintained by the operating system on a file, allowing processes to access files by constructing relationships between files. The upper limit on the number of file handles limits the maximum number of files that a process can handle at the same time. The default value for the upper limit of Linux file handles depends on the file system used, but usually the default value is set at 2048 or 4096. This value can be adjusted by changing the upper limit setting option for the number of file handles in /etc/sysctl.conf: "`shellfs.file-max=65536. The specified upper limit for the number of file handles will not take effect until the system is restarted. Previously, it could be passed
- LINUX 845 2024-02-21 09:27:13
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- Foreign linux server RedHat: Red Hat Enterprise Linux (RHEL) starts from shouting
- As you know, many data center servers run Linux, which can save a lot of license fees and maintenance costs. But in the face of many Linux distributions, the sudden question is archlinux. Which Linux distribution will you choose as the server operating system? Here is a list of the top 10 most popular Linux server distributions and foreign Linux servers. In fact, you may not have heard of several of them. In the list below, there is no special ranking. The main criteria for inclusion in this list are: ease of use, commercial support and data center reliability. Ubuntu: Top of the list for almost all Linux related products, based on Debian
- LINUX 1169 2024-02-21 08:36:53
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- How to use less command in Linux
- Usage of less command in Linux requires specific code examples Linux is a widely used operating system that uses a command line interface to interact with computers. In Linux, there are many commands to help users view and operate files. One of the very useful commands is less. The less command is a file viewer that allows users to view the contents of a file page by page without loading the entire file. Compared with the traditional cat command, the less command can browse large files more conveniently.
- LINUX 1443 2024-02-20 19:51:04
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- Ubuntu dual-line dual-network card dual-IP configuration method
- Ubuntu dual-line dual-network card dual-IP configuration method requires specific code examples. Ubuntu is a popular open source operating system that can be used in desktop and server environments. Configuring dual lines, dual network cards and dual IP can achieve network load balancing and redundancy backup, improving network reliability and performance. This article will introduce how to configure dual-line dual-network card dual-IP in Ubuntu system and provide specific code examples. First, we need to check the network card devices available in the system. Open a terminal and run the following command: $ifconfig
- LINUX 1326 2024-02-20 18:03:03
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- What is routing and switching in Linux
- What are routing and switching in Linux? Specific code examples are needed. In computer networks, routing and switching are two important concepts. As an open source operating system, Linux has been widely used in the network field. In Linux, routing and switching are implemented through some specific functional modules and tools. This article will introduce the concepts of routing and switching in Linux and give relevant code examples. 1. Routing Routing refers to the process of finding the best path to a destination in the network. In Linux, there are many
- LINUX 1195 2024-02-20 16:18:03
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- Simply put, max-file represents the file handle that can be opened at the system level.
- Simply put, max-file represents the number of file handles that can be opened at the system level, while ulimit-n controls the number of file handles that can be opened at the process level. Man5proc found the explanation of file-max: file-max specifies the system The limit on the number of file handles that can be opened by all processes within the scope (system level, kernel-level). (Thevalueinfile-maxdenotesthemaximumnumberoffilehandlesthattheLinuxkernelwillallocate). When receiving "Toomanyopenfilesinsys"
- LINUX 794 2024-02-20 11:40:27
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- Linux hardware configuration revealed, do you really understand it?
