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- Make Linux server a good helper for Go developers
- Installing a Linux system is still a relatively complicated matter for many people, let alone using a Linux system to develop Go. But now, with the convenience provided by major cloud server manufacturers, you can easily own a Linux server and just log in using a remote terminal. For those newbies who are not familiar with Linux systems and Go development, here are some simple settings and steps to help you use Linux systems to develop Go programs more smoothly. I still remember when I was in college, installing a Linux system was still a relatively complicated matter. You need to download the image first, then burn it to a CD, and then install it with the CD. The biggest headache is that the quality of the optical drive in my laptop is not very good, so is there something wrong?
- LINUX 1172 2024-02-13 19:51:11
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- Detailed explanation of Linux inotify function and implementation principle
- 1. Main functions of inotify Compared with MAC or Windows, the Linux desktop system still needs improvement in some aspects. In order to improve this situation, the open source community has proposed some mechanisms to allow user mode to learn about changes in the kernel or underlying hardware devices in a timely manner, so as to better manage devices and provide better services. Among them, hotplug is a mechanism for the kernel to notify user-mode applications of events about hot-plug devices, which can help desktop systems effectively manage devices. udev dynamically maintains device files under /dev, while inotify is a file system change notification mechanism that can promptly notify user-mode file system changes, such as file additions, deletions and other events. This mechanism was originally known as
- LINUX 1103 2024-02-13 19:45:30
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- 15 practice examples of the Linux 'cd' command
- In the Linux operating system, the "cd" (change directory) command is one of the most commonly used and important commands for novices and system administrators. For administrators who manage servers without a graphical interface, it is essential to use the "cd" command to enter directories, check logs, execute programs/applications/scripts, and complete other tasks. For novices, the "cd" command is also one of the basic commands they must learn. So, please study hard. We will bring you 15 basic 'cd' commands here. They are full of skills and shortcuts. Learning to use these learned skills will greatly reduce the effort and time you spend on the terminal. Course content Command name: cd stands for: switch directory Platform: all Linux distributions Execution method: command
- LINUX 485 2024-02-13 19:42:03
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- volck: A utility tool for locking down Linux users' virtual consoles
- In the Linux system, there is a special terminal called a virtual console, which is a text mode interface displayed directly on the screen, allowing users to operate the system without a graphical interface. There are usually multiple virtual consoles, which can be switched by Ctrl+Alt+F1~F6. The advantages of the virtual console are that it is simple, fast, and convenient, but it also has the disadvantage that there is no security protection and anyone can enter commands or view information on it. Is there a way to lock the virtual console so that it can only be unlocked by the user who enters the password? The answer is volck. Volck is a utility tool for locking the virtual console of Linux users. It allows you to protect your virtual console from being accessed by others when you leave the computer.
- LINUX 896 2024-02-13 19:40:15
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- LinuxLive installation CentOS and Linux installation Geany tutorial
- In the process of using the Linux operating system, we often need to install different software and tools to meet our needs. This tutorial will introduce you how to use LinuxLive to install CentOS, and explain in detail how to install the Geany text editor on Linux. LinuxLive is a tool used to install a Linux system to a USB flash drive or other removable storage device. Using LinuxLive, you can easily install CentOS on your computer. The following are the detailed steps: 1. Download the LinuxLive tool: You need to download LinuxLive Tools, you can find the latest version of LinuxLive on the official website and download it according to your operating system
- LINUX 980 2024-02-13 19:39:21
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- Understanding Linux file permissions, plain and simple
- Linux is a multi-user and multi-tasking operating system. It has strict permission control on access and operations of files and directories. If you want to manage your files efficiently on Linux, you need to understand the concept and usage of Linux file permissions. User Group Other Read=4XXX Write=2X Execution=1XXX Total (4+2+1)=7(4+1)=5(4+1)=5 For example, 4+2+1=7, grant read, write , execute permission; 4+1=5, only read and execute permissions are granted. So 755 grants 7 (read, write, execute) to the file owner, 5 (read and execute) to the group the file belongs to, and 5 (read and execute) to the world. Each number corresponds to a set of permissions (read, write, or execute).
- LINUX 623 2024-02-13 19:39:03
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- too strong! This command line tool can quickly and automatically jump to the Linux file directory
- In the Linux terminal, sometimes it can be troublesome to jump to a directory. You need to enter a long command path to enter the specified directory. autojump is a command line tool that can quickly and automatically jump to a file directory. It saves records of the most used directories from the command line to the database, so before using it, you must first access the directory and then jump to the desired directory. It will add different weights according to the frequency of accessing the directory. The more frequently the directory is accessed, the higher the weight, the higher the ranking, and the simpler the jump command. autojump can be installed on Linux, OSX, Windows and BSD platforms, supporting source code, Debian and derivatives, ArchLinux/Gentoo/
- LINUX 751 2024-02-13 19:33:03
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- How to solve concurrency control issues in Linux device drivers?
