Linux

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2025-20609)

• July 26, 2025
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 26 July 2025 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-20609 Related CVEs: CVE-2025-38494 CVE-2025-38499 CVE-2025-38495 CVE-2025-38264 CVE-2025-38618 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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How to Install MariaDB 10.11 on Ubuntu 24.04

• July 26, 2025
• Linux
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MariaDB 10.11 LTS is a community-developed fork of MySQL with enhanced performance, more storage engines, and longer support windows. Ubuntu 24.04 LTS ships MariaDB 10.11 in its repositories. This guide installs and configures it. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges Step 1 – Install […]

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Oracle Linux 10 — xorg-x11-server-Xwayland — vulnerability — patch and remediation guide (ELSA-2025-7458)

• July 26, 2025
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 26 July 2025 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-7458 Related CVEs: CVE-2025-26594 CVE-2025-26599 CVE-2025-26596 CVE-2025-26601 CVE-2025-26595 CVE-2025-26600 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How to Configure Apache Virtual Hosts on Ubuntu 24.04

• July 26, 2025
• Linux
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Apache virtual hosts allow you to host multiple websites on one server. This guide creates a virtual host configuration for a custom domain on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server Apache installed A domain name pointed to your server’s IP Step 1 – Create the Document […]

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openSUSE Leap 15.6 — python3-setuptools — multiple vulnerabilities (2 CVEs) — patch and remediation guide

• July 26, 2025
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory RHSA-2025:10407 (see also SUSE bugzilla) Related CVEs: CVE-2025-47273 CVE-2024-6345 Upstream summary: setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python packages. A path traversal vulnerability […]

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How to Configure NTP Server with chrony on RHEL 10

• July 25, 2025
• Linux
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Introduction This tutorial demonstrates how to Configure NTP Server with chrony on RHEL 10 on RHEL 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered RHEL 10 system with the default AppStream […]

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CentOS Stream 10 – Common Problem 227 – Diagnosis and Fix

• July 25, 2025
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 25 July 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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RHEL 10 Postfix Cannot Send Outbound Mail Due to DNS and Firewall Issues

• July 25, 2025
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 25 July 2025 Affected versions: RHEL 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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How to Set Up CentOS Stream 10 for High-Performance Computing

• July 25, 2025
• CentOS
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Introduction This tutorial demonstrates how to Set Up CentOS Stream 10 for High-Performance Computing on CentOS Stream 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 10 system with the […]

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Oracle Linux 10 journald Disk Usage Grows Unbounded

• July 25, 2025
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 25 July 2025 Affected versions: Oracle Linux 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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