Logging Monitoring

Alpine Linux edge — libvncserver — multiple vulnerabilities (16 CVEs) — patch and remediation guide

• October 10, 2020
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.9.13-r5 📖 ~4 min read  •  Source: Alpine secdb entry — libvncserver 0.9.13-r5 Related CVEs: CVE-2020-29260 CVE-2019-20839 CVE-2019-20840 CVE-2020-14397 CVE-2020-14399 CVE-2020-14400 CVE-2020-14401 CVE-2020-14402  +8 more Upstream summary: Alpine community repository for vedge ships libvncserver 0.9.13-r5 which […]

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Ubuntu 18.04 — spice — multiple vulnerabilities (4 CVEs) — patch and remediation guide

• October 10, 2020
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 10 October 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4572-1 Related CVEs: CVE-2020-14355 CVE-2019-3813 CVE-2018-10873 CVE-2017-12194 Upstream summary: Frediano Ziglio discovered that Spice incorrectly handled QUIC image decoding. A remote attacker could use this to cause Spice to crash, […]

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How to Install and Configure AIDE on RHEL 7

• October 10, 2020
• Linux
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How to Install and Configure AIDE on RHEL 7 AIDE (Advanced Intrusion Detection Environment) is a host-based intrusion detection system (HIDS) that works by taking a cryptographic snapshot of your filesystem at a known-good point in time and then comparing the current state of the filesystem against that baseline to identify any files that have […]

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Oracle Linux 8 — dotnet security and bugfix update (ELSA-2021-0474)

• October 9, 2020
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 9 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0474 Related CVEs: CVE-2021-1721 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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Ubuntu 14.04 LTS MySQL Fails to Start After Unclean Shutdown

• October 9, 2020
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 9 October 2020 Affected versions: 14.04 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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Ubuntu 14.04 LTS Kernel Panic After Unattended Upgrade

• October 9, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 9 October 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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Ubuntu 18.04 LTS – AppArmor profile denial breaks custom application startup – Fix & Prevention

• October 9, 2020
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 9 October 2020 Affected versions: Ubuntu 18.04 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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firewalld Rich Rule Works in Runtime but Lost After Reboot

• October 9, 2020
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 9 October 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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How to Configure Windows Server 2012 R2 with PowerShell

• October 9, 2020
• Tutorials
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Introduction PowerShell 4.0, which ships with Windows Server 2012 R2, brings Desired State Configuration (DSC), enhanced debugging, and improved workflows to Windows administration. Performing initial configuration through PowerShell rather than the GUI creates repeatable, auditable, and scriptable setup procedures that work consistently across all servers. This guide covers every initial configuration task using PowerShell 4.0 […]

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How to Set Up Oracle Linux 8 Cluster with Oracle Grid Infrastructure

• October 9, 2020
• Oracle Linux
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Introduction This tutorial demonstrates how to Set Up Oracle Linux 8 Cluster with Oracle Grid Infrastructure 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 […]

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