The fuser utility that comes preinstalled with Linux is a very powerful tool. As the name suggests, it provides information about the user or about the process that uses a particular file or directory. The functionality of the fuser utility is not limited to providing information about processes. The basic utility of the command fuser is to identify which processes use a particular file or...

Ansible can be described as an open-source configuration management app, allowing a user to provision software and provides tools to deploy apps on a wide variety of physical and virtual servers, regardless of the OS, both on Unix, Linux, and Microsoft Windows. It also features its’ own language which helps developers describe the system configuration. We can do the following using Ansible...

In Linux, unlike other operating systems, largely because it is a multi-user system, we will encounter a unique system for managing the rights to files and folders that derives from the Unix based system. Users who can access files or folders are divided into three categories: owner – the owner, who created the file or directory group – a member of the group to which the owner belongs...

A search engine is a searchable program that accesses the Internet automatically and frequently and stores the title, keywords and, in part, even the content of the web pages in a database. When a user dials a search engine to find information, a phrase or a word, the search engine will look into this database and, depending on certain priority criteria, will create and display a list of hit-list...

Django is a high-level Python Web Framework that is built on the following principles: 1. Creating apps fast 2. Clean and pragmatic design with reusable code 3. Performance 4. Elegance Django is an open source framework software that aids in the development of Python web apps that follows the Model-View-Controller architectural model. The main purpose of this software framework created for web...

PyGame can be defined as an ultraportable open source Python library used to create games and multimedia applications based on the SDL library. To draw, we need a window. To create such a window, call the set_mode () function in the example below. This function receives as argument a tuple with 2 elements representing the resolution of the window. import pygame screen = pygame.display.set_mode...

Redis is a different data storage paradigm when compared to SQL data systems. The Redis developers are calling it a data structures server, an excellent naming convention because the Redis philosophy starts from the idea that data should be stored in RAM. In this way, Redis can perform high-speed operations in principle, eliminating the tedious process we encounter, for example, in SQL, where...

For those of you who have not heard of MongoDB yet, this can be categorized as a document-oriented database system. Classified as a NoSQL database, MongoDB uses JSON documents with dynamic schemes as opposed to the relational database structure, which makes data integration faster and more comfortable in certain types of applications. MongoDB is an open-source NoSQL database written in C ++. It...

Emacs is a class of text editors that work on a wide variety of platforms characterized by adjustability. The editing commands in Emacs can be defined by the installed packages or can be set by the user. The user can also combine commands into macros to automate repeated controls. Emacs development began in 1975, and it is continuously developed today also. Emacs are very popular with...

An issue that plagues both regular users and webmasters is when they encounter issues with access to individual webpages or even to entire websites on the internet. Instead of the requested page with the text and media files, you get an Nginx 403 Forbidden error, an issue we will try to provide a solution now, both for regular users but also for website administrators. What does Nginx 403...