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Arch Linux — libslirp — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — libslirp — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202106-49 Related CVEs: CVE-2021-3595 CVE-2021-3594 CVE-2021-3593 CVE-2021-3592 CVE-2020-29130 CVE-2020-29129 Upstream summary: Type: information disclosure. Status: Fixed. Affected: 4.5.0-1. Fixed in: 4.6.0-1. Group: AVG-2073. Table of contents Symptom & Impact Environment […]

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How to Configure Cross-Forest Trusts in Active Directory on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Cross-Forest Trusts in Active Directory on Windows Server 2012 R2

How to Configure Cross-Forest Trusts in Active Directory on Windows Server 2012 R2 Cross-forest trusts enable users in one Active Directory forest to access resources in another forest, enabling collaboration between organizations, supporting merger and acquisition scenarios, and allowing resource sharing between separate business units with independent IT governance. Windows Server 2012 R2 supports several […]

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Common Problems 119058

Ubuntu 14.04 LTS Apache2 Fails with Address Already in Use

🟡 Medium   ⏱ 5–30 min  Last verified: 19 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 — Bug fix of NetworkManager — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Bug fix of NetworkManager (ELSA-2025-0288)

🟡 Medium   ⏱ 10–30 min  Last verified: 19 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-0288 Related CVEs: CVE-2024-3661 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 118495

UFW Blocks SSH or Application Ports Unexpectedly

🟡 Medium   ⏱ 5–30 min  Last verified: 19 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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Common Problems 115446

RHEL 7 service network Restart Drops Active SSH Sessions

🟠 High   ⏱ 5–30 min  Last verified: 19 January 2021 Affected versions: RHEL 7 📖 ~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 115409

RHEL 7 service reports running but application port is not listening

🟠 High   ⏱ 5–30 min  Last verified: 19 January 2021 Affected versions: RHEL 7 📖 ~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 Install Elasticsearch on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Install Elasticsearch on Oracle Linux 8

Introduction This tutorial demonstrates how to Install Elasticsearch 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 AppStream […]

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