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How To Troubleshoot and Inspect Kubernetes Networking

Kubernetes is an open-source tool that is crucial in container orchestration. Kubernetes helps in orchestrating and managing clusters at scale across various cloud environments or even on-premise servers. A cluster is a set of hosts meant for running containerized applications and services. A cluster needs a minimum of two nodes to work – one master node and a worker node. …

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Building and Installing Go Programs

Go is a statically typed programming language. Originally designed by Google, Go shares similarities with C in terms of syntaxes. However, in functionality, Go comes with additional features like memory safety, garbage collection, structural typing, etc. Over the past few years, Go has been gaining incredible popularity. This guide will go over the steps of building and installing Go programs …

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Mail Server Configuration Tutorial: How to Use Postfix, Dovecot, MySQL, and SpamAssassin

Introduction On Ubuntu 20.04, you can use tools like Postfix, Dovecot, MySQL, and SpamAssassin to configure a mail server. The process can be confusing for someone attempting it for the first time. This tutorial aims to simplify the mail server configuration process for you with detailed steps. At the end of this tutorial, you will know how to add virtual …

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Setting up Ruby on Rails with PostgreSQL

Among all the available database engines, PostgreSQL is one of the most popular ones. It’s a well-known open-source database system known for its reliability, robust features, and performance. Because PostgreSQL is a popular choice, it’s supported by almost all major web frameworks. Similar to its competitors MySQL and SQLite, PostgreSQL also has its strong and weak points. Ruby on Rails …

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Creating Django Models: A Tutorial

Django is a well-known web framework for the rapid development of secure and maintainable websites and web apps. Built using Python, Django simplifies web development, allowing more time and focus on writing apps without reinventing the wheel every single time. Django is a free and open-source project with robust official documentation, great community support, and plenty of free and paid-for …

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Installing Docker Compose on CentOS 7

Dockerisation has redefined the deployment and automation process in the software industry. Since its inception, the Docker team has continuously strived to make automated deployment seamless. Containerization technology does not just enable rapid application development and efficiency, but also saves time and strenuous efforts. Unbeatable functionalities such as orchestrating, defining, and running multi-container applications together make Docker a favorite pick …

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Writing Modules in Python 3: A Tutorial

Introduction Python is one of the most commonly used programming languages across the world. Modules are a critical part of the Python code. A module is simply a .py file in the context of Python 3. This means that you can refer to any Python file as a module. It is possible for you to obtain these modules through the …

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Installing Go on Ubuntu 20.04

Go is an open-source programming language. Originally designed at Google, Go shares syntax similarities with C. However, it includes additional programming features like structural typing, garbage collection, memory safety, and CSP-style concurrency. Most of the time, the Go programming language is referred to as “Golang” because of the official Go domain name. This guide demonstrates installing and configuring the latest …

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Python 3 Tutorial: Indexing and Slicing Strings

Introduction Python is one of the most popular programming languages across the world. It uses a data type that comprises sequences made up of individual characters. These characters may be letters, numbers, symbols, or whitespace characters. Other types of sequence-based data types include lists and tuples. Just like them, you can also access, index, and slice strings in Python. In …

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How to Host a Docker Image Repository and Build Docker Images with GitLab Self-Managed Instance on Ubuntu 20.04

Containerization technology has greatly advanced in the software development tech space as the most accepted method of packaging and deploying applications in cloud environments. This has been necessitated by the need for continuous integration (CI) and continuous deployment (CD) which are defining aspects of DevOps. Software developers and engineers make use of containers to achieve the CI/CD aspect of software …

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How to Use an Elastic Standalone Container to Host WordPress with CloudSigma PaaS

In this tutorial, we will be discussing how you can install WordPress inside a standalone elastic container in order to make the solution even more cost-effective and lightweight than it already is. The WordPress Standalone package can be installed very easily through the CloudSigma PaaS platform. This means that with a single click, you can supplement your small and medium-sized …

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Using *args and **kwargs Parameters in your Code: a Python 3 Tutorial

Introduction Python is one of the most popular programming languages worldwide. In Python, parameters are a part of function definitions. They enable you to specify certain arguments for a function. The argument can be accepted and applied by the function. However, it is not possible for you to know at the time of coding what exact use cases may be …