chris

Common Problems 124169

Oracle Linux 10 – nftables direct rule conflicts with firewalld runtime state

🟠 High   ⏱ 5–30 min  Last verified: 12 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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FreeBSD 12 — linux-c7-libxslt — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — linux-c7-libxslt — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 12 November 2025 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: libxslt — multiple vulnerabilities Related CVEs: CVE-2025-11731 CVE-2025-7424 CVE-2025-7425 CVE-2025-9714 Upstream summary: Alan Coopersmith reports: On 6/16/25 15:12, Alan Coopersmith wrote: BTW, users of libxml2 may also be using its […]

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How to Configure LVM on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure LVM on SLES 16

Introduction This tutorial covers How to Configure LVM 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. Step 1 — Install LVM zypper install -y lvm2 Step 2 — Create […]

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How to Use snapper for Snapshot Management on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Use snapper for Snapshot Management on RHEL 10

Introduction How to Use snapper for Snapshot Management on RHEL 10 on RHEL 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 configuration is […]

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Common Problems 119622

Debian 13 – Certbot Renewal Fails and TLS Certificates Expire – Remediation

🔴 Critical   ⏱ 5–30 min  Last verified: 12 November 2025 Affected versions: Debian 13 (Trixie) 📖 ~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 Port Knocking on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Set Up Port Knocking on SLES 16

Introduction This tutorial covers How to Set Up Port Knocking 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 […]

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How to Configure TeamCity Build Agent on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure TeamCity Build Agent on SLES 16

Introduction This tutorial covers How to Configure TeamCity Build Agent 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 […]

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Debian 13 — vim-syntastic — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — vim-syntastic — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 12 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-11319 Upstream summary: Syntastic (aka vim-syntastic) through 3.9.0 does not properly handle searches for configuration files (it searches the current directory up to potentially the root). This improper handling […]

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Common Problems 119482

Debian 13 – Network Interface Rename Breaks Connectivity – Persistent Mapping Fix

🟠 High   ⏱ 5–30 min  Last verified: 12 November 2025 Affected versions: Debian 13 (Trixie) 📖 ~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 Consul on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Set Up Consul on SLES 16

Introduction This tutorial covers How to Set Up Consul 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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