One of the basic operations when working with any databases is adding new users to access the database and granting the necessary permissions to these users. In this article we will consider this important issue on the example of one of the most popular relational databases - PostgreSQL. This article will be useful for anyone who is just starting their journey in working with databases.

One of the biggest problems for any Internet resource has long been the so-called “distributed denial of service” attacks or DDoS attacks. They are a very serious tool in the hands of attackers, which they use for various purposes, from competition between market participants, to extortion and banal maliciousness. In this short article we will study the basic concepts related to DDoS and analyze the basic methods of countering these attacks.

If you are a developer of software or web services and work with APIs, you have definitely encountered the “405 Method Not Allowed” error. In this article we will understand what this error is, find out the reasons for its occurrence and learn how to fix problems related to getting this error. This article will be useful not only for beginners, but also for experienced developers.

In one of the previous articles we got acquainted with such a framework as Kanban, a convenient tool for software development. Today we will get acquainted with the leader among project management frameworks, which is now used by hundreds of thousands of teams all over the planet - SCRUM. Let's consider the history of its origin and analyze its main differences from other frameworks.

One of the most commonly used data structures in any programming language is lists. And the most popular programming language Python is no exception. In this article, we will learn how to determine the length of a list, and also understand possible pitfalls when determining the length of nested lists. This article will be useful not only for beginner programmers, but also for those who, for one reason or another, are looking for alternative methods for calculating the length of lists.

In the previous article, we considered several of the most popular operating systems that are usually chosen for installation on VPS servers. And today we want to introduce you to some of the latest operating systems, which, in our opinion, deserve attention and may become popular in the future, having earned their share of the market.

If you have decided to rent a VPS server, but do not know which operating system distribution to choose to install on it, so that it meets all your requirements - then this article is for you. Here we will get acquainted with the six most popular Linux distributions and discuss the strengths and weaknesses of each of them.

Virtual environments have become a must-have tool in any developer's arsenal, as they allow isolating the development environments of individual applications to prevent conflicts between different system components or components of different versions. In this article, we will introduce the Virtualenv tool for Python3, as well as look at examples of its use and explore best practices for its use.

The number of websites on the Internet is growing tremendously and WordPress is the tool that made it possible, as it allows you to create websites in a user-friendly interface, even without special knowledge and skills in working with HTML and CSS. Thanks to this - more than 40% of all websites on the internet are now built on WordPress. In this article, we will look at the top 5 additional plugins for WordPress, which will allow you to bring your site to a new level, both in search results and in the field of security.

Most Internet users have encountered the Connection Refused error at least once when visiting websites, accessing network services, or connecting to remote servers. Finding the cause of this error, and there may be several, and eliminating it requires a systematic approach, which is described in this article.