Troubleshooting

Ubuntu 16.04 — librabbitmq — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — librabbitmq — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 February 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4214-2 Related CVEs: CVE-2019-18609 Upstream summary: USN-4214-1 fixed a vulnerability in RabbitMQ. This update provides the corresponding updates for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Original advisory details: It […]

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openSUSE Tumbleweed — python-pyOpenSSL — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python-pyOpenSSL — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-FU-2022:0444-1 (see also SUSE bugzilla) Related CVEs: CVE-2013-4314 Upstream summary: The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a '' character in a domain name in the Subject Alternative Name […]

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Ubuntu 16.04 — elfutils — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — elfutils — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 14 February 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6322-1 Related CVEs: CVE-2018-16062 CVE-2018-16403 CVE-2018-18310 CVE-2018-18520 CVE-2018-18521 CVE-2019-7149 CVE-2019-7150 CVE-2019-7665  +12 more Upstream summary: It was discovered that elfutils incorrectly handled certain malformed files. If a user or automated […]

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How to Install PHP 7.0 with PHP-FPM on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install PHP 7.0 with PHP-FPM on Debian 9

Introduction Deploying install php 7.0 with php-fpm on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure […]

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Oracle Linux 8 — libwebp — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — libwebp — vulnerability — patch and remediation guide (ELSA-2021-2354)

🟠 High   ⏱ 15–60 min  Last verified: 14 February 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-2354 Related CVEs: CVE-2018-25011 CVE-2020-36328 CVE-2020-36329 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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How to Configure GPG Key Management on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure GPG Key Management on Debian 10

Introduction How to Configure GPG Key Management on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. […]

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Common Problems 115427

systemctl Shows Service Failed After Package Upgrade

🟡 Medium   ⏱ 5–30 min  Last verified: 13 February 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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Common Problems 113131

Windows Server 2016 — Patch Compliance Drift Caused by Disabled UsoSvc and WaaSMedic — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 February 2020 Affected versions: Windows Server 2016 📖 ~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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openSUSE Tumbleweed — libXt6 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libXt6 — 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-2013:1101-1 (see also SUSE bugzilla) Related CVEs: CVE-2013-2002 CVE-2013-2005 Upstream summary: Buffer overflow in X.org libXt 1.1.3 and earlier allows X servers to cause a denial of service (crash) and possibly execute […]

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How to Mount CIFS Windows Shares on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Mount CIFS Windows Shares on Debian 10

Introduction How to Mount CIFS Windows Shares on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. […]

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