DevOps and Development

Docker environment variables are a practical way of externalizing containerized app configuration. This article shows you how to set Docker environment variables in the Dockerfile, and override them using Docker CLI and Docker Compose.

Rust is a general-purpose programming language known for its speed, memory efficiency, and seamless integration with other languages.
Read this tutorial to learn how to install Rust on Ubuntu.

The ls command (short for “list”) lists information about directories and any type of files in the working directory. Learn how to use ls command in this article.

The date command is used to display and set the system date and time. Learn how to use the date command and set the date/time/timezone of your Linux server.

The tutorial explains how to install Spark on Windows and includes a simple test to ensure your Spark installation is working correctly.

Mastering basic Vim commands includes learning how to undo and redo changes in this text editor. Knowing how to undo and redo in Vim will help you speed up and simplify working with content and files.

This tutorial explains how to install Apache Spark on Ubuntu and provides essential start and stop commands for the master and worker servers.

Complete guide on how to use crucial Vim commands - copying (yanking), cutting (deleting), and pasting (putting). There are different ways to navigate through text and edit content. Find out what these are and how to use them.

Speed up connecting to remote servers by enabling passwordless SSH login via public key authentication. In this guide you will learn how to set up and enable passwordless login.

Need to check your Java version? Use one of these three methods to find the Java version installed on your system (Ubuntu, CentOS, or Debian).