Troubleshooting

Oracle Linux 8 — php:7.4 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — php:7.4 — vulnerability — patch and remediation guide (ELSA-2022-6542)

🟡 Medium   ⏱ 10–30 min  Last verified: 27 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-6542 Related CVEs: CVE-2020-36193 CVE-2020-28949 CVE-2020-28948 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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Arch Linux — openconnect — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — openconnect — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202005-11 Related CVEs: CVE-2020-12823 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 1:8.05-1. Fixed in: 1:8.10-1. Group: AVG-1157. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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How to Configure SELinux Boolean Settings on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure SELinux Boolean Settings on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying configure selinux boolean settings on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure SELinux Boolean Settings on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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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 119109

Ubuntu 14.04 LTS Kernel Panic After Generic Kernel Update

🟡 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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