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- Easily master Linux storage parsing and partitioning skills
- When using the Linux operating system, we often need to manage and configure storage devices. Among them, the resolution and partitioning of storage devices is one of the common management tasks. Understanding how to perform storage parsing and partitioning can help us better utilize storage resources and improve system performance. This article will introduce the relevant knowledge of storage device parsing and partitioning in Linux systems. When using C/C++ for multi-threaded programming in Linux systems, the most common problem we encounter is multi-threaded reading and writing of the same variable. In most cases, such problems are dealt with through the lock mechanism, but this is very important for programs. has a great impact on performance. Of course, for those data types that the system natively supports atomic operations, we can use atomic operations to process them.
- LINUX 676 2024-02-12 15:54:11
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- Linux IPC System V Message Queuing: A Classic Way to Reliable Message Delivery
- 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, shared memory, semaphores, etc. Among them, SystemV message queue is a relatively classic and reliable IPC method. It allows two or more processes to transmit messages through a queue without caring about the content and format of the message. This article will introduce the method of SystemV message queue in Linux system, including the creation, opening, sending, receiving, closing and deletion of message queue. model#include#incl
- LINUX 1201 2024-02-12 15:33:15
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- Linux performance tuning~
- The Linux operating system is an open source product, and it is also a practice and application platform for open source software. Under this platform, there are countless open source software supports, such as apache, tomcat, mysql, php, etc. The biggest concept of open source software is freedom and openness. Therefore, as an open source platform, Linux's goal is to achieve optimal application performance at the lowest cost through the support of these open source software. When it comes to performance issues, what is mainly achieved is the best combination of the Linux operating system and applications. 1. Overview of performance issues System performance refers to the effectiveness, stability and response speed of the operating system in completing tasks. Linux system administrators may often encounter problems such as system instability and slow response speed, such as
- LINUX 786 2024-02-12 15:30:04
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- Linux Intermediate - 'Driver' Low-level knowledge that must be learned to control hardware
- Driver awareness 1. What is a driver? A driver encapsulates the operations of underlying hardware devices and provides functional interfaces to the upper layer. 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 memory. The data needs to be read in order. Character devices are stream-oriented devices. Common character devices include mice, keyboards, serial ports, consoles, and LED devices. Character device drivers usually implement at least open, close, read, and write system calls. Character terminals (/dev /console) and the serial port (/dev/ttyS0 and similar devices) are
- LINUX 1315 2024-02-12 15:21:13
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- How to find a file in Linux
- For newbies, using the command line in Linux can be very inconvenient. Without a graphical interface, it is difficult to browse between different folders and find the files you need. In this tutorial, I will show you how to find a specific file in Linux. The first step is to connect to your Linux via SSH. There are two ways to find files in Linux. One is to use the find command, and the other is to use the locate command. find command Use the Linux find command to search the directory tree using different search criteria such as name, type, owner, size, etc. The basic syntax is as follows: #findpathexpressionsearch-term The following is the basis for using the find command
- LINUX 679 2024-02-12 15:20:16
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- Fast and easy file transfer – learn about Linux TFTP
- In Linux systems, we often need to transfer files. However, although file transfer can be achieved using the traditional FTP protocol, the configuration process is relatively complex and is not suitable for quick and easy file transfer. So, is there a more convenient and faster way to transfer files? The answer is yes - it is TFTP. Did you know there's a simpler alternative to the popular file transfer protocol? It's TFTP, and here's how to set it up on Linux. TFTP (TrivialFileTransferProtocol, Simple File Transfer Protocol) was first defined in 1980. It is a fairly old protocol, introduced in June 1981 by Karen R.Sollins
- LINUX 1447 2024-02-12 15:15:11
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- How to install and use HTTPie and HTTP Prompt on Linux
- HTTPie is a command line HTTP client built for modern web APIs. It provides intuitive commands and user-friendly interface. In this guide, you'll learn about HTTPie's features and how it compares to cURL. You will also learn how to install and start using HTTPie on your Linux system. Before you begin, please create an account if you have not done so already. Follow our guide to setting up and securing a compute instance to update your system. You may also want to set the time zone, configure the hostname, create a limited user account, and enforce SSH access. Please note that the steps in this guide are written for non-root users. Commands that require elevated privileges are prefixed with sudo. If you are not familiar with sudo commands,
- LINUX 780 2024-02-12 15:03:23
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- How to monitor Linux with a 10-line bash shell script?
