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deploy Download installation packageUpload and unzip the installation packageConfigure environment variablesModify profileFormat HDFSModify script fileStart and verifyStop cluster be careful: 1. The JDK environment is installed and configured by default 2. The CentOS7 Linux environment is installed and configured by default 3. Change the curre ...

catalogue 1. Document processing command 1.1 # directory processing 1.2 document processing 1.3 link handling 2. Permission management command 2.1 change authority 2.2 # change of ownership 3. File search command 4. Help command 5. User management commands 6. Compression and decompression command 7. Network command 8. Shutdown and ...

IO: refers to the flow of data transfer between devices Classification by flow direction: Input stream Output stream Classification by data type: Byte stream A: byte input stream InputStream             FileInputStream: FileInputStream fis = new FileInputStream("file name of read data"); Byte buffered input stream: BufferedInputStream ...

Technical work should be rewarded follow+Click three times (like, comment, collect) and watch again to form a good habit RocketMQ tutorial related series directory catalogue Section I: server preparation Section 2: installing RocketMQ Create rocketmq storage directory Modify runbroker sh Modify runserver sh Section III: Configuration ...

1, Introduction This topic is a leaf recognition system based on MATLAB HU moment invariants. By calculating the geometric characteristics of various leaves, we can judge what type of leaves they belong to. Geometric moment was proposed by Hu(Visual pattern recognition by moment invariants) in 1962. It has translation, rotation and scale invar ...

Title Source: https://blog.csdn.net/weixin_40689871/article/details/108186903 http://wiki.ros.org/ROS/Tutorials 1. 2. 3. Dark blue course assignment corresponding to the first link 4. Input two parameters from the command line and design an adder in the way of server and client. It was intended to use ide KDevelop for debug ging, but a bad ...

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Python - implement file downloader Supplementary knowledge points tcp servers generally need to be bound, otherwise the client cannot find the servertcp clients are generally not bound, because they send out the linked server, so as long as the ip, port and other information of the server is determined, the local client can be randomly connec ...

1, Using the String class The String object calls the public String replaceAll(String regex,String replacement) method to return a new String object. The character sequence of the returned String object is the character sequence obtained by replacing all sub character sequences matching the parameter regex in the character sequence of the curr ...

Use the MyBatis framework to manipulate data and integrate MyBatis in the SpringBoot framework Use steps: 1.mybatis start dependency: complete the automatic configuration of mybatis objects, and put the objects in the container 2.pom.xml specifies that the xml files in the src/main/java directory are included in the classpath 3. Create ...