chris

How to Configure AppArmor in Complain Mode on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure AppArmor in Complain Mode on SLES 16

Introduction This tutorial covers How to Configure AppArmor in Complain Mode 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 — Check AppArmor Status systemctl status apparmor aa-status […]

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Debian 12 — kf5-messagelib — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — kf5-messagelib — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 November 2025 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-17689 CVE-2017-9604 CVE-2018-19516 CVE-2019-10732 CVE-2021-31855 CVE-2025-69412 Upstream summary: The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. […]

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Debian 13 — zchunk — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — zchunk — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-46228 Upstream summary: zchunk before 1.3.2 has multiple integer overflows via malformed zchunk files to lib/comp/comp.c, lib/comp/zstd/zstd.c, lib/dl/multipart.c, or lib/header.c. Table of contents Symptom & Impact Environment & Reproduction […]

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How to Install OpenShift CLI on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Install OpenShift CLI on SLES 16

Introduction This tutorial covers How to Install OpenShift CLI 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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Debian 13 — libdata-uuid-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libdata-uuid-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-4184 Upstream summary: Perl module Data::UUID from CPAN version 1.219 vulnerable to symlink attacks Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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Rocky Linux 8 — perl-Pod-Perldoc — vulnerability — patch and remediation guide — diagnosis and fix on Rocky Linux 8

Rocky Linux 8 — perl-Pod-Perldoc — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 8 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2026:8096 Related CVEs: CVE-2025-40909 Upstream summary: Perl is a high-level programming language that is commonly used for system administration utilities and web programming. Security Fix(es): * perl: Perl threads have […]

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How to Configure Nginx Load Balancing (Round-Robin, Least Conn) on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Nginx Load Balancing (Round-Robin, Least Conn) on RHEL 9

Load balancing distributes incoming requests across multiple backend servers, preventing any single server from becoming a bottleneck and providing horizontal scalability and fault tolerance. Nginx supports four load balancing methods natively: round-robin (the default), least connections, IP hash (session persistence), and weight-based. The upstream block defines the pool of backend servers and their weights, and […]

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How to Install CodeIgniter on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Install CodeIgniter on SLES 16

Introduction This tutorial covers How to Install CodeIgniter 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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Debian 13 — dxflib — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — dxflib — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-21897 Upstream summary: A code execution vulnerability exists in the DL_Dxf::handleLWPolylineData functionality of Ribbonsoft dxflib 3.17.0. A specially-crafted .dxf file can lead to a heap buffer overflow. An attacker […]

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