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How to Install Kubernetes with kubeadm on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Kubernetes with kubeadm on RHEL 9

Kubernetes is the industry-standard container orchestration platform for automating deployment, scaling, and management of containerised applications across clusters of servers. While Kubernetes is typically set up using managed services (EKS, GKE, AKS) in cloud environments, installing it with kubeadm on bare-metal or on-premises servers provides full control over the cluster configuration. kubeadm is the official […]

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Установка веб-сервера Apache в CentOS 8. [Краткое руководство.] — step-by-step Linux tutorial on Progressive Robot

Установка веб-сервера Apache в CentOS 8. [Краткое руководство.]

HTTP-сервер Apache — самый широко используемый веб-сервер в мире. Он имеет множество мощных функций, включая динамически загружаемые модули, надежную поддержку различных медиаформатов и интеграцию с другим популярным программным обеспечением. С…

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How to Configure Storage Spaces on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Storage Spaces on Windows Server 2019

How to Configure Storage Spaces on Windows Server 2019 Storage Spaces is a software-defined storage (SDS) feature in Windows Server 2019 that allows administrators to pool physical disks from multiple drives or enclosures and create virtual disks with resiliency (mirroring, parity) and thin provisioning. Storage Spaces abstracts the underlying hardware, enabling commodity disks to provide […]

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How to Install Linux Socket Monitor (LSM) on CentOS 6.4 — step-by-step Linux tutorial on Progressive Robot

How to Install Linux Socket Monitor (LSM) on CentOS 6.4

In this article we will be looking at enhancing system security by increasing the level of monitoring performed. We are going to set up Linux Socket Monitor (LSM) which sends out alerts when a new socket / port is created, which is a potential signal of an intrusion by an unknown application taking over its host.

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Debian 11 — kdepim-runtime — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — kdepim-runtime — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-15954 Upstream summary: KDE KMail 19.12.3 (aka 5.13.3) engages in unencrypted POP3 communication during times when the UI indicates that encryption is in use. Table of contents Symptom […]

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How to Install and Secure the Mosquitto MQTT Messaging Broker on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How to Install and Secure the Mosquitto MQTT Messaging Broker on Ubuntu 16.04

MQTT is a machine-to-machine messaging protocol, designed to provide lightweight publish/subscribe communication to “Internet of Things” devices. Mosquitto is a popular MQTT server (or broker, in MQTT parlance) that has great community support and is easy to install and configure. In this tutorial, we’ll install Mosquitto, retrieve SSL certificates from Let’s Encrypt, and set up our broker to use SSL to secure our password-protected MQTT communications.

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OpenBSD 7.4 — xserver — errata 012_xserver — multiple vulnerabilities (6 CVEs) — syspatch and remediation — diagnosis and fix on OpenBSD 7.4

OpenBSD 7.4 — xserver — errata 012_xserver — multiple vulnerabilities (6 CVEs) — syspatch and remediation

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 012_xserver Errata topic: Security: xserver (All architectures) Issued: January 16, 2024 Related CVEs: CVE-2023-6816 CVE-2024-0229 CVE-2024-0408 CVE-2024-0409 CVE-2024-21885 CVE-2024-21886 Upstream summary: Fix multiple xserver heap buffer overflows, out of bounds memory […]

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Создание приложения Node.js с помощью Docker — step-by-step Docker tutorial on Progressive Robot

Создание приложения Node.js с помощью Docker

Платформа Docker позволяет разработчикам упаковывать и запускать приложения как контейнеры. Контейнер — это изолированный процесс, выполняемый в общей операционной системе, и представляющий из себя облегченную альтернативу виртуальным машинам. Хотя…

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Breadth-First Search (BFS) and Depth-First Search (DFS) for Binary Trees in Java — step-by-step Programming tutorial on Progressive Robot

Breadth-First Search (BFS) and Depth-First Search (DFS) for Binary Trees in Java

Breadth-First Search and Depth-First Search are two techniques of traversing graphs and trees. In this tutorial, we will focus mainly on BFS and DFS traversals in trees. What is Depth First Search (DFS)? The algorithm begins at the root node and then it explores each branch before [backtracking](/community/tutorials/n-queens-problem-java-c-plus-plus). It is implemented using stacks. Often while […]

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