February 2022 - Page 47 of 65

How To Install and Use Docker on Rocky Linux 8 — step-by-step Docker tutorial on Progressive Robot

How To Install and Use Docker on Rocky Linux 8

Docker is an application that simplifies the process of managing application processes in containers. In this tutorial, you’ll install and use Docker Community Edition (CE) on Rocky Linux 8. You’ll install Docker itself, work with containers and images, and push an image to a Docker Repository.

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Ubuntu 16.04 — scilab — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — scilab — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5061-1 Related CVEs: CVE-2021-30485 CVE-2021-31229 CVE-2021-31347 CVE-2021-31598 Upstream summary: It was discovered that Scilab did not properly sanitize XML inputs. An atacker could use a crafted XML file to cause […]

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How to Configure MySQL Group Replication on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure MySQL Group Replication on RHEL 8

MySQL Group Replication extends traditional replication with built-in automatic failover and a distributed consensus protocol, making it suitable for high-availability deployments without requiring additional orchestration tools. In single-primary mode, one node accepts writes at a time while all nodes serve reads, and the group automatically elects a new primary if the current one fails. This […]

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JavaScriptの getUserMedia() を使用してフロントカメラとリアカメラにアクセスする方法 — step-by-step Javascript tutorial on Progressive Robot

JavaScriptの getUserMedia() を使用してフロントカメラとリアカメラにアクセスする方法

HTML5 では、MediaDevices API など、デバイスハードウェアにアクセスできる API を導入しています。この API により、オーディオやビデオなどのメディア入力デバイスへのアクセスができます。このチュートリアルでは、ユーザーのデバイスに搭載されたカメラからビデオフィードにアクセスする方法を説明します。

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AlmaLinux 8 — gegl04 — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — gegl04 — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2022:0177 Related CVEs: CVE-2021-45463 Upstream summary: GEGL (Generic Graphics Library) is a graph-based image processing framework. Security Fix(es): * gegl: shell expansion via a crafted pathname (CVE-2021-45463) For more details about the […]

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

Oracle Linux 8 — samba — security and stability fixes — required update (ELSA-2022-7111)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7111 Related CVEs: CVE-2022-32742 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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Gentoo Linux — net-im/telegram-desktop — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-im/telegram-desktop — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202105-07 Related CVEs: CVE-2021-27351 CVE-2020-17448 CVE-2020-25824 Upstream summary: It was discovered that Telegram failed to invalidate a recently active session. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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Amazon Linux 2 — xterm — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — xterm — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2021-1619 Related CVEs: CVE-2021-27135 Upstream summary: A flaw was found in xterm. A specially crafted sequence of combining characters causes an out of bounds write leading to arbitrary code execution. […]

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Common Problems 121634

Debian 9 – ext4 filesystem remounts read-only after I/O errors

🔴 Critical   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: Debian 9 📖 ~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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CHAT