Detailed Explanation of File Read and Write Operations in C: fread, fwrite, fprintf In C language, file read and write operations are important means for programs to interact with external data. Through files, we can save data to disk and read data from disk. This article will detail the three main file operation functions in … Read more
Comprehensive Guide to C Language Unions: Differences Between Unions and Structures In the C language, a union and a structure are two important data types used to store different types of data. This article will detail their basic concepts, usage, and explain the differences between them. 1. Structure (Struct) 1. What is a Structure? A … Read more
Thread Local Storage in C Language Concurrency: pthread_key_create In multithreaded programming, managing data sharing between threads is an important issue. Especially in C language, due to its direct memory manipulation characteristics, using data appropriately can become complex. In this article, we will delve into “Thread Local Storage” and how to implement this feature using the … Read more
Hello everyone, I am Xiaokang. Today, let’s talk about a lighter topic: implicit type conversion in C. Have you ever experienced this: the code looks fine, the compilation goes smoothly, but it runs into inexplicable errors? After some debugging, you find out it was a “small data type” issue? Congratulations, you are now part of … Read more
01 1. Introduction to CD Resources Join me to become an embedded Linux expert, let’s get started! 02 Next, we will learn together. 01_ Development and Flashing Tools （Linux image flashing tools, cross-compilers, bare-metal image creation tools） 1. Cross-compiler （ARM cross-compiler） 2. Bare-metal image creation tools （Bare-metal image creation tools） 3. mfgtools_for_6ULL （Image flashing tools） … Read more
In the field of Linux virtualization, KVM and QEMU are the two most common tools. Many people have heard of them, but often confuse their differences, with some even mistakenly believing they are the same thing. Today, we will unveil their mysteries and explore the characteristics, roles, and how KVM and QEMU work together! 1. … Read more
LinuxMirrors provides a very convenient source change script. You only need to run a single command to help users quickly change the software source of the Linux system and install Docker. It supports various mainstream Linux distributions, including Debian, Ubuntu, CentOS, Fedora, etc., and can automatically detect the system type and version, providing the most … Read more
Common commands for the nano editor, where ^ represents Ctrl and M represents Alt. When shutting down Linux, use the who command to check online status, netstat -a to check network connections, and ps -aux to view background processes. Before shutting down, use the sync command to write data to disk. Use the shutdown command … Read more
Mastering Linux Redirection Techniques: The Secret to Doubling Command Line Efficiency Linux Command Line In my 15 years of development career, one tool has always been by my side: the Linux terminal. Among the terminal operations, the technique that has benefited me the most is redirection. This seemingly simple concept actually contains powerful capabilities; mastering … Read more
ip rule manages the rules of the routing policy database in the Linux kernel. Through these rules, complex routing decisions can be made, such as routing based on source address, destination address, protocol type, and other conditions. Command Format ip [ OPTIONS ] rule { COMMAND | help } ip rule [ show [ SELECTOR … Read more