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AlexCallejas/README.md

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🐧 Alex Callejas

Content Architect at Red Hat | Member of the Fedora Project | Technical Author & Reviewer | Open Source Advocate

I am an Open Source enthusiast and a lifelong SysAdmin with more than 25 years of experience in Unix/Linux infrastructure. Currently, I design global certification content at Red Hat, focusing on automation, security, and cloud technologies.

"Geek by nature, Linux by choice, Fedora of course..."


📚 Featured Publications

I am passionate about sharing knowledge through deep-dive technical literature and peer reviews.

Book Title Role Publisher
First Steps with Linux Technical Reviewer Sysxplore Press (2026)
Fedora Linux System Administration Author Packt Publishing (2023)

🎤 Upcoming Speaking Engagements

Catch me at these upcoming events where I'll be sharing insights on Linux, Cloud, and Open Source.

📂 Access my Presentation Slides Repository


✍️ Technical Writing & Articles

I regularly contribute to leading industry blogs on topics like SELinux, Ansible, and system security.


🛠️ Tech Stack & Expertise

  • OS: RHEL, Fedora, Debian, SUSE, Solaris, AIX.
  • Automation: Ansible, Shell Scripting, Python.
  • Cloud/Virtualization: OpenShift, OpenStack, VMware, AWS, GCP.
  • Security: Advanced SELinux Policy Administration.

Connect with me 🌎

Alex Callejas LinkedIn dark_axl Twitter rootzilopochtli YouTube


Last updated: April 2026

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  1. rootzilopochtli/sysadmin-notes rootzilopochtli/sysadmin-notes Public

    Repository of day-to-day notes as SysAdmin.

    Shell 1

  2. rootzilopochtli/introduccion-a-linux rootzilopochtli/introduccion-a-linux Public

    Repositorio de la serie "Introducción a Linux", que fusiona los temarios de LPIC-1, LFCS, y RHCSA.

    12 5

  3. rootzilopochtli/querida-encogi-el-cluster rootzilopochtli/querida-encogi-el-cluster Public

    🤏☸️ Orquestación de MicroShift en Nube Pública (AWS/GCP) y Local (Fedora Edge). Automatización para dominar el EDGE Computing y la soberanía del sistema operativo bajo la filosofía de Richard Feynman.

    Shell