Programmer Help

Deployment of keepalivedkeepalived is used in many highly available clusters. Generally, nginx, ipvs and haproxy are placed in the front end For example, when we use rabbitmq, we make such a cluster. If we make a cluster generally, we need such a highly available load balancer to distribute traffic. If we use haproxy, For example, if a rebbitm ...

Fat (FFmpeg automated testing environment) is an automated testing framework developed by FFmpeg community. It supports the testing of FFmpeg API and FFmpeg internal functions. The test of FFmpeg video filter belongs to the test of API. In order to add a fast test to a video filter, I have studied it fo ...

Rootkit is a kind of special malicious software. Its function is to hide the information of itself and specified files, processes and network links on the installation target. What is more common is that rootkit is generally used in combination with Trojans, backdoors and other malicious programs. In ou ...

PC operating system: Ubuntu 16.04 LTS Compiler: arm poky Linux gnueabi GCC 4.9.1 Based on the i.mx6 platform, the Linux driver module has been modified for some time, in which a lot of information is checked intermittently, and it feels that the knowledge is not so coherent, so it's time to start from t ...

1, Basic introduction 1 the old version of Qt provides two ways to access XML files: DOM and SAX. DOM mode: convert XML document into tree structure and store it in memory, and then read it, which consumes more memory. In addition, because documents have been stored in memory, it is more convenient ...

Experiment 1 - lighting an LED 1. Check the schematic diagram to determine how the hardware is connected The schematic diagram shows the hardware circuit of chip controlling LED and how the pin of chip connects with LED. 2. Check the main chip manual to determine how to control the pin Specific: ...

My virtual machine system is Ubuntu 18, to install redis 5.0.7 This article records the twists and turns of installing redis Problem description You have downloaded redis on the official website and unzip it wget http://download.redis.io/redis-5.0.7.tar.gz tar xvzf redis-5.0.7.tar.gz cd redis-5.0.7 su ...

FTP client upload and download module 1. Functions realized: a. Upload local file to FTP server b. Download files from ftp server to client c. Upload the folder (subfolder upload is not supported) to the tfp server, create a new directory and delete the directory 2. Compilation platform: Linux (none) 4. ...

Written in the front H3 has many development boards for reference, mainly including nanopi, orange PI, etc. most of these development boards support debian systems. For the purpose of learning, they want to run an openwrt. Openwrt18.06 has supported many boards of Quanzhi. Here we mainly refer to nanopi-m1-plus Configuration and principle of op ...

Basic frame design I. Introduction This experiment will use OpenGL GLUT to write a simple solar system operation system. Knowledge points involved in the experiment Fundamentals of C + + language Basic Makefile Basic OOP programming ideas Basic use of OpenGL GLUT structure Experimental rende ...