January 2021 - Page 33 of 69

Common Problems 115024

RHEL 8 Boot Drops to Dracut Emergency Shell

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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 Set Up a Private Docker Registry on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up a Private Docker Registry on RHEL 9

A private Docker registry allows organisations to store and distribute container images internally, without relying on Docker Hub or a cloud registry. This is essential for teams working with proprietary application images that cannot be stored in public registries, organisations with strict data sovereignty requirements, and environments with limited internet access. Docker provides an official […]

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Oracle Linux 8 — dhcp — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dhcp — vulnerability — patch and remediation guide (ELSA-2021-2359)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-2359 Related CVEs: CVE-2021-25217 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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How To Configure ProFTPd To Use SFTP Instead of FTP — step-by-step Linux tutorial on Progressive Robot

How To Configure ProFTPd To Use SFTP Instead of FTP

ProFTPd is a popular FTP server for transferring files between your local computer and server. However, FTP as a protocol is very insecure. In this guide, we will show you how to configure ProFTPd to use SFTP, a secure alternative, instead of FTP.

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

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2021-9474)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9474 Related CVEs: CVE-2021-3743 CVE-2021-40490 CVE-2021-3739 CVE-2021-37159 CVE-2021-38198 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Getting Started with The Yii PHP Framework - Part 2 — step-by-step Linux tutorial on Progressive Robot

Getting Started with The Yii PHP Framework – Part 2

In this tutorial, we continue what we started last time when we installed the Yii framework on the VPS and created our first application. We will go ahead and use some of the code generation tools provided by Yii to set up a first model for our data, generate the code for the CRUD operations, and take a look at how a typical Yii application workflow works.

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IBM AIX 7.1 — CVE-2020-4762 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.1

IBM AIX 7.1 — CVE-2020-4762 — vulnerability — patch and remediation guide

🟠 High   ⏱ 30–90 min  Last verified: 25 May 2026 Affected versions: IBM AIX 7.1 📖 ~4 min read  •  Source: NVD CVE-2020-4762, IBM Support Bulletin CVE: CVE-2020-4762 NVD summary: IBM Sterling B2B Integrator Standard Edition 5.2.0.0 through 5.2.6.5_2, 6.0.0.0 through 6.0.3.2, and 6.1.0.0 could allow an authenticated user to create a privileged account […]

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¿Cómo instalar Linux, Apache, MySQL, PHP (LAMP) en Ubuntu 14.04? — step-by-step Linux tutorial on Progressive Robot

¿Cómo instalar Linux, Apache, MySQL, PHP (LAMP) en Ubuntu 14.04?

Se denomina “LAMP” a un grupo de software de código libre que se instala normalmente en conjunto para habilitar un servidor para alojar sitios y aplicaciones web dinámicas. Este término en realidad es un acrónimo que representa un sistema operativo Linux con un servior Apache, el sitio de datos es almacenado en base de datos MySQL y el contenido dinámico es procesado con PHP.

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Unmasking Phishing Attacks and Social Engineering: A Comprehensive Guide to Safeguarding Against Deceptive Tactics

Unmasking Phishing Attacks and Social Engineering: A Comprehensive Guide to Safeguarding Against Deceptive Tactics

In the ever-evolving landscape of cybersecurity, phishing attacks and social engineering have emerged as formidable threats. With attackers employing increasingly deceptive tactics, staying informed about the latest techniques and promoting user awareness has become critical. This article explores the intricacies of phishing attacks and social engineering, emphasizing the importance of proactive defense strategies.

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