Linux | Red Hat Certified | IT Technology | Operations Engineer 👇 Join our technical exchange QQ group with the note 【Official Account】 for faster access 1 -> Introduction to HTTP Cookies 1.1 -> Definition HTTP Cookies (also known as web cookies, browser cookies, or simply cookies) are small pieces of data sent from a … Read more
Click the blue “One Linux” at the top left, and select “Set as Starred“ Get the latest articles at the first moment ☞【Resources】Learning Path for Embedded Driver Engineers ☞【Resources】Linux Embedded Knowledge Points – Mind Map – Free Access ☞【Jobs】A Comprehensive Project Based on Linux IoT that Can Be Included in Your Resume ☞【Jobs】Resume Template for … Read more
Four Ways for APP to Access Hardware References: Four Ways for APP to Access Hardware (64~67) Four Ways for APP to Access Hardware For example, how does a mother know if her baby has woken up while sleeping? How does a mother know if the child in the bedroom has woken up? 1. Occasionally going … Read more
Many newcomers and engineers learning embedded systems often feel confused halfway through their studies. They don’t know where to start, how to advance, or what level they are currently at in their learning journey. To address these common concerns, today, an embedded engineer with 8 years of experience will share insights on what skills you … Read more
1 Introduction to Linux Library Functions Linux provides a rich set of library functions that cover various domains, from file operations to network programming, graphical interfaces, mathematical operations, and more. Most of these library functions are standard C library functions, along with some that are specific to the Linux system. Linux library functions are typically … Read more
Click the blue text above to follow us. In Linux, a Read-Write Lock provides a synchronization mechanism that allows multiple threads to read shared resources concurrently, but only one thread can perform write operations on that resource. Compared to mutexes or spinlocks, read-write locks offer higher concurrency because they have three states: read-locked state, write-locked … Read more
1. What is a Character Device? First, we need to understand what a character device is. A character device is, simply put, a device that reads and writes data byte by byte, like keyboards, mice, and serial ports. Unlike block devices (like hard drives), character devices do not support random access; data must be read … Read more
This article introduces how to configure the Qt runtime environment on an embedded Linux development board and perform Qt program running tests. 1 Compiling tslib I have previously used tslib for testing the touchscreen, so I will record the compilation process here. Download the source code of the tslib library: https://github.com/libts/tslib/tags Copy the downloaded source … Read more
1. A new host was created, and a snapshot was taken for easy rollback. Passwordless login was set up in the same way, and then added to the hosts list. A copy test was conducted to prepare for the following playbooks. 2. The Ansible control machine installs nginx and downloads the Linux 7 ISO as … Read more
1. Basic Syntax ansible <target host or group> -m <module name> -a "<module parameters>" •<span><target host or group></span>: Can be a host, host group in Inventory, or <span>all</span> to indicate all hosts.•<span>-m <module name></span>: Specifies the module to use (e.g., <span>ping</span>, <span>shell</span>, <span>yum</span>, etc.).•<span>-a "<module parameters>"</span>: Parameters passed to the module. 2. Common Options Option … Read more