Troubleshooting

How to Set Up Consul on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Set Up Consul on SLES 15

Introduction This tutorial covers How to Set Up Consul 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. Prerequisites Ensure your SLES 15 system is up to date: zypper refresh […]

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Ubuntu 14.04 — software-properties — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — software-properties — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 January 2020 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4457-2 Related CVEs: CVE-2020-15709 Upstream summary: USN-4457-1 fixed a vulnerability in Software. This update provides the corresponding update for Ubuntu 14.04 ESM. Original advisory details: Jason A. Donenfeld discovered that […]

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Common Problems 113114

Windows Server 2016 — OU permissions inheritance blocked: delegated admins cannot manage child OUs — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 26 January 2020 Affected versions: Windows Server 2016 📖 ~2 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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How to Configure DISA STIG for AIX on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure DISA STIG for AIX 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 disa stig for aix on ibm aix 7.2 […]

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How to Install PHP 8.2 on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install PHP 8.2 on FreeBSD 12

Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install php 8.2 on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. […]

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Ubuntu 18.04 — libmodbus — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libmodbus — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 January 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5173-1 Related CVEs: CVE-2019-14462 CVE-2019-14463 Upstream summary: It was discovered that libmodbus incorrectly handled inputs. An attacker could possibly use this issue to cause a denial of service or other […]

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How to Create and Manage LPARs on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Create and Manage LPARs 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 create and manage lpars on ibm aix 7.2 on […]

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Oracle Linux 8 — gcc-toolset-14-gcc — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — gcc-toolset-14-gcc — vulnerability — patch and remediation guide (ELSA-2025-1338)

🟡 Medium   ⏱ 10–30 min  Last verified: 26 January 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-1338 Related CVEs: CVE-2020-11023 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Configure Cross-Forest Trusts in Active Directory on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Cross-Forest Trusts in Active Directory on Windows Server 2016

Introduction Cross-forest trusts in Active Directory on Windows Server 2016 allow users in one AD forest to access resources in a completely separate forest, without merging the two domains. This is essential for mergers and acquisitions, partner organisation access, and multi-forest enterprise architectures. A two-way forest trust grants mutual access, while a one-way trust restricts […]

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How to Configure OpenVPN Server on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure OpenVPN Server on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up configure openvpn server on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and the […]

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