How to Secure Nginx with Let’s Encrypt On Ubuntu 20.04 / 18.04


This guide shows you how to secure your Nginx with Let’s Encrypt that generates SSL/TLS certificates for your domain. In addition, you will learn how to enabled Certbot to renew certificates automatically.

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The Difference Between Backup vs Replication


This article briefly explains the concepts behind backup and replication. A clear-cut table provides an excellent overview of all the features that set them apart.

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How to use Linux Shutdown Command with Examples


The shutdown command is used to shut down the system immediately, schedule a shutdown, inform users of such processes, or even cancel it. LEarning how to use the shutdown command is important for any Linux user.

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How to Install Cassandra on Ubuntu


This tutorial covers everything you need to do in order to install Apache Cassandra on your Ubuntu machine. Follow the steps for installing Java and other dependencies before you run the Cassandra installation.

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How to Fix Could not get lock /var/lib/dpkg/lock Error on Ubuntu


This tutorial lists the steps that will help you fix the E: Could not get lock /var/lib/dpkg/lock error you may get on Ubuntu while trying to install an application. In some cases waiting helps, but in other, you may have to try one of the methods…

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What is a NoSQL Database?


The article provides a detailed explanation of what a NoSQL databases is and how it differs from relational databases. It focuses on the strengths and weaknesses of the non-relational database model using many practical examples.

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How to Use rsync to Back up Data


To back up your files to another location on the same machine, or over a network to a remote destination, use rsync. This guide will show you how to safely back up your files locally and over SSH to another machine.

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How to Install Cassandra on Windows 10


This in-depth tutorial explains how to install Cassandra on Windows 10. The abundance of images in this tutorial makes installing Cassandra on Windows very easy. Besides learning how to install Cassandra on Windows the guide also shows you how to…

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Hadoop vs Spark – Detailed Comparison


This article explains how Hadoop and Spark are different in multiple categories. The tools are both free, but there is more than meets the eye. Learn how they compare working alone and if they can work together.

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Linux Kernel 5.7 Released: 12 New Features to Consider


Linux released its latest LTS kernel version, the Linux kernel 5.7. Take a look at all the new features and updates you can expect to find. Keeping your kernel up-to-date is important for system security and functionality. This guide will also show…

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