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Common Problems 117398

Ubuntu 20.04 LTS – apt update fails because dpkg lock is held

🟠 High   ⏱ 5–30 min  Last verified: 15 January 2021 Affected versions: Ubuntu 20.04 LTS Ubuntu 20.04 Ubuntu 20.04.6 📖 ~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 […]

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Common Problems 115459

RHEL 7 NetworkManager overwriting static ifcfg network settings

🟡 Medium   ⏱ 5–30 min  Last verified: 15 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 114997

Podman Container Cannot Reach External Network

🟡 Medium   ⏱ 5–30 min  Last verified: 15 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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How to Configure VIO Server for LPAR Virtualization on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure VIO Server for LPAR Virtualization 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 configure vio server for lpar virtualization on ibm aix […]

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Java Annotations — step-by-step Programming tutorial on Progressive Robot

Java Annotations

URL: https://www.progressiverobot.com/java-annotations/ Java Annotations provides information about the code. Java annotations have no direct effect on the code they annotate. In java annotations tutorial, we will look into the following; Built-in Java annotations How to write Custom Annotation Annotations usage and how to parse annotations using [Reflection API](/community/tutorials/java-reflection-example-tutorial). Java Annotations ![java annotations, annotations in java, […]

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Arch Linux — ansible — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — ansible — multiple vulnerabilities (3 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-202102-9 Related CVEs: CVE-2021-20191 CVE-2021-20180 CVE-2021-20178 Upstream summary: Type: information disclosure. Status: Fixed. Affected: 2.10.5-1. Fixed in: 2.10.7-1. Group: AVG-1437. Table of contents Symptom & Impact Environment & Reproduction Root […]

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How to Schedule Tasks with Cron on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Schedule Tasks with Cron on Oracle Linux 8

Introduction How to Schedule Tasks with Cron on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration […]

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Installing WordPress on Ajenti V — step-by-step Linux tutorial on Progressive Robot

Installing WordPress on Ajenti V

Ajenti is an open source, web-based control panel that can be used for a large variety of server management tasks. In this tutorial we will install a WordPress blog, using the tools Ajenti V provides.

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