Category: Tutorials

A virtual machine is a simulated computer system which runs on a physical computer. In other words, a virtual machine is a computer inside a computer. Virtual machines allocate memory, a virtual CPU, disk storage space, and a network interface. This means that we can have a Windows computer that runs multiple virtual machines composed of Ubuntu Linux, macOS, Windows 10, Solaris, and CentOS, and they will all be completely separate from our parent Windows operating system.

What is RAID?

RAID (or a Redundant Array of Inexpensive Disks) is a way of storing logical data across a medium which is composed of multiple physical hard disk drives blended into one or more logical units or volumes that is used for data redundancy, performance improvement, and reliability.

High availability is the description of a system designed to be fault-tolerant, highly dependable, operates continuously without intervention, or having a single point of failure. These systems are highly sought after to increase the availability and uptime required to keep an infrastructure running without issue. The following characteristics define a High Availability system.

What is Systemctl? 

The systemctl command is a utility which is responsible for examining and controlling the systemd system and service manager. It is a collection of system management libraries, utilities and daemons which function as a successor to the System V init daemon. The new systemctl commands have proven quite useful in managing a servers services. It provides detailed information about specific systemd services, and others that have server-wide utilization.

What is nmcli?

nmcli stands for Network Management Command-Line Interface, and is a tool for managing the NetworkManager application and reporting on the status of the network. It can be utilized as a substitution for nm-applet or other similar graphical clients. nmcli is used to display, create, delete, edit, activate, deactivate network connections, and control and display network device status.

React.js (React) is an open-source JavaScript library useful in building user interfaces. React is a library so our main focus for this article is installing a JavaScript environment and a Package Manager so that we can download and install libraries including React.

If you are hosting more than one site on a server, then you most likely use Apache’s virtual host files to state which domain should be served out. Name based virtual hosts are one of the methods used to resolve site requests. This means that when someone views your site the request will travel to the server, which in turn, will determine which site’s files to serve out based on the domain name. Using this method you'll be able to host multiple sites on one server with the same IP. In this tutorial, we’ll show you how to set up your virtual host file for each of your domains on an Ubuntu 18.04 VPS server.

Introduction

Ansible is a system of configuration management written in Python programming language which uses a declarative markup language to describe configurations. It’s used for automation of configuration and OS setup. Ansible is often used to manage Linux-nodes, but Windows is also supported. It supports work with devices with Python v2.4 and higher installed through SSH connection. In this article, we are going to review the DevOps tool called Ansible.    

What is Bash?

Bash, or the Bourne Again SHell, is based on the Bourne shell. It is the default shell command language interpreter for GNU Linux/Unix and is accessed via a terminal. The shell was the original method for interacting with the operating system before GUIs were implemented. It has the ability to execute single commands, understand regular expressions, as well as scripts written in the bash language. It is currently the default interactive shell on most all modern Linux distributions.

The scope of information needed in a table can change overtime, and you may find you no longer need a whole column of data. Removing a column from a table can help get rid of unwanted content, like if a project or product is no longer needed, to help free up disk space on a server, to clean up any empty or unused columns, or even just remove data that may have been duplicated. Removing a column is quick and easy to do in PhpMyAdmin.