In this guide, you will build a media API in Node.js with Express and ffmpeg.wasm a WebAssembly port of the popular media processing tool. You'll build an endpoint that extracts a thumbnail from a video. By the end, y...

Great Expectations is an open source data validation and documentation library written in Python. It allows you to establish assertions about your data called Expectations, and validate any data using those Expectatio...

In CSS, it is possible to select an element based on its relationship or proximity to another element. In this tutorial, you will use several CSS-relationship-based approaches to select and style elements on an HTML p...

Build tools are an important part of the development experience, but a spec called import maps will allow you to both import external code into your project without a build tool. In this tutorial, you will create and ...

This guide provides a quick reference to OpenSSL commands that are useful in common, everyday scenarios. Similar to a cheat sheet for OpenSSL commands.

In this tutorial, you'll build a small web application that demonstrates how to handle common errors one encounters when developing a web application. You'll create custom error pages, use the Flask debugger to troubl...

This guide focuses on identifying and troubleshooting the most commonly encountered HTTP error codes, i.e. 4xx and 5xx status codes, from a system administrator's perspective. There are many situations that could caus...

In this guide, you will install various versions of the Java Runtime Environment (JRE) and the Java Developer Kit (JDK) using apt . You'll install OpenJDK as well as official packages from Oracle. You'll then select t...

Themes in Gatsby refer to plugins that act as a collection of configuration options, functionality, and/or user interface (UI) elements. Separating out shared features into maintained themes makes keeping your site up...

In a standard configuration, the SSH server grants file transfer access and terminal shell access to all users with an account on the system. In this tutorial, we'll set up the SSH daemon to limit SFTP access to one d...

FTP, which is short for File Transfer Protocol, is a network protocol that was once widely used for moving files between a client and server. vsftpd, very secure FTP daemon, is an FTP server for many Unix-like systems...

Interfaces in TypeScript enable you to represent and document various data structures. In this tutorial, you'll create interfaces, learn how to use them, explore the differences between normal types and interfaces, an...

Terraform modules encapsulate distinct logical components of your infrastructure by grouping their resources together. In this tutorial, you'll create a Terraform module that will set up multiple Droplets behind a Loa...

In general, Docker containers are ephemeral, running just as long as it takes for the command issued in a container to complete. By default, any data created inside the container is only available from within the cont...

Virtual Network Computing, or VNC, is a connection system that allows you to use your keyboard and mouse to interact with a graphical desktop environment on a remote server. In this guide, you'll set up a VNC server o...

Redis is an in-memory key-value store known for its flexibility, performance, and wide language support. This tutorial demonstrates how to install and configure Redis on an Ubuntu 18.04 server.

Vuex is the first-party development state management library for Vue.js. Vuex follows the principle that Redux has popularized over the past years: Data flows in one direction, with actions and mutations modifying dat...

This tutorial will guide you through installing Anaconda on an Ubuntu 18.04 server. Designed for data science and machine learning workflows, Anaconda is an open-source package manager, environment manager, and distri...

Ruby on Rails is one of the most popular application stacks for developers looking to create sites and web apps. Using rbenv will provide you with a solid environment for developing your Ruby on Rails applications as ...

The sudo command is useful for executing commands with privileges usually outside of the scope of your user. This guide will discuss how to edit the configuration file in order to customize the way sudo functions.