- In Linux device drivers, when multiple execution units access the same resource at the same time, a "race condition" may occur, leading to data inconsistency or system crash. Therefore, we must perform concurrency control on shared resources to ensure mutually exclusive access. This article will introduce common methods to solve concurrency control in the Linux kernel, including interrupt masking, atomic operations, spin locks, semaphores, mutexes, etc., and give corresponding sample codes. One problem that must be solved in Linux device drivers is the concurrent access of shared resources by multiple processes. Concurrent access can lead to race conditions. Interrupt masking, atomic operations, spin locks, and semaphores are all mechanisms to solve concurrency problems. Interrupt masking is rarely used alone. Atomic operations can only be performed on integers, so spin locks and semaphores
- LINUX 1134 2024-02-13 19:24:17
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- CentOS Hibernation and Hibernation Command Installation and Usage Guide
- Table of Contents Introduction to this article: Installing the CentOS hibernation command Installing the hibernation command Precautions for using the hibernation command CentOS hibernation Sharing with you Installing the CentOS hibernation command In the CentOS operating system, hibernation (Suspend) is a power-saving mode that can temporarily shut down the computer. But retaining the current session and running applications, hibernation mode can help you save power and quickly return to your previous working state. This article will introduce how to install the CentOS hibernation command and how to use it. Install the hibernation command 1. Open a terminal and log in as the root user. 2. Run the following command to update the system package list: sudoyumupdate 3. Install the pm-utils package, which
- LINUX 1092 2024-02-13 19:20:36
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- Seize Linux Gold in 60 Seconds
- If your Linux server suddenly experiences a load surge and alarm text messages keep flooding into your mobile phone, how can you find the root cause of Linux performance problems in the shortest possible time? You may wish to refer to this blog post from the Netflix Performance Engineering Team to learn how they can quickly diagnose machine performance issues in one minute through ten commands. Overview By executing the following command, you can have a general understanding of system resource usage within 1 minute. uptimedmesg|tailvmstat1mpstat-PALL1pidstat1iostat-xz1free-msar-nDEV1sar-nTCP,ETCP1top Some of the commands require syss to be installed
- LINUX 990 2024-02-13 19:20:03
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- CentOS installs Samtools and CentOS installs ntfs-3g
- Preface Under the LINUX operating system, we often need to install various software and tools to meet different needs. Samtools and ntfs-3g are two tools that are often used under the CentOS system. Samtools is a tool used to process and analyze high-speed files. A tool set for throughput sequencing data, and ntfs-3g is an open source driver that can read and write NTFS file systems under Linux. We will introduce in detail how to install these two tools under CentOS systems. Install Samtools1. Open the terminal and use the following command to download and install the dependency package of Samtools: ```shellsudoyuminstallzlib-develbzi
- LINUX 409 2024-02-13 19:00:20
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- Six ways to get involved on Linux: How to contribute to the operating system you love
- Although Linux is a great operating system, it can have some inconveniences when compared to Windows or macOS. Since Linux distributions are community-supported projects, your contributions are needed if you want them to get better. Here are some ways you can improve your Linux ecosystem. 1. Use Linux This may be obvious, but one of the best ways to improve Linux is to actually use it. You will experience firsthand its capabilities and areas for improvement. This means you'll know which bugs need fixing and which user interface elements need more fine-tuning. Related: Five Things Don’t Forget to Do When Installing Ubuntu https://www.linuxmi.
- LINUX 545 2024-02-13 18:50:12
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- Analysis and application of Linux kernel 2.1 single kernel and microkernel application system
- Contents 1. Two forms of application systems 1.1 Operating system-free application system For simple SOC applications, such as most simple-function microcontroller applications, there is no need to use an operating system in the system. At this time, the application directly calls the corresponding driver operation. The underlying hardware is as shown in the figure: With these structures, the application software directly calls the device driver to operate the hardware. The advantages are: simple, direct and efficient. Suitable for small and simple systems. For complex systems, application systems that need to share hardware resources in different functions, this method is obviously not suitable. 1.2. Application system with operating system. For complex application systems, application scenarios where hardware and other resources need to be shared between functional modules, an operating system needs to be added to the application system. For this purpose, the application system is as shown on the right: such as
- LINUX 590 2024-02-13 18:45:27
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- Linux command history - easily improve command line efficiency
- For Linux enthusiasts and developers, the command line is an extremely important tool. However, in the process of frequent use of the command line, we will inevitably make input errors or forget the commands we have used before. At this point, Linux command history can come in handy. It allows us to easily find and reuse previous commands, greatly improving our work efficiency. Now, let’s explore this powerful tool together! The underlying HISTSIZE variable value of history sets the number of commands saved in the history list. By default, this value is 500. These previously issued commands (called the history list) are stored in a history file. Its default location is ~/.bash_histo
- LINUX 1283 2024-02-13 18:45:02
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- Introduction to accurately detecting Linux kernel vulnerabilities
- The usual mode of quoting open source software is to introduce the dynamic library or jar package of open source software. Therefore, the false alarm rate of vulnerabilities will be very low during vulnerability detection, but it is different in the Linux kernel. Since the Linux kernel function modules are very rich and It is huge and will be tailored according to business needs in actual use. Therefore, how to achieve accurate vulnerability detection and reduce the false positive rate of vulnerability detection in this scenario is particularly prominent. Linux kernel structure: The Linux kernel is composed of seven parts, and each different part is composed of multiple kernel modules. The structural block diagram is as follows: Linux tailoring scenario analysis: By analyzing the Linux kernel source code, you can see that different modules are stored in different directories. The implementation code can be conf at compile time.
- LINUX 837 2024-02-13 18:27:27
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