Hi, I'm Cesar Santos.

$ cat purpose.txt

What is CommandLinux?

CommandLinux is my space for learning in public. Writing helps me reinforce what I learn, organize concepts, and identify what I still need to study. By publishing these notes, I hope to make the path a little easier for people learning the same subjects.

Much of the content comes from my studies in LINUXtips training programs: PICK — Intensive Containers and Kubernetes Program,LNC — Linux for Cloud Native,Building Pipelines and Automations with GitHub Actions, andIaC and Pipeline Specialist. I also share lessons from my postgraduate studies in Cyber Security — Red Team at FIAP.

$ whoami --learning

My journey

My journey began in back-end development, building applications and understanding how code solves business problems. Over time, I became increasingly interested in what happens after an application is developed: how it is packaged, tested, deployed, observed, secured, and kept available in production.

That interest led me to begin a career transition into DevOps and Cloud Native. Today I study Linux, Docker, Kubernetes, GitHub Actions, infrastructure as code, pipelines, and cloud services from AWS, Oracle Cloud, and Google Cloud. My goal is to connect my development experience with a broader view of the software lifecycle, from building applications to running and operating them in the cloud.

My postgraduate degree in Cyber Security — Red Team complements this path by adding an offensive security perspective. I want to understand not only how to build and operate systems, but also how to identify risks and make systems secure from the start.

I am still gaining experience in this new field, and I do not write as someone who has all the answers. I write as someone who studies, tests, researches, practices, and documents what they learn. CommandLinux records this progress openly and honestly.

$ cat editorial-policy.md

Editorial policy

The articles represent my understanding at the time they were written. They are original notes, reorganized and supplemented with research and practice; they are not official materials from LINUXtips, FIAP, or any other institution mentioned here.

Technology changes quickly, and I can make mistakes too. If you find outdated information, want to suggest a correction, or have an idea for a topic, I will be happy to hear from you.