Troubleshooting

Common Problems 112612

Windows Server 2019 – Password policy change blocked by domain functional level – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 2 November 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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How to Move a WPAR Between Systems on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Move a WPAR Between Systems on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to move a wpar between systems on ibm aix 7.1 […]

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How to Add and Delete Users on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Add and Delete Users on RHEL 7

How to Add and Delete Users on RHEL 7 User account management is one of the most fundamental administrative tasks on any Linux server. On Red Hat Enterprise Linux 7, the standard command-line tools — useradd, usermod, userdel, and passwd — give you precise control over every aspect of a user’s account: their login name, […]

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Oracle Linux 8 — openjpeg2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — openjpeg2 — vulnerability — patch and remediation guide (ELSA-2021-4251)

🟡 Medium   ⏱ 10–30 min  Last verified: 2 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4251 Related CVEs: CVE-2018-5727 CVE-2020-27823 CVE-2020-27814 CVE-2018-20845 CVE-2019-12973 CVE-2020-27824 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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

Oracle Linux 8 — sysstat — vulnerability — patch and remediation guide (ELSA-2020-4638)

🟢 Low   ⏱ 5–15 min  Last verified: 2 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4638 Related CVEs: CVE-2019-16167 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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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-2023-5742)

🟡 Medium   ⏱ 10–30 min  Last verified: 1 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-5742 Related CVEs: CVE-2023-22081 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 Grafana Loki on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Grafana Loki on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure Grafana Loki on Oracle Linux 8 on Oracle Linux 8. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 8 system with the default […]

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How to Use cron and at Scheduling on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use cron and at Scheduling on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use cron and at scheduling on ibm aix 7.1 […]

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FreeBSD 12 — chocolate-doom — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — chocolate-doom — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 November 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: chocolate-doom — Arbitrary code execution Related CVEs: CVE-2020-14983 Upstream summary: Michal Dardas from LogicalTrust reports: The server in Chocolate Doom 3.0.0 and Crispy Doom 5.8.0 doesn't validate the user-controlled num_players […]

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How to Set Up Horizontal Pod Autoscaling in Kubernetes on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up Horizontal Pod Autoscaling in Kubernetes on Debian 9

Introduction Deploying set up horizontal pod autoscaling in kubernetes 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. […]

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