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OAuth 2: An Introduction and Basic Guidelines

What is OAuth 2? The IETF OAuth 2.0 is an authorization framework that aims to give third-party applications limited access to a given HTTP service. A good place to start when trying to learn about OAuth 2 is to go through its specifications. Thus,  you can maximize the functionality you get out of it. If you need to access certain …

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How to Ensure Security While Transferring Files With The Help Of SFTP

When you need to transfer data and files between two computers, there are two protocols that can finish the job. Тhe typically used method is the FTP or the File Transfer Protocol. However, rising concerns over the security of data moved from one device to another have encouraged the use of SFTP. SFTP stands for Secure File Transfer Protocol. It …

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Listing and Deleting Iptables Firewall Rules

Iptables is the primary firewall that comes with most of the Linux distros by default. It’s responsible for handling network security. It works by comparing the data packets against a set of rules, instructing the system to accept, refuse, or forward a connection according to the rules. In this tutorial, we will show you how to list and delete rules, …

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How to Use Roles and Manage Permissions in PostgreSQL

PostgreSQL is an open-source DBMS which in turn uses SQL. It’s a very powerful tool that is used to manage applications and host web data on VPS. In this tutorial, you will learn how to manage permissions in PostgreSQL. It will help you to provide your application roles the required permissions. We will perform this tutorial using PostgreSQL on a …

SSH keys

How To Use SSH to Connect to a Remote Server in Ubuntu

What is SSH? SSH means Secure Shell. With SSH you can access remote machines in a secure way since the connection is encrypted. With the ssh command from the Linux terminal, we can connect to remote Linux servers and work as if it were our computer. At the end of this tutorial, you should have a full understanding of how …

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Manage Systemd Services and Units with Systemctl

Introduction Sуѕtеmd is an init ѕуѕtеm аnd system mаnаgеr thаt has gained a lot of popularity recently. More than that, it is bесоming thе new ѕtаndаrd for Linux mасhinеѕ. Although thеrе are legitimate dоubtѕ аѕ tо whеthеr systemd iѕ аn imрrоvеmеnt оvеr traditional SуѕV initialization systems, most diѕtributiоnѕ have аlrеаdу switched tо ѕуѕtеmd, оr plan tо do so. In ѕhоrt, …

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How to Install Anaconda on Ubuntu 18.04 in Six Simple Steps

Introduction Anaconda is an open-source package manager and framework for handling machine learning and data science workflows. It also helps to distribute some programming languages ​​like Python and R. With over 7500 different scientific data packages, Anaconda helps process large-scale data, scientific computing, and predictive analysis. This package is available as a free and paid version. In this tutorial, we …

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How to Install the LEMP stack (Linux, Nginx, MySQL PHP) on Ubuntu 20.04

Introduction In the world of the internet, several technologies come together to form a solution that enables internet users to access dynamic content on the world wide web. LEMP stack is one of those solutions. It brings together four technologies that make a complete server solution for high-performance and dynamic websites. LEMP is an acronym for Linux, Nginx, MySQL, and …

VNC

How to Install and Configure VNC on Ubuntu 18.04

VNC (Virtual Network Computing ) allows you to use your server just like you use your computer- with the graphical user interface (GUI),  desktop, and your mouse and keyboard. It makes computing easier for users who are new to working on a server. Cloudsigma allows you to access VNC straight after creating the server. Along with that, in this tutorial, …

install Node.js on Ubuntu

How to install Node.js on Ubuntu 18.04

Node.js is an open-source platform that allows programmers to build dynamic web pages and applications. It is used widely for server-side scripting and allows users to use JavaScript for both client and server-side scripts. In this tutorial, you will learn how to install Node.js on Ubuntu 18.04 and get started with it. Prerequisites First, you have to create a machine. …