- Monitoring our environment is critical to server operations, especially when deploying new applications. Today, many companies use open source solutions every day to monitor system resources. However, bash scripts come in handy when we need test monitoring over a period of time. In this tutorial, we will write a bashshell script that will output a three-column table showing the percentage usage of memory, disk, and CPU on our computer. let's start! This script mainly consists of three parts: 1. Monitor memory: free-m|awk'NR==2{printf"%.2f%%\t\t",$3*100/$2}'9.24%free-m is used to display the used and
- LINUX 1331 2024-02-12 15:03:04
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- Linux file sharing artifact: usage and advantages of shar
- If you often need to send and receive multiple files in your Linux system, you may run into some trouble. You may need to compress the file into tar, gz, zip, etc. format, and then send it to your contacts. However, your contact may not know how to decompress these files or need to install additional programs to process them. Is there an easier and more convenient way to share Linux files? The answer is yes, that is to use the shar tool. shar is a command line tool that can "package" multiple files into an executable script file. If you send this file to your contacts, they just need to make sure it has execute permissions and then run it to automatically extract the original file. No complicated commands,
- LINUX 1010 2024-02-12 15:00:04
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- Ubuntu system disk partition scheme design and practical experience sharing
- As an open source operating system, Ubuntu is very popular on both servers and personal computers. Disk partitioning is a very important step when installing Ubuntu. A reasonable disk partitioning scheme can improve the performance and stability of the system, and at the same time To better manage data and files, this article will share some experience in the design and practice of Ubuntu system disk partitioning scheme, and how to partition the disk on Ubuntu20.04. Ubuntu20.04 disk partition Ubuntu20.04 is the latest long-term support version, which introduces many new features and improvements. Before doing disk partitioning, we first need to understand some basic concepts. 1. Primary partition and extended partition: The primary partition is used to install
- LINUX 1164 2024-02-12 14:54:18
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- Easy installation of Tongxin uos single system: detailed guide and practical suggestions
- With the development of science and technology, more and more people are beginning to choose to use domestic operating systems. As one of the well-known domestic operating systems, Tongxin uos has been favored by the majority of users. This article will provide you with detailed information on Tongxin uos single system. Installation guide to help you complete the installation process easily. Preparation 1. Download the UOS installation image file. You can obtain the image file from the UOS official website or other reliable sources. 2. Prepare a U disk or CD with at least 8GB capacity for making installation media. 3. Make sure your computer meets the hardware requirements of UOS. Making installation media 1. Insert the USB disk or CD and open the production tool (such as Rufus, Etcher, etc.). 2. Select the downloaded Tongxin uos installation image file and follow the instructions
- LINUX 792 2024-02-12 14:54:04
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- Installing MySQL on Debian: Detailed Steps and Tutorials
- Installing MySQL in a Debian system is a relatively straightforward task, but due to the database configuration and security issues involved, it requires a certain amount of care and patience. This tutorial will provide you with detailed steps and precautions to help you complete it smoothly. MySQL installation. Installation steps: Update the system package list, open the terminal, and enter the following command: ```shellsudoapt-getupdate``` To install the MySQL server, enter the following command: sudoapt-getinstallmysql-server During the installation process, the system will prompt you to set the root user for MySQL. Password, make sure to choose a strong password and remember it. Configure MySQL and install it
- LINUX 851 2024-02-12 14:51:04
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- As an embedded development engineer, you have to know about the Linux kernel synchronization mechanism
- Preface Synchronization is the interaction between processes and between processes and system resources. Since the Linux kernel uses multitasking, there must be a synchronization mechanism between multiple processes to ensure coordination. There are many synchronization mechanisms in the Linux kernel. Today we will focus on the asynchronous and synchronous mechanisms in the kernel, focusing on the asynchronous mechanism in the kernel. The asynchronous mechanism in the kernel is divided into two types: one is the synchronization mechanism of the application layer, that is, the communication between application layer threads; the other is the synchronization mechanism of the kernel. When a thread enters kernel mode, it can communicate directly with the kernel. There are two threads in the kernel: one is thread A. After it enters the kernel state, it will communicate directly with the kernel and tell it what to do.
- LINUX 1325 2024-02-12 14:50:07
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- How to install the latest Linux kernel on CentOS 7
- The Linux kernel is the core of the operating system. It is responsible for managing hardware resources, providing system services, executing user programs, etc. The Linux kernel is frequently updated to fix vulnerabilities, add new features, and improve performance and compatibility. If you want to enjoy the latest Linux kernel on CentOS7, you need to install it manually because CentOS7 uses older stable versions by default. This article will teach you how to install the latest Linux kernel on CentOS7 and how to switch between different kernel versions. Step 1: Check the installed kernel version Let us install a distribution that contains a specific version of the kernel. In order to show the versions currently installed on the system, we can: #uname-srThe following image display
- LINUX 655 2024-02-12 14:45:12
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- CentOS installation optimization and CentOS 7 in-depth optimization guide
- When installing and optimizing CentOS, we need to consider many aspects, including system stability, security, performance and ease of use. This article will provide detailed steps and suggestions to help you fully optimize your CentOS system. Optimization during installation 1. Choose minimal installation: When installing CentOS, choosing minimal installation can reduce unnecessary software packages and services, thereby reducing system complexity and potential security risks. 2. Reasonable partitioning: Reasonable partitioning based on actual needs and the importance of data can improve the efficiency and security of data management. 3. Configure the network: During the installation process, configure the network connection so that the system can normally access the Internet or LAN after the system is installed. CentOS7 deep
- LINUX 990 2024-02-12 14:40:25
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