Troubleshooting

Gentoo Linux — sys-fs/f2fs-tools — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — sys-fs/f2fs-tools — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202101-26 Related CVEs: CVE-2020-6104 CVE-2020-6105 CVE-2020-6106 CVE-2020-6107 CVE-2020-6108 Upstream summary: Multiple vulnerabilities have been discovered in f2fs-tools. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact […]

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How to Configure MySQL InnoDB Cluster on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure MySQL InnoDB Cluster on Oracle Linux 8

Introduction How to Configure MySQL InnoDB Cluster on Oracle Linux 8 on Oracle Linux 8 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 […]

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How to Configure AIX Audit Events on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure AIX Audit Events on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure aix audit events on ibm aix 7.2 on […]

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How to Install InfluxDB on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install InfluxDB on FreeBSD 12

Introduction How to Install InfluxDB on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet filtering, and […]

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Arch Linux — vlc — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — vlc — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201906-22 Related CVEs: CVE-2019-5439 CVE-2019-12874 CVE-2017-9300 CVE-2017-10699 CVE-2017-8312 CVE-2017-8311 CVE-2017-8310 CVE-2020-26664 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 3.0.6-13. Fixed in: 3.0.7.1-1. Group: AVG-998. Table of contents Symptom […]

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How to Configure Network Controller with SDN on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Network Controller with SDN on Windows Server 2016

How to Set Up Windows Server 2016 Network Controller Network Controller is a software-defined networking (SDN) management component introduced in Windows Server 2016 Datacenter edition. It provides a centralized, programmable point of automation for configuring, monitoring, and troubleshooting virtual and physical network infrastructure in a datacenter. Network Controller communicates with network devices using southbound APIs […]

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Common Problems 118624

Ubuntu 16.04 LTS UFW blocks expected traffic after rule changes

🟡 Medium   ⏱ 5–30 min  Last verified: 2 January 2021 📖 ~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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Oracle Linux 8 — java-11-openjdk — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-11-openjdk — security and stability fixes — required update (ELSA-2022-7012)

🟡 Medium   ⏱ 10–30 min  Last verified: 2 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7012 Related CVEs: CVE-2022-39399 CVE-2022-21624 CVE-2022-21626 CVE-2022-21618 CVE-2022-21619 CVE-2022-21628 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 118124

Ubuntu 18.04 LTS – NFS mount hangs and causes boot timeout

🟠 High   ⏱ 5–30 min  Last verified: 2 January 2021 Affected versions: Ubuntu 18.04 LTS Ubuntu 18.04 Ubuntu 18.04.6 📖 ~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 […]

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