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Fail2ban is a tool that helps protect your Linux machine from brute-force and other automated attacks by monitoring the services logs for malicious activity. It uses regular expressions to scan log files.

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. Apache Cassandra is used by many companies that have large, active data sets, including Reddit, NetFlix, Instagram, and Github. This article guides you through the installation of Apache Cassandra on Ubuntu 20.04.

Tor Browser is a customized version of Firefox that routes the web traffic through the Tor network, making it private and anonymous. When you browse the Internet with the Tor Browser, the connection to the website you are viewing is encrypted and protected from network surveillance and traffic analysis. This article describes how to install the Tor web browser on Ubuntu 20.04.

This article explains how to install Sublime Text 3 on Ubuntu 20.04. Installing Sublime on Ubuntu is fairly straightforward. We’ll enable the Sublime repository, import the repository GPG key, and install the editor. The same instructions should work on any other Debian-based distribution.

MongoDB is a free and open-source document database. It belongs to a family of databases called NoSQL, which is different from the traditional table-based SQL databases like MySQL and PostgreSQL. This tutorial describes how to install and configure MongoDB Community Edition on Ubuntu 20.04.

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. CouchDB server stores its data in named databases, which contains documents with JSON structure. Each document consists of a number of fields and attachments. Fields can include text, numbers, lists, booleans, more. This article covers the steps of installing the latest version of CouchDB on Ubuntu 20.04.

Gitea is a self-hosted open-source git server written in Go. It comes with a repository file editor, project issue tracking, users managements, notifications, built-in wiki, and much more.

Nagios keeps an inventory of your entire IT infrastructure and ensures your networks, servers, applications, services, and processes are up and running. In case of failure or suboptimal performance, Nagios will send notification alerts via various methods. This article explains how to install Nagios on Ubuntu 20.04.

This series of articles explains how to install Apache, create Apache virtual hosts, generate a free Let’s Encrypt SSL certificate, install and secure MySQL and install PHP 7.4. If you are in a hurry, you can install LAMP Stack on your Ubuntu 20.04 server by following our Quickstart section.

Secure Shell (SSH) is a network protocol for creating a secure connection between a client. With SSH you can run commands on remote machines, create tunnels, forward ports, and more. This article explains how to generate SSH keys on Ubuntu 20.04 systems. We’ll also show you how to set up an SSH key-based authentication and connect to remote Linux servers without entering a password.

This article explains how to install Apache Cassandra on CentOS 8.

SFTP (SSH File Transfer Protocol) is a secure file protocol for transferring files between two hosts over an encrypted connection. It also allows you to perform various file operations on remote files and to resume file transfers. This article explains how to change the default SFTP port in Linux. We will also show you how to configure your firewall to allow on the new port.

This article describes how to create tar.gz files. In Linux operating systems, you can use the tar command to create tar archives. The command can also compress archives using a vast range of compression programs with gzip is the most popular algorithm.

In this article, we’re going to explain how to use cURL to make POST requests. The HTTP POST method is used to send data to the remote server.

Let’s Encrypt is a free, automated, and open certificate authority developed by the Internet Security Research Group (ISRG) that provides free SSL certificates. Certificates issued by Let’s Encrypt are trusted by all major browsers and valid for 90 days from the issue date. This tutorial explains how to install a free Let’s Encrypt SSL certificate on Ubuntu 20.04, running Nginx as a web server. We’ll also show how to configure Nginx to use the SSL certificate and enable HTTP/2.

This article shows how to delete lines in Vim/Vi.

When troubleshooting system or application slowdown or misbehavior, one of the first things to check is the system memory usage. This article explains how to check RAM usage in Linux using several different commands.

In this article, we will show you several different ways to find the number of files in a directory in Linux.

With DevOps, and a merged development and operations team, we can release small features at a faster pace. Operations related tasks can be carried out in parallel to the usual development activities. In this article, we will guide you through how to set up a DevOps pipeline in AWS.

Memcached is a free and open-source high-performance in-memory key-value data store. It is generally used to speed up applications by caching various objects from the results of API and database calls. The memcached package is included in the default Ubuntu 20.04 repositories. This article shows how to install and configure Memcached on Ubuntu 20.04.