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id is a command-line utility that prints the real and effective user and group IDs.

Apache Tomcat is an open-source implementation of the Java Servlet, JavaServer Pages, Java Expression Language, and Java WebSocket technologies. It is one of the most widely adopted applications and web servers in the world today. Tomcat is simple to use and has a robust ecosystem of add-ons.

Java is one of the most popular programming languages used to build different kinds of applications and systems. This guide explains how to install Java (OpenJDK) on Raspberry Pi with the latest Raspbian OS running on it.

OpenCV (Open Source Computer Vision Library) is an open-source computer vision library and has bindings for C++, Python, and Java. It is used for a vast range of applications, including medical image analysis, stitching street view images, surveillance video, detecting and recognizing faces, tracking moving objects, extracting 3D models, and much more.

Git is a distributed version control system that’s being used by most software teams today. It allows you to keep track of your code changes, revert to previous stages, create branches, and to collaborate with your fellow developers. This tutorial explains how to install Git on Raspberry Pi.

ownCloud is an open-source, self-hosted cloud platform for managing and sharing files. It can be used as an alternative to Dropbox, Microsoft OneDrive, and Google Drive. ownCloud is extensible via apps and has desktop and mobile clients for all major platforms. This tutorial explains how to install and configure ownCloud with Apache on CentOS 8

Mono is a platform for developing and running cross-platform applications based on the ECMA/ISO Standards. It is a free and open-source implementation of Microsoft's .NET framework. This tutorial explains how to install Mono on Ubuntu 18.04.

Gitea is a self-hosted open source git server written in Go. It is a fork of Gogs. Gitea includes a repository file editor, project issue tracking, users managements, notifications, built-in wiki, and much more. Gitea is a lightweight application and can be installed on low-powered systems. This tutorial explains how to install and configure Gitea on Ubuntu 18.04. The same instructions apply for Ubuntu 16.04 and any other Debian-based distribution.

Let's Encrypt is a certificate authority created by the Internet Security Research Group (ISRG). It provides free SSL certificates via a fully automated process designed to eliminate manual certificate creation, validation, installation, and renewal. Certificates issued by Let's Encrypt are valid for 90 days from the issue date and trusted by all major browsers today. Learn how to install a free Let's Encrypt SSL certificate on Debian 10, Buster running Apache as a web server.

Anaconda is the most popular Python/R data science and machine learning platform. It is used for large-scale data processing, predictive analytics, and scientific computing. In this tutorial, we will explain how to install Anaconda Python Distribution on CentOS 8.

There are several ways to redirect to HTTPS in Apache. If you have root access to the Linux server where Apache runs, the preferred way is to set up the redirection in the domain's virtual host configuration file. Otherwise, you can set up the redirection in the domain's .htaccess file.

Apache Maven is an open-source project management and comprehension tool used primarily for Java projects. Maven uses a Project Object Model (POM), which is essentially an XML file containing information about the project, configuration details, the project's dependencies, and so on. In this tutorial, we'll explain how to install Apache Maven on CentOS 8.

TensorFlow is an open source platform for machine learning built by Google. It can runs on CPU or GPU on different devices. TensorFlow can be installed system-wide, in a Python virtual environment, as a Docker container, or with Anaconda. In this tutorial, we'll explain how to install TensorFlow in a Python virtual environment on Debian 10.

The /etc/shadow file keeps records about encrypted users' passwords, as well as other passwords related information.

Vagrant is a command-line tool for building and managing virtualized development environments.

Apache Cassandra is a free and open-source NoSQL database with no single point of failure. It provides linear scalability and high availability without compromising performance.

In Bash, there are multiple ways to append text to a file. This article explains some of them.

The command line gives you more power over your system and access to features that are not available through a graphical interface.

Apache CouchDB is a free and open-source NoSQL database developed by the Apache Software Foundation. It can be used as a single-node or clustered database.

Secure Shell (SSH) is a cryptographic network protocol used for an encrypted connection between a client and a server. The ssh client creates a secure connection to the SSH server on a remote machine. The encrypted connection can be used to execute commands on the server, X11 tunneling, port forwarding, and more. Learn how to use the OpenSSH command-line client to log in to a remote machine and run commands.