System Commands

Summary of Linux Host Hardware Information Collection Commands

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In the operation and maintenance process of OpenStack, Kubernetes, physical machines, or virtualization platforms, the ability to quickly collect host hardware information is of great significance for problem diagnosis. Mastering the knowledge in this article indicates that you are an experienced engineer. 🧠 1. Basic Information Identification Function Command View Product Model <span><span>cat /sys/class/dmi/id/product_name</span></span> View … Read more

Understanding the Linux System Directory Structure

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🐧 Understanding the Linux System Directory Structure “The root directory of the Linux system is like the root of a large tree, from which all files and folders grow.” 🌲 1. Starting with <span><span>ls /</span></span> command After logging into the Linux system, enter the command: ls / 你会看到一串看似复杂的目录，如同一棵树的分枝。这就是 Linux 的 根目录结构。 📂 2. Detailed Explanation … Read more

Essential Linux Server Resource Monitoring Commands: Quickly Identify Performance Bottlenecks!

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1. Command Overview 🔍 1. top command: Real-time system monitoring 🌟 2. htop command: Enhanced system monitoring 💾 3. free command: Memory usage 💽 4. df command: Disk space check 📁 5. du command: Directory size analysis ⚡ 6. iostat command: I/O performance monitoring 📊 7. vmstat command: Virtual memory statistics 🌐 8. netstat command: … Read more

The Black Hole in Linux (/dev/null) and Its Applications

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The Black Hole in Linux (/dev/null) and Its Applications

The black hole in Linux refers to /dev/null—a file that only accepts input but never outputs anything. Anything you throw into it disappears forever, commonly used for “silencing” or “placeholder” purposes. 1. Why is it called a black hole? Reading from it: Immediately returns EOF (end of file). Writing to it: The system directly discards … Read more

Comprehensive Guide to Linux System Information Commands

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Comprehensive Guide to Linux System Information Commands

Those who follow me are the kindest! Only speaking for the people, using the pen to clarify the situation and measure the warmth of the world. Did you know? If you want to explore the secrets of Linux systems, here is a treasure trove of practical commands! From basic system information to hardware, disk, processes, … Read more

IT Knowledge Base | Issue 3: ‘Commands to Disable the Linux Firewall’

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IT Knowledge Base | Issue 3: 'Commands to Disable the Linux Firewall'

Through action, knowledge deepens; through deep knowledge, action becomes more effective. To stimulate students’ interest and enthusiasm for studying information technology, and to help everyone understand more practical computer knowledge, the School of Information Technology has specially launched the “IT Knowledge Base” column. Continuous effort, like water dripping through stone, conveys the pulse of information, … Read more

Essential Linux Memory Monitoring Commands Explained

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Essential Linux Memory Monitoring Commands Explained

Click the blue “Most Programmer” to follow me! Add a “star“, every day at 18:03 to learn technology together The commands include: 1. The free command, which displays the system memory status, including physical memory, swap memory, shared memory, and system cache usage; 2. The cat /proc/meminfo command, which reads the contents of the /proc/meminfo … Read more

Eight Commonly Used Linux Performance Monitoring Commands: How Many Have You Used?

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Eight Commonly Used Linux Performance Monitoring Commands: How Many Have You Used?

Image source: Internet In Linux systems, there are many performance monitoring tools. Below, I will introduce several commonly used command-line tools. 1. top/htop top: Function: Real-time monitoring of processes, displaying information about CPU, memory, load, swap space, etc. Common Shortcuts: Shortcut Description M Sort by memory usage P Sort by CPU usage k Kill a … Read more

In-Depth Analysis of Linux Core Directory Structure and Function Mapping

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In-Depth Analysis of Linux Core Directory Structure and Function Mapping

System Command Hub: /bin • Core Positioning: Stores the core executable instruction set of the system (abbreviated as Binaries), covering the basic command toolchain used frequently. • Analog Reference: Similar to the C:\Windows\System32 instruction set storage area in Windows environments. Boot Loader Hub: /boot • Core Components: Contains Linux kernel images, hardware driver modules, and … Read more

Common Linux Inspection Commands

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Common Linux Inspection Commands

In Linux systems, various commands are used for system inspections to check system status, performance, configuration, and security. Here are some commonly used Linux inspection commands and their descriptions: 1. System Information ● uname -a：Displays all system information, including kernel version, hostname, etc. ● hostname：Displays or sets the system’s hostname. 2. System Load and Performance … Read more