Troubleshooting

openSUSE Tumbleweed — ksh — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — ksh — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2024:2756-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-14868 Upstream summary: In ksh version 20120801, a flaw was found in the way it evaluates certain environment variables. An attacker could use this flaw […]

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How to Use tmux for Terminal Multiplexing on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Use tmux for Terminal Multiplexing on RHEL 7

How to Use tmux for Terminal Multiplexing on RHEL 7 Every Linux administrator has experienced the frustration of losing a long-running process because an SSH connection dropped. tmux (terminal multiplexer) solves this problem by running your terminal sessions inside a persistent server process that survives disconnections. Beyond persistence, tmux allows you to split a single […]

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Common Problems 114916

RHEL 8 firewalld Zone Mismatch Blocks Application Port

🟡 Medium   ⏱ 5–30 min  Last verified: 9 November 2019 📖 ~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 & Cross-Refs References & Further […]

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How to Install PostgreSQL on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Install PostgreSQL on SLES 15

Introduction This tutorial covers How to Install PostgreSQL on SLES 15 on SLES 15. SLES 15 (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 PostgreSQL zypper install -y postgresql-server postgresql Step 2 — […]

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FreeBSD 12 — poppler — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — poppler — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: poppler — multiple denial of service issues Related CVEs: CVE-2007-3387 CVE-2007-4352 CVE-2007-5392 CVE-2007-5393 CVE-2008-2950 CVE-2017-9775 CVE-2017-9865 Upstream summary: Poppler developers report: Poppler is prone to a stack-based buffer-overflow vulnerability. Successful […]

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Common Problems 113591

Windows Server 2012 R2 — Cluster Service (ClusSvc) quorum startup failure — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 November 2019 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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FreeBSD 12 — php4-shmop — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — php4-shmop — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: php — multiple vulnerabilities Related CVEs: CVE-2007-0905 CVE-2007-0906 CVE-2007-0907 CVE-2007-0908 CVE-2007-0909 CVE-2007-0910 CVE-2007-0988 CVE-2007-1001 Upstream summary: The PHP development team reports: Security Enhancements and Fixes in PHP 5.2.2 and PHP […]

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Common Problems 112571

Windows Server 2019 – Storage Replica asynchronous RPO spikes during backup windows – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 9 November 2019 Affected versions: Windows Server 2019 📖 ~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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Alpine Linux edge — freeimage — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — freeimage — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 3.18.0-r2 📖 ~4 min read  •  Source: Alpine secdb entry — freeimage 3.18.0-r2 Related CVEs: CVE-2019-12211 CVE-2019-12213 Upstream summary: Alpine community repository for vedge ships freeimage 3.18.0-r2 which addresses CVE-2019-12211. Table of contents Symptom & Impact […]

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FreeBSD 12 — pjsip-extsrtp — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — pjsip-extsrtp — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 9 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: asterisk and pjsip — multiple vulnerabilities Upstream summary: The Asterisk project reports: AST-2018-002 – By crafting an SDP message with an invalid media format description Asterisk crashes when using the […]

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