March 2021 - Page 50 of 63

How to Monitor System Resources on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Monitor System Resources on Oracle Linux 8

Introduction Setting up monitor system resources 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 Monitor System Resources on Oracle Linux 8, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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Common Problems 118391

Ubuntu 16.04 Wi-Fi disconnects or fails to reconnect

🟡 Medium   ⏱ 5–30 min  Last verified: 7 March 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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How to Configure Kerberos Authentication on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure Kerberos Authentication on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure kerberos authentication on ibm aix 7.1 on IBM […]

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How to Configure VM Disk Types (VHD and VHDX) on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure VM Disk Types (VHD and VHDX) on Windows Server 2012 R2

How to Configure VM Disk Types (VHD and VHDX) on Windows Server 2012 R2 Virtual hard disk configuration is foundational to Hyper-V performance and reliability. Windows Server 2012 R2 supports two virtual disk formats — the legacy VHD and the modern VHDX — each with their own characteristics, size limits, and operational considerations. Choosing the […]

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Compreendendo bancos de dados relacionais — step-by-step DevOps tutorial on Progressive Robot

Compreendendo bancos de dados relacionais

Os sistemas de gerenciamento de banco de dados (SGDB, no inglês DMBS) são programas de computador que permitem que usuários interajam com um banco de dados. Um DBMS permite que os usuários controlem o acesso a um banco de dados, gravem dados, executem consultas e façam outras…

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Amazon Linux 2 — dcraw — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — dcraw — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2025-3017 Related CVEs: CVE-2021-3624 Upstream summary: There is an integer overflow vulnerability in dcraw. When the victim runs dcraw with a maliciously crafted X3F input image, arbitrary code may be […]

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How To Set Filesystem Quotas on Debian 9 — step-by-step Linux tutorial on Progressive Robot

How To Set Filesystem Quotas on Debian 9

Quotas are used to limit the amount of disk space a user or group can use on a filesystem. Without such limits, a user could fill up the machine’s disk and cause problems for other users and services. In this tutorial we will install command line tools to create and inspect…

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Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide (ELSA-2022-9013)

🟠 High   ⏱ 15–60 min  Last verified: 7 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-9013 Related CVEs: CVE-2021-4155 CVE-2021-0920 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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How to Set Up Windows Event Forwarding (WEF) on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up Windows Event Forwarding (WEF) on Windows Server 2012 R2

How to Set Up Windows Event Forwarding (WEF) on Windows Server 2012 R2 Windows Event Forwarding (WEF) is a native Windows mechanism that allows you to centralize security events from dozens or hundreds of servers onto a dedicated collector server—without deploying an agent or purchasing additional software. WEF uses the WS-Management protocol (the same protocol […]

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