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Oracle Linux 8 — osinfo-db and libosinfo — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

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

🟢 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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Common Problems 118439

Ubuntu 16.04 LTS UFW Rules Block Return Traffic

🟡 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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Common Problems 115625

RHEL 7 systemctl Service Restart Loop Triggered by OOM Kills

🟠 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 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use AIX Trusted Boot on IBM AIX 7.2

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

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

🟡 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 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Manage Users and Groups on IBM AIX 7.2

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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What is a Container? — step-by-step Docker tutorial on Progressive Robot

What is a Container?

A container is a minimalist, isolated user-space environment that runs at the operating system level and shares system resources with other instances. Containers are designed to provide a portable and consistent runtime environment for applications, while consuming less resources than a traditional server or virtual machine. This allows for an overall better use of computing resources in multi-component, distributed applications, and highly-available systems.

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Reverse a Linked List — step-by-step Programming tutorial on Progressive Robot

Reverse a Linked List

URL: https://www.progressiverobot.com/reverse-a-linked-list/ Reversing a Linked List is an interesting problem in data structure and algorithms. In this tutorial, we'll be discussing the various algorithms to reverse a [Linked List](/community/tutorials/java-linkedlist-linkedlist-java) and then implement them using Java. Reverse a Linked List LinkedList is a data structure which stores the data in a linear way. Though not in […]

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