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Articles by Satish Kumar
Page 78 of 94
PDF generation from XHTML in a LAMP environment
The LAMP environment is widely used for web development, and it is an acronym for Linux, Apache, MySQL, and PHP. This environment is an open-source platform that is easy to use and deploy. PDF format is commonly used for sharing and exchanging documents over internet. However, generating PDF documents can be a challenging task in a LAMP environment, especially when converting XHTML documents. In this article, we will explore different methods used for PDF generation from XHTML in a LAMP environment. What is XHTML? XHTML stands for Extensible Hypertext Markup Language, which is a markup language that is ...
Read MorePHP and Xvfb usage
Xvfb (X Virtual Frame Buffer) creates a virtual display in memory without requiring physical display hardware. This allows running graphical applications in a headless environment. When combined with PHP, Xvfb enables server−side execution of GUI applications through PHP scripts. Why Use Xvfb with PHP? PHP typically handles server−side logic without direct graphics support. However, certain scenarios require running graphical applications on servers − Automated testing of GUI applications Browser automation for web scraping Image/video processing with graphical tools Running desktop applications headlessly Installation Ubuntu/Debian: sudo apt-get update sudo apt-get install xvfb ...
Read MoreHow to Install & Setup MEAN Stack on Ubuntu (MongoDB, Express.JS, Angular.JS, Node.JS)
The MEAN stack is a popular web development framework consisting of MongoDB, Express.js, Angular.js, and Node.js. It is an open-source platform that allows developers to create robust web applications quickly and efficiently. In this article, we will guide you through the installation and setup process of the MEAN stack on Ubuntu. Step 1: Install Node.js and NPM Node.js is the runtime environment that allows developers to run JavaScript code outside of the browser. It is the backbone of the MEAN stack. To install Node.js on Ubuntu, follow these steps − Open the terminal on Ubuntu by pressing ...
Read MoreHow to restart a NoSQL Database service like MongoDB?
To restart a MongoDB service, use the systemctl command on modern Linux systems. MongoDB runs as a system service called mongod that can be managed through systemd service management tools. Syntax sudo systemctl restart mongod sudo systemctl status mongod sudo systemctl enable mongod Method 1: Using systemctl (Recommended) Check the current status of MongoDB service ? sudo systemctl status mongod mongod.service - MongoDB Database Server Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled) Active: inactive (dead) Docs: https://docs.mongodb.org/manual Restart ...
Read MoreHow To Configure PostgreSQL 12 Streaming Replication in CentOS 8?
PostgreSQL Streaming Replication continuously streams Write-Ahead Log (WAL) data from a primary (master) node to standby (slave) nodes, creating near-real-time database copies for high availability and fault tolerance. Master Read/Write WAL Slave 1 Slave 2 Read-only Read-only Master Node Configuration 1. Enable WAL Archiving Edit ...
Read MoreHow to Download and Install PostgreSQL on Windows?
PostgreSQL is a powerful, open-source relational database system used for enterprise applications. This guide covers downloading, installing, configuring, and testing PostgreSQL on Windows. Downloading PostgreSQL Go to postgresql.org/download/windows Click Download the installer (EnterpriseDB graphical installer) Select the latest version for your OS (64-bit recommended) Download will begin automatically Installing PostgreSQL Run the downloaded installer and follow these steps − Step 1: Welcome screen → Click Next Step 2: Select components (keep all selected: PostgreSQL Server, pgAdmin, Command Line Tools, Stack Builder) Step 3: Choose installation directory (default recommended) Step 4: Choose data ...
Read MoreHow to Deploy PostgreSQL on Kubernetes?
PostgreSQL is an open-source RDBMS known for handling complex datasets. Kubernetes automates deployment, scaling, and management of containerized applications. Deploying PostgreSQL on Kubernetes provides automated scaling, rolling updates, and improved reliability through replicas and failover. Deployment Steps Cluster Image Manifest Deploy ...
Read More10 Advance MySQL Database Interview Questions and Answers
Introduction MySQL is one of the most widely used open-source relational database management systems (RDBMS) in world. It is used by some of the largest companies in the world, including Google, Facebook, and Twitter. If you are preparing for an interview for a MySQL developer position, you need to be well-prepared with advance MySQL database interview questions and answers. In this article, we will cover some of the most common and advanced MySQL database interview questions and provide you with the best possible answers. What is MySQL? MySQL is an open-source relational database management system. It is widely used by ...
Read More10 Basic MySQL Interview Questions for Database Administrators
As a database administrator, you need to be well-versed in MySQL, one of the most popular open-source database management systems. Whether you are a beginner or an experienced professional, there are some basic MySQL interview questions that you should be prepared to answer. In this article, we'll cover some of the most common questions and provide examples to help you prepare for your next interview. What is MySQL? MySQL is an open-source relational database management system (RDBMS) that uses SQL (Structured Query Language) to manage and manipulate data. It was first released in 1995 and is currently owned by Oracle ...
Read More10 Best Android Development Courses in 2023
Are you interested in Android development and want to learn how to create amazing mobile apps? Then, you’ve come to the right place. In this article, we’ll be exploring some of the best Android development courses available in 2023. Android is the most popular mobile operating system, with over 2 billion active users worldwide. Therefore, it's no surprise that the demand for skilled Android developers is on the rise. Learning Android development can lead to a rewarding and lucrative career, as well as giving you the opportunity to create innovative mobile apps that can change the world. So, without further ...
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