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JavaScript provides two methods to work with JSON content. parse and stringify. The methods are JSON.parse() and JSON.stringify(). JSON.parse() method takes JSON string and transforms it into a JavaScript object. JSON.stringify() method takes a JavaScript object and transforms it into a JSON string. 1. Using JSON.parse() The JSON.parse() function takes input a JSON data and transforms it into a JavaScript object. Here is a simple example of converting a JSON string into a JS object....

This tutorial will provide you with a quick and easy way to setup DKIM (DomainKeys) with the Postfix Mail server running on Ubuntu and Debian-based systems. Prerequisites Before we install and configure OpenDKIM for Postfix, we need to make sure that we have the necessary prerequisites in place. First and foremost, you will need a working Ubuntu system with root access. You will also need to have Postfix installed and configured....

Linux operating systems have different versions to cover all types of users according to their requirements and work. These versions are known as distributions. These are open source distributions meaning they are accessible without any cost. 10 Best Linux Server Distributions 5 Most Stable Linux Distributions 5 Best Linux Distributions that Looks Like MacOS 5 Best Linux Distributions To Replace Windows This article will discuss the top 10 popular Linux distributions among 600 plus different distributions based on their purpose, pros and cons, features, and system and user requirements....

Your website is the first impression your potential customers will have of your business. Whether it’s a personal blog or an eCommerce store, you want your site to look great and load quickly. If you find yourself often frustrated by slow page loads and lagging performance, it’s time to consider speeding up your WordPress site. A fast website not only makes users happy but also helps search engines index your pages faster....

1. Average order value The first thing you need to understand is the fact that the higher the average order value gets, the more research your audience will have to invest in order to make the leap. This is one of the simplest calculations to make, due to the fact that all you have to do is take your total revenue and divide it by the number of placed orders....

To create a function in Bash, you use the function keyword followed by the name of the function and a pair of curly braces that enclose the commands that make up the function. For example: This creates a function called greeting that simply outputs the string “Hello, world!” when it is called. To call a function, you simply type its name in your shell script. For example: This will execute the commands within the greeting function, which in this case is just the echo command....

In this article, we will walk through the process of creating a shell script that monitors the disk space and sends an alert when the available space falls below a certain threshold. We will use the df command to check the available disk space and the mail command to send the alert. Step 1: Check the Available Disk Space The first step in our shell script is to check the available disk space on the server....

Now, You can either configure a custom 404 error page on your server or redirect the website to the home page. In this tutorial, we will help you to create a custom 404 error page for your Apache server. Create A Custom 404 Error Page First of all, create a 404 file on your server. You can create this file under the document root of your application. For example, I have created a file named custom_404....

Recommended: Htop – An Interactive Process Viewer for Linux Glances monitoros following things on system. CPU, Memory and LOAD Process list Network interface Disk I/O, IRQ / Raid Sensors Filesystem (and folders) Docker Alert System info Uptime Step 1 – Glances Installation Glances provide installation scripts for Linux system. You can use one of the following methods to install Glances on your system. Using Package Manager: If Glances is not available under package manager for your operating system, Use following installation script provided by Glances official team....

This tutorial described you step-by-step tutorial to install Apache Kafka on Ubuntu 20.04 LTS Linux system. You will also learn to create topics in Kafka and run producer and consumer nodes. Prerequisites You must have sudo privileged account access to the Ubuntu 20.04 Linux system. Step 1 – Installing Java Apache Kafka can be run on all platforms supported by Java. In order to set up Kafka on the Ubuntu system, you need to install java first....

Step 1 – Prerequisites Eclipse required Java to be installed on your system. Make sure you have proper Java installed. If you don’t have Java installed, Use below link for the JDK/JRE installation on your system. Install Java 8 on CentOS, RHEL, and Fedora Install Java 9 on CentOS, RHEL, and Fedora Step 2 – Download Eclipse Eclipse IDE is available for Java EE developers, JAVA developers, PHP developer, C and C++ developers, JavaScript developers, and many other programmers....

The Laravel framework also provides a command-line interface (CLI) known as Artisan. It provides helpful commands to perform operations for your applications. This article will help you to install the Laravel PHP Framework on CentOS 8 systems. Prerequisites The newly installed system’s follow initial server setup. Shell access with sudo privileges account. Step 1 – Installing LAMP Stack First of all, Laravel required LAMP stack to be running LAMP stack on your CentOS 8 system....

In this article, we will see how to install Node.js on Ubuntu and its derivatives via a new official PPA repository. If you are new to Ubuntu or any other Linux operating system, then be sure to check out our beginner’s guide first. You can also use the popular Node Version Manager (NVM) for installing specific Node.js version on your system. Step 1 – Configuring Node.Js PPA Node.js releases are available in two types, one is the LTS release, and the other is the current release....

This tutorial describes the installation and configuration of two VirtualHost on Apache with separate PHP versions. First VirtualHost will work with PHP 8.1 and another VirtualHost will run with PHP 7.4. So just go through this tutorial. You can also use more than two PHP versions with Apache as required but this tutorial covers two only. Installing Apache2 Install Apache web server from the official repository. Launch terminal on your system or login with ssh for remote systems....

All the Python developers are recommended to use a virtual environment for the applications. Which provides an isolated environment for the application with a defined Python version. Switch Python Version on Ubuntu & Debian The update-alternatives command-line tool is to create and maintain symbolic links for the default commands. With the help of this, we can easily switch commands to different versions. For, this tutorial, Python 3.10, and Python 2....

Prerequisites You have installed the NRPE client on your Linux system. Use the following commands to install NRPE on your system or visit our tutorials for the NRPE installation on Debian based systems and Redhat based systems. Ubuntu and Debian based systems:sudo apt install nagios-nrpe-server Redhat, CentOS systems:sudo dnf install nrpe nagios-plugins NRPE default configuration file is /etc/nagios/nrpe.cfg. You need to edit this file for making changes as per the next instructions....

The following step will configure the Postfix server to relay emails from a remote SMTP server with authentication. Postfix SASL Authentication provides a secure way to transfer emails, and it’s easy to set up. It also allows you to customize the authentication process, so if you want to use things like two-factor authentication or IP whitelisting, you can. Overall, Postfix SASL Authentication is a great option for anyone who needs a secure and reliable way to transfer emails....

Lets Encrypt is a free and open certificate authority by the non-profit Internet Security Research Group (ISRG). Its provides free ssl certificates for the domains valid for 90 days. You can easily renew certificates before expiration manually or schedule it to renew automatically. This tutorial will describe you to setup Let’s Encrypt SSL certificate with Webmin hostname. Change Webmin Hostname First, make sure you have a valid domain name configured with Webmin....

As you know, In Linux everything is treated as a file. A folder is also known as directory file denoted by ‘d‘ in the permission section. The below command will set the owner to www-data and group-owner to ubuntu for all files and directories and subdirectories. Use the chmod command to change the permissions for all files, directories, and subdirectories. Note – The permission 755 is good to set for directories but not on files....

As of today, The CentOS 8 Linux operating system is the latest available version of CentOS. The desktop provides an attractive GUI for working with it. You can easily change or set a static IP address on your Desktop system. Step 1 – Open Network Settings Login to your CentOS 8 Desktop system. After that open settings windows on your CentOS Desktop machine as showing in the below screen....