Introduction When it comes to system security, it is essential to restrict root access as much as possible, especially when multiple users have access to the system. One of the ways a user can gain root access is by invoking the “su” command. While the su command allows a user to switch from one user account to another, it can be misused or abused by users with sudo privileges. In this article, we will explain what “su” access for sudo users means, why it's important to disable "su" access for sudo users and how you can do this. ... Read More

Introduction Linux is an open-source operating system that is widely used by developers, system administrators, and individuals who prefer a non-proprietary operating system. A Linux distribution, often simply called a "distro, " is a customized version of the Linux operating system that includes different software packages and configurations to fit specific needs. There are hundreds of Linux distributions available, ranging from popular ones like Ubuntu and Fedora to specialized ones like Kali Linux for cybersecurity professionals. Planning Your Distribution Identifying your goals and target audience Before starting, it is essential to identify your goals and target audience. What do you ... Read More

Introduction One of the most important components of a functioning operating system is the boot process. Notably, it is also one of the most complex and essential processes in any operating system. Linux-based operating systems can encounter issues during this process that prevent them from starting up properly. Such issues can be frustrating and even disheartening for users who rely on their Linux systems for work, school or personal use. There are multiple causes for boot issues in Linux, including hardware problems, software misconfiguration or corruption, and even user errors. These issues can manifest themselves in many ways: ... Read More

Introduction Red Hat Enterprise Virtualization, or RHEV, is a virtualization platform developed by Red Hat Inc. that provides an open-source infrastructure for hosting virtualized workloads. It allows users to easily deploy virtual machines on top of a set of physical hosts, known as hypervisors. The RHEV environment consists of two main components: the management platform, which manages the entire infrastructure through a web-based interface called RHEV Manager; and the hypervisor hosts that run the virtual machines. Preparing for Virtual Machine Deployment System Requirements Before deploying virtual machines in a RHEV environment, it is important to ensure that your system meets ... Read More

Introduction RedHat Enterprise Virtualization Hypervisor (RHEV-H) is a virtualization platform that provides an end-to-end, high-performance, and scalable solution to meet the needs of modern data centers. RHEV-H is based on the open-source Kernel-based Virtual Machine (KVM) hypervisor, which allows for hardware-based virtualization, enabling multiple operating systems to run on a single physical machine. With RHEV-H, organizations can create an infrastructure that is easier to manage and more cost-effective. Preparing for Deployment System requirements for RHEV-H deployment Before deploying RedHat Enterprise Virtualization Hypervisor (RHEV-H), it is important to ensure that the system meets the minimum hardware and software requirements. The following ... Read More

Introduction NGINX is a popular open-source web server that also functions as a reverse proxy, load balancer, and HTTP cache. A reverse proxy is a server that sits in front of web servers and forwards client requests to the appropriate backend server. The benefits of using NGINX reverse proxy include improved security, scalability, and performance. By acting as an intermediary between clients and servers, NGINX can also provide additional features such as caching, SSL termination, and content compression. In this article, we will discuss how to deploy NGINX reverse proxy on Docker – a platform that allows developers to easily ... Read More

Overview Nginx is a popular open-source web server that has been widely used for its high performance, scalability, and reliability. It is also commonly used as a load balancer and reverse proxy server. On the other hand, Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications. It provides a flexible architecture that can run on-premises or in the cloud. Nginx has become an essential component for many organizations that need to deploy their applications at scale. Pre-requisites Understanding of Kubernetes architecture and concepts Before deploying Nginx on a Kubernetes cluster, it is ... Read More

Introduction Virtual machines (VMs) are a powerful tool for creating and managing multiple operating systems on a single physical machine. They allow you to run different operating systems, applications, and services without the need for additional hardware. Instead of having multiple physical computers with their own dedicated resources, VMs share the resources of the host machine. Through this sharing of resources, VMs enable you to create isolated environments that can simulate different computing scenarios or test new software and applications without interfering with other processes. Setting up the Environment Installing KVM on the Host Machine Before deploying multiple virtual machines, ... Read More

Introduction HTML5 is the fifth and latest version of Hypertext Markup Language, which is the standard language used for creating web pages and applications. Unlike its predecessors, HTML5 offers a more efficient way of coding websites, making it easier for developers to create rich and interactive content. With HTML5, developers can use new tags like video and audio to include multimedia elements on their web pages without relying on third-party plugins. The canvas tag allows developers to create animations and graphics directly on a web page using JavaScript. Additionally, HTML5 provides better support for mobile devices by introducing responsive ... Read More

In today's world, data is the lifeblood of businesses. Whether it is customer data, sales data, or product data, the ability to store, search, and analyze it effectively can make a significant difference in a company's success. Elasticsearch is a distributed search and analytics engine designed for speed and scalability. It can process millions of queries per second and handle petabytes of data with ease. Kubernetes, on the other hand, is an open-source container orchestration system that automates application deployment, scaling, and management. Setting up the Environment Installing the Necessary Tools (kubectl, helm) Before deploying Elasticsearch on Kubernetes, ... Read More