The tutorial differentiates between the ‘sudo’ and ‘su’ commands in Ubuntu Linux and their application. ‘Sudo’, standing for superuser do or substitute user do, runs a high shell without the need for user identity, allowing commands to be run with root power. ‘Su’, or switch user, lets users change their current account to any account…

This tutorial teaches how to install the ELK Stack (Elasticsearch, Logstash, Kibana, and Beats) on Ubuntu. This process involves preparing Ubuntu, installing Java, Elasticsearch, Kibana, Logstash, and Filebeat. By integrating these tools, one can create a robust search and analytics platform to run services. Configurations and installations are done through a series of command prompts.

This tutorial provides step-by-step instructions on installing Graphical Network Simulator-3 (GNS3) on Ubuntu 20.04 | 18.04. GNS3 is a network software emulator that allows network professionals to design, test, and troubleshoot virtual networks without purchasing expensive hardware. The tutorial covers installation from the official PPA repository, IOU support, Docker CE, and adding user account to…

The guide offers a walkthrough on how to install ConfigServer Security & Firewall (CSF) on Ubuntu 20.04/18.04. CSF is open-source firewall software providing robust security for Linux servers including intrusion detection. The tutorial demonstrates how to install CSF by downloading and executing its install scripts. It guides through configuring CSF, accessing its web interface, and…

This tutorial explains how to install the Chef automated server on Ubuntu 20.04 | 18.04. Chef is a configuration management tool that automates IT resource deployment and management. The guide details installing the Chef server, including preparing Ubuntu, downloading and installing Chef Automate, accepting licensing terms, creating an admin account, and setting up an organization.…

This is a tutorial on how to install ReactJS, an open-source JavaScript library for creating interactive user interfaces, on Ubuntu 20.04 or 18.04. The tutorial includes the necessary steps to install Node.js, npm, and the Yarn package manager. It guides users through creating their first React app, testing it, building it for production, and finally…

This post provides a tutorial on using the ‘chattr’ command in Ubuntu Linux, a tool used to modify file attributes. It walks through the syntax of the command, defines operator and option values, and provides examples of usage. It also discusses how to make a file immutable and previews the command’s help page.

This tutorial demonstrates how to install and configure Fail2ban on Ubuntu 20.04 and 18.04 to enhance Linux server security. Fail2ban protects servers from brute force and other automated attacks by scanning server logs for malicious activity and banning offending IPs via the system’s firewall. After installation, configuration involves creating a ‘.local’ file for specific adjustments,…