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 Uninstall MySQL server and client from Ubuntu   sudo service mysql stop sudo apt-get remove --purge mysql-server mysql-client mysql-common sudo apt-get autoremove sudo apt-get autoclean sudo rm -rf /var/lib/mysql/ sudo rm -rf /etc/mysql/ RE-INSTALL  sudo apt-get install mysql-server mysql-client If in case you got this error in trying to login:  sudo systemctl stop mysql.service sudo mkdir -p /var/run/mysqld sudo chown mysql:mysql /var/run/mysqld sudo mysqld_safe --skip-grant-tables --skip-networking & sudo mysql -u root  CHANGE THE ROOT PASSWORD: FLUSH PRIVILEGES; ALTER USER 'root'@'localhost' IDENTIFIED BY 'password'; exit; sudo pkill mysqld_safe mysql -u root -p "provide your password and login"            

 My Linux Software i use   Normal use Software: sudo snap install vlc sudo snap install code --classic sudo apt install git    

 How to Upload file in React and convert to json and upload to local MongoDB App.js // App.js import React, { useState } from 'react'; function App() {   const [message, setMessage] = useState('');   const [file, setFile] = useState(null);   const handleFileChange = (event) => {     setFile(event.target.files[0]);   };   const handleUpload = () => {   if (!file) {     console.error('No file selected.');     return;   }   const formData = new FormData();   formData.append('file', file);   formData.append('filename', file.name); // Append filename to FormData   fetch('http://localhost:5000/upload', {     method: 'POST',     body: formData,   })     .then(response => response.text())     .then(data => {       setMessage(data);       setFile(null); // Reset file ...

 How to Write a Hello Node App with ReactJS                             1. Create a ReactJS App. npx create-react-app hello-app cd hello-app npm start 2. Create a Backend NodeJS file structure.     Inside your `hello-react` project create a folder backend/server.js   server.js const express = require('express'); const cors = require('cors'); const app = express(); app.use(cors()); app.get('/hello', (req, res) => {   res.setHeader('Content-Type', 'text/plain');   res.send('Hello, world!\n'); }); const PORT = process.env.PORT || 5000; app.listen(PORT, () => console.log(`Server running on port ${PORT}`));     App.js import React, { useState } from 'react'; function App() {   const [message, setMessage] = useState('');   const handleClick = () => {     var url = 'http://localhost:5000...

 Java Releases - Summary   Here's a summary of the Java version releases with their respective Class File Format Version, Release dates, and End of Support dates: JDK 1.0 (Java 1.0): Class File Format Version: 45 Release Date: 23rd January 1996 End of Public Updates: May 1996 JDK 1.1 (Java 1.1): Class File Format Version: 45 Release Date: 18th February 1997 End of Public Updates: October 2002 J2SE 1.2: Class File Format Version: 46 Release Date: 4th December 1998 End of Public Updates: November 2003 J2SE 1.3: Class File Format Version: 47 Release Date: 8th May 2000 End of Public Updates: March 2006 J2SE 1.4: Class File Format Version: 48 Release Date: 13th February 2002 End of Public Updates: October 2008 J2SE 5.0 (Java 5): Class File Format Version: 49 Release Date: 30th September 2004 End of Public Updates: October 2009 Java SE 6: Class File Format Version: 50 Release Date: 11th December 2006 End of Public Updates: April 2013 Java SE 7: Class File Format Version: 51...