Linux
I Deleted 10GB on Linux. Why Was My Disk Still Full?
A real Linux lab: deleting a 10 GiB file leaves disk usage at 70%. Diagnose the open file with lsof +L1, release it safely, and verify the recovered space.
LINUX • SRE • DEVOPS • CAREER
I'm Abe. I've spent 20+ years building systems, solving production problems, and interviewing engineers.
Now I share what I've learned to help engineers build real skills, navigate interviews, and grow their careers.

Practical engineering, interview prep, and career advice from CTRL+CHAOS.
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A real Linux lab: deleting a 10 GiB file leaves disk usage at 70%. Diagnose the open file with lsof +L1, release it safely, and verify the recovered space.
Being a strong engineer and getting hired are related, but they are not the same skill.
I built a practical job-search system for engineers, from building real experience and writing a stronger resume to technical and behavioral interviews.
Practical courses built around real skills, not theory.
Linux
Build practical Linux skills through hands-on labs and real-world administration scenarios.
Linux Security
Learn how to audit, harden, and protect Linux systems using practical security techniques.
I'm Abe — an engineer focused on Linux, site reliability, and DevOps. I share what I've learned building and operating production systems, navigating engineering careers, and preparing for technical interviews.
CTRL+CHAOS is where I document that work: clear explanations, real-world context, and resources that actually help you grow.