In the field of audio and video processing technology, FFmpeg is a powerful and widely used open-source multimedia framework. It supports various encoding and decoding formats, providing developers with a rich set of tools and interfaces to handle audio and video data. Today, we will delve into the encoding and decoding technologies in FFmpeg, particularly … Read more
Transform your phone into a Linux powerhouse with Termux, the AI code assistant Potpie is gaining popularity, along with the new open-source documentation force Docmost. Come unlock new tech play! 1. Termux: Android Transforms into a Linux Powerhouse 🏷️ Repository Name: termux/termux-app🌟 Stars at Publication: 40689 (New in the last week: 230)🇨🇳 Repository Language: Java🤝 … Read more
There is a saying in the community: “Cherish life, stay away from barriers,” which sufficiently illustrates that memory barriers are quite obscure and difficult to grasp accurately. Using too weak a barrier can lead to software instability, while using too strong a barrier can cause performance issues. Therefore, in engineering, the goal is to pursue … Read more
Understanding the Relationship Between Linux Sockets, Cores, Threads, and CPUs **CPU(s)**: Represents the total number of logical CPUs in the system. It is calculated by multiplying the number of physical CPU cores, the number of threads per core, and the number of physical CPUs in the system. For example, a system with 2 physical CPUs … Read more
1. Overview of AWK Basics # Basic Structure awk 'BEGIN{preprocessing} {line processing} END{postprocessing}' filename # Common Variables NR: line number | NF: number of fields | $0: entire line content | $1: first column 2. High-Frequency Practical Scenarios 1. Data Deduplication Example: Retaining Unique Lines # Deduplicate entire lines (keep the first occurrence) awk '!seen[$0]++' … Read more
01 The Yocto file system supports QT by default. So how do we run our QT programs on the Yocto file system? In this chapter, we will learn how to develop QT programs in a Yocto file system + Ubuntu environment. Note that the development environment is based on “qtcreator-3.5.1” (Ubuntu 16.04.6), and the library … Read more
Hello everyone, I am Bug Jun~ In most people’s impression, writing a technical book is just about organizing what you know. However, when the subject is the Linux kernel, it becomes like performing ballet on a tightrope — one of the most complex open-source software in the world, a giant system composed of 28 million … Read more
Table of Contents Apache Log Statistics Nginx Log Statistics Web Service Status Statistics Other Statistical Combinations Count Statistics This article collects some common statistics commands for Apache/Nginx server logs in Linux operations. Apache Log Statistics # List the top IPs with the most visits today [[email protected] httpd]# cut -d- -f 1 access_log | uniq -c … Read more
Introduction Mastering system monitoring commands is a fundamental skill for Linux operation and maintenance. This note aims to organize and summarize commonly used monitoring commands along with their core functions and practical scenarios, facilitating quick review and learning to enhance system management and troubleshooting efficiency. 1. Comprehensive Performance Monitoring (CPU, Memory, Load) 1.<span>top</span> •Core Function: … Read more
When a company experiences a hacker intrusion; when the system crashes; when a security incident affects normal business operations, can you respond immediately and provide a solution? The following article will teach you the Linux emergency response process! Intrusion Investigation Approach 01 Apache Log Path Access Log: /var/log/apache2/access.log (Debian/Ubuntu) or /var/log/httpd/access_log (CentOS/RHEL) Nginx Log Path … Read more