April 2021 - Page 31 of 66

How to Configure Nginx with PageSpeed Module on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Nginx with PageSpeed Module on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying configure nginx with pagespeed module on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Nginx with PageSpeed Module on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the […]

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How To Install Matrix Synapse on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install Matrix Synapse on Ubuntu 16.04

Matrix is an open standard for decentralized communication. Matrix uses homeservers to store your account information and chat history. By following this guide you will install Synapse, the reference homeserver implementation of Matrix. When you’re finished, you will be able to connect to your homeserver via any Matrix client and communicate with others users across other Matrix federated homeservers.

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FreeBSD 12 — rubygem-rexml — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — rubygem-rexml — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ruby — XML round-trip vulnerability in REXML Related CVEs: CVE-2021-28965 Upstream summary: Juho Nurminen reports: When parsing and serializing a crafted XML document, REXML gem (including the one bundled with […]

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Oracle Linux 8 — wavpack — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — wavpack — vulnerability — patch and remediation guide (ELSA-2022-7558)

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7558 Related CVEs: CVE-2021-44269 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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Debian 10 — tor — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — tor — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-10592 CVE-2021-28089 CVE-2021-34548 CVE-2021-38385 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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Covariance and Correlation in R programming — step-by-step DevOps tutorial on Progressive Robot

Covariance and Correlation in R programming

Hello readers! In this article, we would be focusing on two important parameters of statistics — Covariance and Correlation in R programming, in detail. So, let us begin!! Covariance in R programming In Statistics, Covariance is the measure of the relation between two variables of a dataset. That is, it depicts the way two variables […]

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Unraveling the OpenAPI Specification (OAS)

Unraveling the OpenAPI Specification (OAS): Defining RESTful APIs with Precision

In the dynamic world of web development, the OpenAPI Specification (OAS) has emerged as a powerful standard for defining RESTful APIs. Widely adopted for its clarity and flexibility, the specification has become a cornerstone for developers aiming to create robust and interoperable APIs. This article explores the intricacies of the OpenAPI Specification, delving into best practices for writing comprehensive documentation and the array of tools that support and enhance the specification’s capabilities.

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AlmaLinux 8 — jolokia-jvm-agent — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — jolokia-jvm-agent — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2020:1718 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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AlmaLinux 8 — xdg-desktop-portal-gtk — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — xdg-desktop-portal-gtk — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2020:4451 Related CVEs: CVE-2019-8625 CVE-2019-8710 CVE-2019-8720 CVE-2019-8743 CVE-2019-8764 CVE-2019-8766 CVE-2019-8769 CVE-2019-8771  +12 more Upstream summary: GNOME is the default desktop environment of AlmaLinux. The following packages have been upgraded to a later […]

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