Linux

openSUSE Leap 15.5 — ruby2.5 — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.5

openSUSE Leap 15.5 — ruby2.5 — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.5 📖 ~4 min read  •  Source: SUSE advisory RHSA-2024:6670 (see also SUSE bugzilla) Related CVEs: CVE-2024-43398 CVE-2021-33621 CVE-2024-41123 CVE-2024-41946 CVE-2024-39908 CVE-2024-35176 CVE-2021-41817 CVE-2023-28755  +1 more Upstream summary: REXML is an XML toolkit for Ruby. The REXML gem before 3.3.6 […]

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Oracle Linux 9 — poppler — security and stability fixes — required update — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — poppler — security and stability fixes — required update (ELSA-2023-2259)

🟡 Medium   ⏱ 10–30 min  Last verified: 8 January 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-2259 Related CVEs: CVE-2022-38784 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 127188

CentOS Stream 10 – Common Problem 173 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 8 January 2025 Affected versions: CentOS Stream 10 📖 ~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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Common Problems 120128

Debian 12: OOM kills Java service under load

🔴 Critical   ⏱ 5–30 min  Last verified: 8 January 2025 Affected versions: Debian 12 📖 ~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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How to Set Up MySQL with SSL on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Set Up MySQL with SSL on CentOS Stream 10

Introduction How to Set Up MySQL with SSL on CentOS Stream 10 on CentOS Stream 10 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 […]

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Common Problems 116991

Ubuntu 22.04 LTS – sudo fails with unable to resolve host after hostname change – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 January 2025 Affected versions: Ubuntu 22.04 LTS 📖 ~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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Common Problems 116576

Ubuntu 24.04 LTS – Locale misconfiguration causes Unicode errors – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 January 2025 Affected versions: Ubuntu 24.04 LTS 📖 ~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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Common Problems 116526

Ubuntu 24.04 LTS – systemd journal grows too large – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 January 2025 Affected versions: Ubuntu 24.04 LTS 📖 ~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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How to Configure DNS Resolution on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Configure DNS Resolution on CentOS Stream 10

Introduction CentOS Stream 10 ships with a stable, security-hardened base that makes deploying configure dns resolution on centos stream 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure DNS Resolution on CentOS Stream 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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How to Install and Configure Xdebug 3 for PHP 8.3 on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Install PHP 8.3 on Ubuntu 24.04

PHP 8.3 brings performance improvements, typed class constants, the json_validate() function, and various engine enhancements over PHP 8.2. This guide installs PHP 8.3 on Ubuntu 24.04 LTS using the Ondrej PPA — the most up-to-date source for PHP on Ubuntu. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with […]

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