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Rex Djere (741)

October 27, 2025

What a Successful RHCSA Candidate Must Master in the Vi/Vim and Nano Text Editors

Executive Summary This video and article emphasize that proficiency in a command-line text editor is a non-negotiable skill for passing the Red Hat…

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October 25, 2025

Computer Programming in GNU/Linux: The Differences and Similarities Between the Stack and the Heap 

Executive Summary This article provides a comprehensive analysis of the stack and the heap, the two primary memory regions used by a program…

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October 23, 2025

The Histories, Similarities and Differences of the APT and DNF GNU/Linux Package Managers

Executive Summary I wrote this article to present and compare two of the most dominant package management systems in the GNU/Linux world: APT…

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October 22, 2025

The History, Strengths, and Weaknesses of the EXT4 Filesystem on GNU/Linux

Executive Summary I wrote this article to research and present the Fourth Extended Filesystem (EXT4), the default filesystem for many GNU/Linux distributions. The…

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October 18, 2025

Strategies to Pass the RHCSA Exam on the 1st Attempt with a Perfect Score of 300

Executive Summary This guide provides a comprehensive strategy for achieving a perfect score of 300 on the Red Hat Certified System Administrator (RHCSA)…

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October 15, 2025

Mastering the GNU/Linux nmtui Command for the RHCSA Exam

Executive Summary I wrote this article to give RHCSA candidates a crucial strategic advantage for their exam. My goal is to demonstrate how…

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