Click the blue text to follow us @七禾页话, the wild sika deer in Dalian has become a postcard presence Learning is endless, and recording is always with us! —— Liuli Kangkang As a network operation and maintenance engineer, ssh is one of the most commonly used Linux commands, especially now that cloud computing has become … Read more
Linus Torvalds, the “Father of Linux,” has once again expressed his frustration in a lengthy post on the Linux Kernel Mailing List (LKML), harshly criticizing the case-insensitive feature in file systems. He explicitly stated that this design is a “huge mistake” and that file system developers have never learned from past errors. The core issue … Read more
🌟 The ‘Non-configurable’ Aspects of Linux: Underlying Constraints and Design Choices 💡 Introduction: The Linux system is renowned for its high degree of customizability, with nearly all configurations achievable through modifying configuration files, recompiling the kernel, or writing scripts. However, within this open and free system, there still exist some ‘non-configurable’ or ‘hard-to-configure’ components. Today, … Read more
Environment Requirements Four Ways to Deploy Java Services on Linux (Including Environment Dependencies and Start/Stop Instructions) This article provides four methods for deploying Java services, compatible with JDK 21, detailing the environment dependencies, start, stop, and restart operations for each method. The JAR file provided in this example has been automatically placed in the /root/resume/ … Read more
🌟 Linux Philosophy: Everything is a File In Linux and Unix operating systems, “Everything is a File” is a core design principle. It means that almost everything in the system is abstracted as a file, including regular files, directories, hardware devices, process information, network interfaces, and more. 📂 1. What is “Everything is a File”? … Read more
Preparation Server: CentOS Linux release 7.9.2009 (Core) JDK: jdk-8u301-linux-x64.tar.gz JDK 8 download link:https://www.oracle.com/java/technologies/downloads/#java8 Installation Connect to the server using Xshell. Upload to the server, you can use the command # rz upload, -y to overwrite files rz -y If prompted that the command ‘rz’ is not found, install it manually # rz is a file … Read more
Original: https://mp.weixin.qq.com/s/HJihdfu9zVYEuvHVV0WXwQ 1. Introduction Conventional power management methods in Linux systems include shutdown (Power off), standby (Standby or Hibernate), and reboot (Reboot). These methods were used during the era of PCs or servers before the widespread adoption of embedded Linux. In that primitive era of computer science, driven by Moore’s Law, humanity was focused on … Read more
1. Overview of System Calls A system call is a set of interfaces provided by the operating system kernel to user-space programs, allowing user programs to request services from the kernel. It is a controlled communication mechanism between user space and kernel space. Why Do We Need System Calls? Permission Isolation: User programs run in … Read more
This issue records the latest news and shareable content about Zephyr, published in the last week of each month. This magazine is open source (GitHub: lgl88911/Zephyr_Fans_Monthly[1]), and contributions, issue submissions, or recommendations for Zephyr content are welcome. Project Data Excluding merges, 367 authors pushed 1,770 commits to the main branch and 1,884 commits to all … Read more
Thousands of sensors are performing a mysterious “electromagnetic ballet”—they are not ordinary components, but “industrial worker bees” equipped with ZigBee technology. This wireless protocol, inspired by the communication of bee colonies, is reconstructing the neural network of the industrial Internet of Things with low-power “swarm intelligence,” enabling cold machines to learn “wireless collaboration” and even … Read more