Logging Monitoring

Common Problems 121488

SSH Access Denied After Security Hardening Changes

🔴 Critical   ⏱ 5–30 min  Last verified: 28 March 2020 Affected versions: Debian 9 📖 ~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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Common Problems 115528

RHEL 7 service mariadb Starts then Immediately Stops

🟡 Medium   ⏱ 5–30 min  Last verified: 28 March 2020 📖 ~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 Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install PostgreSQL on Debian 9

Introduction This guide explains how to Install PostgreSQL on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install with the standard repositories […]

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openSUSE Tumbleweed — libical3 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libical3 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2017:1989-1 (see also SUSE bugzilla) Related CVEs: CVE-2016-5827 CVE-2016-9584 Upstream summary: The icaltime_from_string function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) via […]

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Common Problems 112436

Windows Server 2019 — SQL Server service won’t start after disk path change — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 28 March 2020 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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FreeBSD 12 — dbus-glib — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — dbus-glib — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 28 March 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: dbus-glib — privledge escalation Related CVEs: CVE-2013-0292 Upstream summary: Sebastian Krahmer reports: A privilege escalation flaw was found in the way dbus-glib, the D-Bus add-on library to integrate the standard […]

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How to Install Cockpit Web Console on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install Cockpit Web Console on Debian 10

Introduction This guide explains how to Install Cockpit Web Console on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the […]

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Amazon Linux 2 — mysql-connector-java — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — mysql-connector-java — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-2017 Related CVEs: CVE-2020-2934 Upstream summary: Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/J). Supported versions that are affected are 8.0.19 and prior and 5.1.48 and prior. […]

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Arch Linux — ruby-rdoc — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — ruby-rdoc — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201910-4 Related CVEs: CVE-2015-9251 CVE-2012-6708 Upstream summary: Type: cross-site scripting. Status: Fixed. Affected: 6.1.1-1. Fixed in: 6.1.2-1. Group: AVG-1041. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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FreeBSD 12 — nsd — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — nsd — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 28 March 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Unbound/NSD — Denial of service vulnerability Related CVEs: CVE-2009-1755 CVE-2012-2978 CVE-2012-2979 CVE-2016-6170 CVE-2016-6171 CVE-2016-6172 CVE-2016-6173 CVE-2019-13207  +1 more Upstream summary: NLNetLabs reports: Unbound and NSD when writing the PID file […]

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