January 2021 - Page 16 of 69

Доступ к фронтальной и задней камерам с помощью getUserMedia() в JavaScript — step-by-step Javascript tutorial on Progressive Robot

Доступ к фронтальной и задней камерам с помощью getUserMedia() в JavaScript

В языке HTML5 появились API для доступа к аппаратному обеспечению устройств, включая MediaDevices API. Этот API предоставляет доступ к устройствам ввода мультимедиа. в том числе аудио и видео. В этом учебном модуле вы узнаете, как получать доступ к видеопотокам с камер устройства пользователя.

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An Introduction to Networking Terminology, Interfaces, and Protocols — step-by-step Linux tutorial on Progressive Robot

An Introduction to Networking Terminology, Interfaces, and Protocols

A basic understanding of networking is important for anyone managing a server. Not only is it essential for getting your services online and running smoothly, it also gives you the insight to diagnose problems. This document will provide a basic overview of some common networking concepts. We will discuss basic terminology, common protocols, and the responsibilities and characteristics of the different layers of networking.

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Oracle Linux 8 — kernel — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel — security and stability fixes — required update (ELSA-2021-5227)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-5227 Related CVEs: CVE-2021-20321 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Common Problems 122104

Swap Exhaustion and Memory Pressure on Busy Hosts

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: FreeBSD 15 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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Arch Linux — telegram-desktop — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — telegram-desktop — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202107-45 Related CVEs: CVE-2021-36769 Upstream summary: Type: content spoofing. Status: Fixed. Affected: 2.8.4-3. Fixed in: 2.8.11-1. Group: AVG-2170. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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Common Problems 116015

systemd Service Fails at Boot

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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Compreendendo os ganchos de ciclo de vida do Vue.js — step-by-step Javascript tutorial on Progressive Robot

Compreendendo os ganchos de ciclo de vida do Vue.js

Ganchos de ciclo de vida são uma janela para ver como a biblioteca que você está usando funciona nos bastidores. Os ganchos de ciclo de vida permitem saber quando seu componente é criado, adicionado ao DOM, atualizado ou destruído. Este artigo irá apresentar-lhe os ganchos de criação, montagem, atualização e destruição.

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How to Configure HAProxy SSL Termination on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure HAProxy SSL Termination on Oracle Linux 8

Introduction How to Configure HAProxy SSL Termination on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration […]

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