Logging Monitoring

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

Oracle Linux 8 — openwsman — vulnerability — patch and remediation guide (ELSA-2019-0972)

🟠 High   ⏱ 15–60 min  Last verified: 27 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-0972 Related CVEs: CVE-2019-3816 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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Arch Linux — opensmtpd — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — opensmtpd — multiple vulnerabilities (4 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-202002-13 Related CVEs: CVE-2020-8794 CVE-2020-7247 CVE-2020-35680 CVE-2020-35679 Upstream summary: Type: arbitrary command execution. Status: Fixed. Affected: 6.6.3p1-1. Fixed in: 6.6.4p1-1. Group: AVG-1105. Table of contents Symptom & Impact Environment & […]

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How to Migrate Active Directory from Windows Server 2008 R2 to 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Migrate Active Directory from Windows Server 2008 R2 to 2012 R2

How to Migrate Active Directory from Windows Server 2008 R2 to 2012 R2 Migrating an Active Directory environment from Windows Server 2008 R2 to Windows Server 2012 R2 is a multi-phase process that involves introducing new Domain Controllers, transferring FSMO roles, raising functional levels, and decommissioning old servers. Done correctly, the migration is non-disruptive — […]

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IBM AIX 7.2 — CVE-2020-4771 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2020-4771 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 26 December 2020 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2020-4771, IBM Support Bulletin CVE: CVE-2020-4771 NVD summary: IBM Spectrum Protect Operations Center 8.1.0.000 through 8.1.10.and 7.1.0.000 through 7.1.11 could allow a remote attacker to obtain sensitive information, caused by improper authentication […]

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Oracle Linux 8 — .NET 5.0 security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — .NET 5.0 security and bugfix update (ELSA-2022-0495)

🟠 High   ⏱ 15–60 min  Last verified: 26 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-0495 Related CVEs: CVE-2022-21986 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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Common Problems 121628

Ext4 Filesystem Remounted Read-Only After I/O Errors

🔴 Critical   ⏱ 5–30 min  Last verified: 26 December 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 117552

Ubuntu 20.04 LTS LVM Volume Not Extending After Disk Resize

🟡 Medium   ⏱ 5–30 min  Last verified: 26 December 2020 Affected versions: 20.04 LTS 📖 ~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 Configure SELinux Policies on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure SELinux Policies on Oracle Linux 8

Introduction Setting up configure selinux policies on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure SELinux Policies on Oracle Linux 8, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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Common Problems 115074

tuned Profile Not Applied After Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 26 December 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 115043

RHEL 8 dnf-makecache timer spikes CPU and disk unexpectedly

🟡 Medium   ⏱ 5–30 min  Last verified: 26 December 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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