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.
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How to Install Steam on Ubuntu 20.04
Steam is a cross-platform entertainment platform developed by Valve Corporation for purchasing and playing video games. It gives you access to thousands of games and allows you to meet new people. This article explains how to install the Steam client on Ubuntu 20.04. Prerequisites # You’ll need to be logged in as a user with
Sysctl Command in Linux
As a Linux system administrator, sometimes you may need to modify the default kernel’s behavior. For example, you may need to enable the magic SysRq key or to increase the number of connections that Kernel will accept. The kernel parameters can be set when building the kernel, on system boot, or at runtime. This article
How to Install OpenCV on Ubuntu 20.04
OpenCV (Open Source Computer Vision Library) is an open-source computer vision library with bindings for C++, Python, and Java and supports all major operating systems. It can take advantage of multi-core processing and features GPU acceleration for real-time operation. OpenCV is used for a wide range of applications, including medical image analysis, stitching street view
How to Install Elasticsearch on Ubuntu 20.04
Elasticsearch is an open-source distributed full-text search and analytics engine. It supports RESTful operations and allows you to store, search, and analyze big volumes of data in real-time. Elasticsearch is one of the most popular search engines powering applications that have complex search requirements such as big e-commerce stores and analytic applications. This guide explains
How to Install Kvm on Ubuntu 20.04
KVM (Kernel-based Virtual Machine) is an open-source virtualization technology built into the Linux kernel. With KVM to run multiple Linux or Windows guest virtual machines. Each guest is completely isolated from the others and has its own operating system and dedicated virtual hardware such as CPU(s), memory, network interfaces, and storage. This guide provides instructions
How to Force HTTPS using .htaccess
If you installed an SSL certificate for your domain, your next step should be to configure the application to serve all web traffic over HTTPS. Unlike HTTP, where requests and responses are sent and returned in plaintext, HTTPS uses TLS/SSL to encrypt the communication between the client and the server. There are several advantages of
How to Install TensorFlow on Ubuntu 20.04
TensorFlow is a free and open-source platform for machine learning built by Google. It is used by a number of organizations, including Twitter, PayPal, Intel, Lenovo, and Airbus. TensorFlow can be installed system-wide, in a Python virtual environment, as a Docker container, or with Anaconda. This tutorial explains how to install TensorFlow in a Python
How to Comment in Python
When writing Python code, it is always a good practice to make your code clean and easily understandable. Organizing the code, giving variables and functions descriptive names are several ways to do this. Another way to improve the readability of your code is to use comments. A comment is a human-readable explanation or annotation that
How to Install CouchDB on Debian 10 Buster
Apache CouchDB is an open-source NoSQL database developed by the Apache Software Foundation. It uses JSON to represent data stored in a database. The CouchDB replication allows you to synchronize two or more CouchDB databases. CouchDB RESTful HTTP/JSON API allows you to read, edit, delete and create database documents. In this tutorial, we will explain