How To Install and Configure Elasticsearch on CentOS 7
is a platform for distributed search and analysis of data in real time. Its popularity is due to its ease of use, powerful features, and scalability.
How To Harden OpenSSH Client on Ubuntu 18.04
Linux servers are often administered remotely using SSH by connecting to an OpenSSH server, which is the default SSH server software used within Ubuntu, Debian, CentOS, FreeBSD, and most other Linux/BSD-based systems. Significant effort is put into securing the server-side aspect of SSH, as SSH acts as the entry into your server. In this tutorial, you will harden your OpenSSH client in order to help ensure that outgoing SSH connections are as secure as possible.
A Deeper Dive into Graph Neural Networks
Learn the fundamentals of Graph Neural Networks, how they work, and how to implement them using PyTorch. Explore key concepts and examples.
How to Manage System Packages with yum on RHEL 7
How to Manage System Packages with yum on RHEL 7 Package management is one of the most fundamental skills for a RHEL 7 system administrator. The Yellowdog Updater Modified (yum) is the default package manager on RHEL 7, and it handles everything from installing and removing software to managing repositories, grouping related packages, and maintaining […]
CSS3: A Quick Intro
A general and quick overview of some of the features in what we call CSS3.
Ubuntu 18.04 APT Lock Contention Blocks Security Updates
🟡 Medium ⏱ 5–30 min Last verified: 19 October 2020 📖 ~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 […]
Oracle Linux 8 — .NET 6.0 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2023-0079)
🟡 Medium ⏱ 10–30 min Last verified: 19 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2023-0079 Related CVEs: CVE-2023-21538 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
Windows Server 2019 — winget install fails with package signature verification error — Fix & Prevention
🟠 High ⏱ 5–30 min Last verified: 19 October 2020 Affected versions: Windows Server 2019 📖 ~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 […]
Understanding Destructuring, Rest Parameters, and Spread Syntax in JavaScript
Introduced in ECMAScript 2015 (ES6), destructuring, rest parameters, and spread syntax provide more direct ways of accessing the members of an array or an object, and can make working with data structures quicker and more succinct. In this article, you will learn how to destructure objects and arrays in JavaScript, how to use the spread operator to unpack objects and arrays, and how to use rest parameters in function calls.
Arch Linux — wireshark-cli — multiple vulnerabilities (20 CVEs) — patch and remediation guide
🔴 Critical ⏱ 15–90 min Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read • Source: Arch ASA ASA-202004-10 Related CVEs: CVE-2020-11647 CVE-2018-19628 CVE-2018-19627 CVE-2018-19626 CVE-2018-19625 CVE-2018-19624 CVE-2018-19623 CVE-2018-19622 +12 more Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 3.2.2-1. Fixed in: 3.2.3-1. Group: AVG-1129. Table of […]