Programmer Group

         In the development stage of an embedded product, the bootloader needs to be continuously downloaded to the memory. If the memory uses nand flash, but there is nothing in it for the first time, it can only be started in other ways according to the startup mode of the processor, such as SD card or ...

1, YUM overview 1.1 introduction to yum warehouse yum is a software update mechanism based on RPM package (short for red hat package manager), which can automatically solve the dependencies between packages. It solves a lot of time for finding and installing dependent packages in daily work Why does dependency occur? Because linux itself ...

Real time operating system and non real time operating system In the field of industrial control, we often hear about real-time systems and non real-time systems. Linux and Windows are typical non real-time systems. Typical real-time operating systems include VxWorks, RT thread, uCOS, QNX, WinCE, etc. Relationship between "real-time ...

1, Introduction to opencv OpenCV is a cross platform computer vision and machine learning software library based on BSD license (open source), which can run on Linux, Windows, Android and Mac OS operating systems. It is lightweight and efficient - it is composed of a series of C functions and a small number of C + + classes. It also provid ...

GCC package includes GNU compiler set, including C and C + + compilers. Install GCC First, go to the source directory and unzip the package: cd /sources tar xf gcc-4.9.2.tar.bz2 cd gcc-4.9.2 For GCC documents, it is recommended to compile GCC in a special compilation directory outside the source code directory: mkdir -v ../gcc-build cd .. ...

1. Cluster distribution file Application scenario We often need to copy the newly created and modified files to the same directory of all nodes. It is not so friendly to execute the scp command once. Basic knowledge (a) rsync command original copy: [root@bigdata801 hadoop-3.3.1]# rsync -av /opt/module/hadoop-3.3.1/ bigdata802:/opt/module/h ...

catalogue 1. Introduction to lamp architecture 1.1 general 1.2 construction sequence 1.3 main functions of each component 1.4 advantages of source code compilation and installation 2. Architecture construction process 2.1 preparation before installation 2.2 installing apache 2.3 installing mysql 2.4 installing PHP 1. Introduction ...

The web backend on the server often needs to run multiple processes at the same time, and each process needs to exchange data. This function can be realized in python with the help of multiprocessing. Further, after the process is interrupted, we want developers to receive messages for improvement and maintenance at the first time, which ne ...

1, Foreword First, declare that the configuration process can allow you to configure your RabbitMQ. Secondly, I'm pure white. If you have any questions in the article, please point them out in the comment area. Thank you very much. 2, Configure ErLang If ErLang is not well equipped, you can't engage in RabbitMQ. Even if you install the corr ...

        H5ai is a modern file indexer for HTTP Web servers, focusing on your files. Catalogs are displayed in an attractive way, and browsing them can be enhanced by different views, breadcrumbs, and tree overviews. Originally h5ai was an acronym for HTML5 Apache index, but now it also supports other Web servers.   &nb ...