December 2020 - Page 40 of 69

The dpkg Command in Linux - A Beginners Reference — step-by-step Linux tutorial on Progressive Robot

The dpkg Command in Linux – A Beginners Reference

Let's discuss the dpkg command in Linux in this article. Packages help in delivering or installing any application on a Linux system. Essentially, packages are compressed archive of the files and dependencies required to install a program or service. These packages are used when you want to install a new program or service on their […]

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Difference between Abstract Class and Interface in Java — step-by-step Programming tutorial on Progressive Robot

Difference between Abstract Class and Interface in Java

Difference between Abstract Class and Interface is one of the popular interview questions. Abstract Class and Interface are a core part of the Java programming language. Whether to choose an interface or abstract class is a design decision that every architect faces. In our last articles, we have provided as much as possible details about […]

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¿Cómo Instalar y Proteger phpMyAdmin en Ubuntu 16.04? — step-by-step Linux tutorial on Progressive Robot

¿Cómo Instalar y Proteger phpMyAdmin en Ubuntu 16.04?

Aunque muchos usuarios necesitan la funcionalidad de un sistema de gestión de bases de datos como MySQL, pueden no sentirse cómodos de interactuar con el sistema únicamente desde la consola de MySQL. PhpMyAdmin fue creado para que los usuarios puedan interactuar con…

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Java Data Types Tutorial – Primitive & Reference Types 2025–2026

Java Data Types Tutorial – Primitive & Reference Types 2025–2026

If you’re searching for a clear Java data types tutorial, you’re in the perfect place — understanding Java data types is one of the most foundational and frequently asked topics in any Java learning path. Java is a statically typed language, which means every variable must have a declared type before you use it. This strict typing catches errors early (at compile time), improves performance, makes code more predictable, and helps large teams maintain complex projects. In contrast, dynamically typed languages like Python or JavaScript let you skip type declarations, but you often find bugs only at runtime.

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Bootstrap Sampling in Python — step-by-step Python tutorial on Progressive Robot

Bootstrap Sampling in Python

This is a tutorial on Bootstrap Sampling in Python. In this tutorial, we will learn what is bootstrapping and then see how to implement it. Let's get started. What is Bootstrap Sampling? The definition for bootstrap sampling is as follows : > _In statistics, Bootstrap Sampling is a method that involves drawing of sample data […]

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Oracle Linux 8 — libreswan — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — libreswan — security and stability fixes — required update (ELSA-2023-3095)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-3095 Related CVEs: CVE-2023-23009 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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SLES 15 — spice-vdagent — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — spice-vdagent — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:3268-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-25653 CVE-2020-25650 CVE-2020-25651 CVE-2020-25652 CVE-2017-15108 Upstream summary: A race condition vulnerability was found in the way the spice-vdagentd daemon handled new client connections. This flaw […]

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Common Problems 118626

Ubuntu 16.04 locale warnings cannot set LC_ALL

🟡 Medium   ⏱ 5–30 min  Last verified: 20 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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Common Problems 114109

RHEL 10 – tuned profile reverts after reboot and performance degrades – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 […]

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