December 2020 - Page 19 of 69

Common Problems 118441

Ubuntu 16.04 LTS – initramfs unpacking failed during kernel update – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 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 118393

Ubuntu 16.04 LTS – apt lock prevents updates during maintenance windows – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 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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How to Set Up Port Knocking on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Set Up Port Knocking on SLES 15

Introduction This tutorial covers How to Set Up Port Knocking on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 15 system is up to date: zypper […]

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Common Problems 116024

Ubuntu 26.04 LTS – Docker daemon fails after cgroup configuration mismatch – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 26.04 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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How to Configure SSH on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure SSH 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 ssh on ibm aix 7.1 on IBM AIX […]

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How to Set Up Two-Factor Authentication on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Set Up Two-Factor Authentication 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 set up two-factor authentication on ibm aix 7.2 on […]

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UFW Essentials : règles et commandes de pare-feu — step-by-step Linux tutorial on Progressive Robot

UFW Essentials : règles et commandes de pare-feu

UFW est un outil de configuration de pare-feu pour les iptables qui est inclus dans Ubuntu par défaut. Sous forme d’aide-mémo, ce guide vous permettra de trouver rapidement les commandes UFW qui créeront des règles de pare-feu iptables qui sont utiles dans les scénarios classiques du quotidien. Ceci intègre des exemples UFW d’autorisation et de blocage de plusieurs services par port, interface de réseau ou adresse IP source.

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How To Install Odoo on Ubuntu 20.04 with Docker — step-by-step Docker tutorial on Progressive Robot

How To Install Odoo on Ubuntu 20.04 with Docker

Introduction Odoo is an open-source enterprise resource planning (ERP) tool written in Python. It supports a number of plugins for different kinds of business needs like accounting, payroll, inventory management, and more. In this tutorial you will install Odoo and a PostgreSQL database using Docker Compose, then install Nginx to act as a reverse proxy […]

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How to Set Up a Firewall with firewalld on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up a Firewall with firewalld on Oracle Linux 8

Introduction This tutorial demonstrates how to Set Up a Firewall with firewalld on Oracle Linux 8 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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