Year: 2025

Linux Shell | Master Core Commands for Cluster Monitoring and Troubleshooting in 5 Minutes

by
Linux Shell | Master Core Commands for Cluster Monitoring and Troubleshooting in 5 Minutes

In a Linux cluster environment, quickly identifying issues and monitoring system performance are core skills for operations personnel. This article compiles 17 high-frequency commands covering system monitoring, process management, resource analysis, and more to assist you in efficient operations. 1. Overall System Monitoring 1. top/htop Real-time view of CPU, memory, and process status, supporting dynamic … Read more

Linux | I.MX6ULL Peripheral Function Verification (Day 10)

by
Linux | I.MX6ULL Peripheral Function Verification (Day 10)

01 CSI Camera Test The I.MX6ULL Terminator development board exposes a CSI camera interface, supporting the OV5640 camera module from 【007】. First, we connect the OV5640 camera module to the development board, as shown in the figure below (when connecting, be sure to pay attention to the direction, the camera should face the inside of … Read more

A Must-Read for Linux Users: Easily Create an Efficient ZFS File System with File Compression

by
A Must-Read for Linux Users: Easily Create an Efficient ZFS File System with File Compression

Abstract: The ZFS file system has gained wider recognition on Linux. In ZFS, you can enable compression at the file system level. This will store data in a compressed format, saving a significant amount of disk space. In this article, we will explain how to create a file system from a ZFS storage pool and … Read more

Testing Methods for CAN Bus on Linux Development Boards: Demonstration with the Haptic Intelligence RK3568 Development Board

by
Testing Methods for CAN Bus on Linux Development Boards: Demonstration with the Haptic Intelligence RK3568 Development Board

This article introduces testing methods for the CAN bus on Linux development boards, demonstrated using theHaptic Intelligence EVB3568 Harmony Development Board, which is equipped with the Rockchip RK3568, a quad-core A55 processor with a frequency of 2.0GHz and 1T computing power NPU; it supports OpenHarmony 5.0 as well as Linux and Android operating systems, with … Read more

Basics of Linux Drivers | sys Filesystem

by
Basics of Linux Drivers | sys Filesystem

Click on the above“Linux Notes”, select“Pin/Star the Official Account” Welfare and valuable content delivered promptly Introduction Considerations Introduction to sys Filesystem What is the sys Filesystem Description of sys Filesystem Functions sysfs and Object Using sysfs Interface Examples of sysfs Read/Write Operations Common sysfs Interfaces Common sysfs Structures Code Experiment Conclusion Introduction The previous article … Read more

The Design Philosophy of ‘Everything is a File’ in Linux

by
The Design Philosophy of 'Everything is a File' in Linux

1. Core Concept of Unix/Linux File Abstraction “Everything is a file” is one of the core design philosophies of Unix/Linux systems, which essentially means: Unified Interface: Provides a consistent access interface through the file system Abstract Encapsulation: Abstracts resources such as devices and processes as files Simplified Operations: Uses a unified file operation API (open/read/write/ioctl/close) … Read more

Five Questions About Linux Network Firewalls (Part 4): The Efficient Framework and Data Structures of nftables

by
Five Questions About Linux Network Firewalls (Part 4): The Efficient Framework and Data Structures of nftables

Question 4: What other methods does nftables use, besides hash tables, to address the pain points and bottlenecks of iptables? nftables is a modern framework for network traffic filtering in the Linux kernel, designed to replace iptables and address its pain points in terms of performance and flexibility. In addition to using hash tables to … Read more

Collection of 50 Linux Software

by
Collection of 50 Linux Software

Audio Airtime – Airtime is an open-source broadcasting software for scheduling and remote site management. Ardour – Record, edit, and mix on Linux. Audacious – An open-source audio player that plays your music the way you want without consuming your computer’s resources for other tasks. Audacity – Free, open-source, cross-platform audio recording and editing software. … Read more

A Linux Intrusion Investigation

by
A Linux Intrusion Investigation

According to the received threat intelligence report, the hacker group IronShade has launched attacks against Linux servers in the region. To prevent attacks from this APT organization and understand their attack patterns, our team set up a honeypot, exposing weak SSH and ports. As security analysts, we need to conduct a comprehensive intrusion assessment on … Read more

100 Essential High-Frequency Linux Commands for Reference

by
100 Essential High-Frequency Linux Commands for Reference

The following is a complete reference manual for 100 high-frequency Linux commands, categorized with command names, function descriptions, common parameters, and typical use cases: 1. File and Directory Operations (15 commands) Command Function Description Parameter Examples Typical Use Case <span><span>ls</span></span> List directory contents <span><span>-l for detailed information </span></span><code><span><span>-a</span></span>Show hidden files <span><span>ls -la /etc</span></span> <span><span>cd</span></span> Change … Read more