Security Hardening

How to Tune System Performance with tuned on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Tune System Performance with tuned on SLES 16

Introduction This tutorial covers How to Tune System Performance with tuned on SLES 16 on SLES 16. SLES 16 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 16 system is up to date: […]

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SLES 16 — libgtk — vulnerability — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — libgtk — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 6 November 2025 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory RHSA-2024:6963 (see also SUSE bugzilla) Related CVEs: CVE-2024-6655 Upstream summary: A flaw was found in the GTK library. Under certain conditions, it is possible for a library to be injected into a […]

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Common Problems 123964

DNF Metadata Download Fails Behind Corporate Proxy

🟠 High   ⏱ 5–30 min  Last verified: 6 November 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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Oracle Linux 9 — transfig — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — transfig — vulnerability — patch and remediation guide (ELSA-2026-0700)

🟡 Medium   ⏱ 10–30 min  Last verified: 6 November 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-0700 Related CVEs: CVE-2025-46397 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 116546

Ubuntu 24.04 LTS – Wi-Fi adapter not detected after kernel update – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 6 November 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 Monitor System Resources on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Monitor System Resources on SLES 16

Introduction This tutorial covers How to Monitor System Resources on SLES 16 on SLES 16. SLES 16 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 16 system is up to date: zypper refresh […]

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How to Install Nginx on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Nginx on RHEL 9

Nginx (pronounced “engine-x”) is the most widely deployed web server in the world, powering everything from small personal websites to the largest content delivery networks. On RHEL 9, Nginx is available from the AppStream repository and integrates natively with SELinux, firewalld, and systemd. Its event-driven, non-blocking architecture means a single Nginx worker process can handle […]

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SLES 15 — pam — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — pam — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 6 November 2025 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory RHSA-2025:10027 (see also SUSE bugzilla) Related CVEs: CVE-2025-6020 CVE-2024-10041 CVE-2024-22365 CVE-2010-3430 CVE-2010-3431 CVE-2010-3853 CVE-2011-3148 CVE-2014-2583  +3 more Upstream summary: A flaw was found in linux-pam. The module pam_namespace may use access user-controlled […]

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How to Install Ruby with rbenv on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Ruby with rbenv on Oracle Linux 10

Introduction This tutorial demonstrates how to Install Ruby with rbenv on Oracle Linux 10 on Oracle Linux 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 Oracle Linux 10 system with the […]

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Rocky Linux 8 — crun — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Rocky Linux 8

Rocky Linux 8 — crun — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 8 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2026:4672 Related CVEs: CVE-2025-61726 CVE-2025-61728 CVE-2025-68121 CVE-2024-24785 CVE-2025-61729 CVE-2025-65637 CVE-2025-47913 CVE-2025-52881  +12 more Upstream summary: The container-tools module contains tools for working with containers, notably podman, buildah, skopeo, and runc. […]

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