Operations

Arch Linux — nextcloud — multiple vulnerabilities (12 CVEs) — patch and remediation guide

• January 30, 2021
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202107-22 Related CVEs: CVE-2021-32741 CVE-2021-32734 CVE-2021-32733 CVE-2021-32726 CVE-2021-32725 CVE-2021-32705 CVE-2021-32703 CVE-2021-32688  +4 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 21.0.2-1. Fixed in: 21.0.3-1. Group: AVG-2144. Table of contents […]

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How to Configure System Center Virtual Machine Manager on Windows Server 2016

• January 30, 2021
• Tutorials
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How to Configure Windows Server 2016 Virtual Machine Manager System Center Virtual Machine Manager (VMM) is Microsoft’s centralized management platform for virtualized infrastructure. VMM provides a unified interface for managing Hyper-V hosts, VMware vSphere environments, storage fabrics, and private cloud resources built on Windows Server 2016. With VMM you can deploy and migrate virtual machines, […]

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Oracle Linux 8 — osinfo-db and libosinfo — security and stability fixes — required update (ELSA-2019-3387)

• January 29, 2021
• Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 29 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3387 Related CVEs: CVE-2019-13313 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 16.04 LTS UFW Rules Block Return Traffic

• January 29, 2021
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 29 January 2021 Affected versions: 16.04 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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RHEL 7 systemctl Service Restart Loop Triggered by OOM Kills

• January 29, 2021
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 29 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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How to Use AIX Trusted Boot on IBM AIX 7.2

• January 29, 2021
• IBM AIX
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Introduction IBM AIX 7.2 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 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use aix trusted boot on ibm aix 7.2 on […]

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How to Set Up Database Backups with Percona XtraBackup on Oracle Linux 8

• January 29, 2021
• Oracle Linux
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Introduction Setting up set up database backups with percona xtrabackup 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 Set Up Database Backups with Percona XtraBackup on Oracle Linux 8, with all the commands you need, […]

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Alpine Linux edge — py3-impacket — vulnerability — patch and remediation guide

• January 29, 2021
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.9.23-r0 📖 ~4 min read  •  Source: Alpine secdb entry — py3-impacket 0.9.23-r0 Related CVEs: CVE-2021-31800 Upstream summary: Alpine community repository for vedge ships py3-impacket 0.9.23-r0 which addresses CVE-2021-31800. Table of contents Symptom & Impact Environment […]

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How to Manage Users and Groups on IBM AIX 7.2

• January 29, 2021
• IBM AIX
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Introduction IBM AIX 7.2 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 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to manage users and groups on ibm aix 7.2 on […]

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IBM AIX 7.2 — CVE-2020-4161 — denial of service — patch and remediation guide

• January 29, 2021
• Tutorials
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🟡 Medium   ⏱ 15–45 min  Last verified: 29 January 2021 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2020-4161, IBM Support Bulletin CVE: CVE-2020-4161 NVD summary: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5 could allow an authenticated attacker to cause a denial of service due […]

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