- Understanding and mastering hardware configuration is essential for daily use of Linux operating systems. Because different hardware choices will directly affect the performance and stability of the system. Therefore, you need to learn to accurately detect and compare hardware combinations. The following shows you in detail how to view hardware information under a Linux system and evaluates and compares various common industry practices. 1. The lshw command is here to recommend LSHW, an excellent tool to everyone. How to check the hardware configuration of the Linux system. It can display all the characteristics of the computer hardware in detail, such as the CPU, memory, hard disk and network card mentioned above. . You may wish to try this small command in the terminal! ```sudolshw-short can display the system
- LINUX 426 2024-02-20 11:27:20
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- Quick terminal session sharing tool:tmate
- What is tmate? tmate means teammates, which is a fork of tmux and uses the same configuration information (such as shortcut key configuration, color scheme, etc.). It is a terminal multiplexer with the ability to share terminals on the fly. It allows the creation and manipulation of multiple terminals from a single screen, which can also be shared with other colleagues. You can detach the session, let the job run in the background, and then reconnect to the session when you want to view the status. tmate provides an instant pairing solution that allows you to share a terminal with one or more teammates. There is a status bar on the screen that displays some shared information such as ssh commands for the current session. How does tmate work? transport
- LINUX 1267 2024-02-20 11:04:14
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- Linux memory being eaten
- This is the difference between Windows and Linux in memory management. At first glance, the Linux system eats up our memory (Linuxatemyram), but in fact this is also the characteristic of its memory management. Free command introduction The following is the result of using the free command to view the memory of our laboratory file server. The -m option indicates the use of MB as the unit: the second line of output indicates the system memory usage: Mem: total (total) = 3920MB, used (used) = 1938MB, free (idle) = 1982MB, shared (shared memory) = 0MB, buffers = 497MB, cached = 1235MB Note: the first four
- LINUX 769 2024-02-20 10:48:10
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- Reasons for Linux permission denied exception
- The Linux operating system is an open source operating system that is widely used on various devices such as servers and personal computers. When using Linux, you often encounter "PermissionDenied" exceptions. This article will explore the causes of this exception and give specific code examples. Each file and directory in Linux has corresponding permission settings to control the user's read, write and execution permissions. Permissions are divided into three levels: user permissions, group permissions and other user permissions. When used
- LINUX 1501 2024-02-20 10:43:05
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- How to use split command in Linux
- How to use the split command in Linux, specific code examples In the Linux system, the split command is a very useful tool. It can be used to split a large file into multiple small files, and can be divided into multiple small files according to the specified size, number of lines or bytes. Divide the number. This article will introduce the usage of split command and provide specific code examples. The basic syntax of the split command is as follows: split [option] file name [output file name prefix] Next, we will introduce the split command in detail
- LINUX 1347 2024-02-20 09:29:36
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- What is a file handle in Windows? How is it done?
- What are file handles? 1. Question 1: What are file handles? In file I/O, to read data from a file, the application must first call the operating system function and transfer the file name, and select a path to the file. to open the file. This function gets back a sequence number, that is, the file handle (filehandle), which is the only basis for identification of the open file. 2. The handle is a special smart watch needle. When an application wants to reference a memory block or object managed by another system (such as a database, operating system), a handle is used. 2. The foundation of the entire Windows programming. 3. A handle is a (generally 32-bit) integer that represents an object. Handles in Windows are like traditional C or
- LINUX 856 2024-02-20 09:06:36
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- A complete guide to Linux application development, from installation to debugging
- 1. How to start Linux application development? Before embarking on Linux application development, you need to first install a Linux system, and you can choose mainstream versions such as Ubuntu and Fedora. After the driver is successfully driven, you can use programming languages such as C/C++ to create applications. 2. How to compile and run Linux applications? In order to successfully compile and run Linux applications, we need to use the gcc compiler built into the GNU toolset. First, enter the "gcc" command in the terminal to convert the source code into an executable file; next, enter the "./" directive to start and run the generated executable file. 3. How to debug Linux applications
- LINUX 1209 2024-02-20 09:01:23
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- Usage of find commandLinux
- The find command is a powerful file search tool commonly used in Linux systems. It can search for files in a specified directory based on specified conditions and return a list of files that meet the conditions. The basic syntax of the find command is as follows: find [path...] [expression] where path represents the directory path to be searched, and one or more directories can be specified. expression is an expression composed of various options and test conditions, used to specify search rules and conditions. Down
- LINUX 984 2024-02-20 08:27:35
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