Author: Rahul

Postfix is a popular Mail transfer agent(MTA) which is a part of SMTP whose full form is Simple Mail transfer protocol and Postfix’s function is to transfer/send mails from one server to another. Postfix is known because of its determination of routes and sending emails; it is completely free and installable on all major Unix operating systems. Around 25% of all public servers use or run postfix on the internet. As it is installable on all major Unix operating systems, in this article we will provide a step-by-step guide about how to install and configure Postfix on Ubuntu 20.04. How…

Remote desktops can be used in a variety of ways to gain access to a computer for example VNC, RDP, ssh, XDMCP, ICA, and many others. The x11vnc is an example of a Virtual Network Computing (VNC) server that allows a remote client to connect to a computer running the x11vnc software and an X Window session by polling the X server’s frame buffer for updates. Remote desktops can come in very handy in many different ways. For example, you can access your office computer from home and even manage the entire IT infrastructure. There are many different situations where…

MongoDB is a free open-source, schema-free, NoSQL database which is getting more popular day by day among web developers. It is a document-oriented database and is known for its processing speed. In order to use MongoDB for our projects, we will first need to install it on our system along with its dependencies and some other tools. In this post, we will learn to install and set up Apache, PHP, and MongoDB on Ubuntu and Debian operating systems. Installing Apache First of all, we will install Apache on our system. Apache is a web server software and a popular HTTP…

If you’re a user that recently switched from Windows or macOS to Linux then Linux Mint Ulyana Desktop is the best option for you as it provides its users with new features and user-friendly GUI. If you’re already familiar with Linux and have used Ubuntu 20.04 in the past then this one is similar to it but with some extra and better features. Linux Mint 20 “Ulyana” offers three different desktop looks to its users which are Cinnamon, MATE, and Xfce, out of which the most preferred and favorite of users is Cinnamon. But if you’re looking for a lightweight…

Python is a high-level programming language, widely used for system programming. It is available for all popular operating systems. You can install more than one Python version on a single system. Once you have installed multiple Python versions, you can switch the default Python with the update-alternatives tool. 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…

While programming we often perform the same task repeatedly, such as performing the addition of numbers or printing the same statement with different inputs. These are general examples, but for these would you rather write the same code 10 times or just once? That’s the purpose of functions, they’re pieces of code only defined once for a particular task and come with reusable functionality so that users can call them whenever they want to perform a task. This makes your program understandable and debugging easier. Sometimes functions require some input and sometimes they may or may not return some value,…

Nmap (Network Mapper) is the most popular discovery tool used by Network Administrators for security auditing and mapping their network. This core tool is furthermore used for finding live hosts, OS detection, performing port scanning, and version detection. In order to detect various available hosts on the network, the services they’re offering, the version of operating system they’re running, and the type of firewall they are using, nmap uses the raw IP address. Whenever we’re having connectivity issues of network or firewall configuration, the first thing we check is which ports are open. There are several commands available to check…

Pip is a popular package management tool for Python. It allows the Python developers to install and manage additional Python libraries in their applications. This is a similar application to nvm for Node.js and composer for PHP. Pip stands for Preferred Installer Program. Rather than a package management utility, Pip can create a completely isolated environment for the Python application. In this tutorial, you will learn about the installation of Pip on the Debian 11 Linux system. Prerequisites This tutorial assuming that you already have installed Python 3 on your system. Next login to the Debian 11 system with sudo…

Oftentimes we want to record something on our screen. Whether for making a presentation or a video tutorial. Nowadays screen recording is becoming common, people are making youtube videos regarding various tutorials, how-to guides, and streaming games in which screen recording plays an essential role. As the importance and need of having a screen recorder tool on your system are increasing day by day, having a good tool that provides all the features users need is also increasing. Hence, today in this article we’ll discuss the Top 10 Popular Screen Recorder tools on Linux systems to help you understand better…

PHP Composer is basically a dependency management tool for PHP applications. It provides hassle-free installation of PHP modules for the applications. The composer keeps track of all the modules required for the application and installs them with a single command. It also allows users to keep modules updated. You can easily install all the required packages using Composer. The composer maintains a list of required packages in a JSON file called composer.json. Composer is a similar tool to npm for Node.js, pip for Python, and bundler for ROR. Composer 2 is the latest available version for your system with enhanced…