Hi, I'm Leonardo Diniz.

I'm a developer who writes about Linux, security, and building reliable infrastructure. This is where I share what I learn and the projects I build.

Practical SSH Hardening

March 2, 2026

A short, sensible checklist for locking down an SSH server without locking yourself out.

March 2, 2026

Three habits — strict mode, quoting, and small functions — that turn fragile shell scripts into dependable tools.

January 15, 2026

A friendly tour of the shell — the handful of commands that turn the terminal from intimidating to indispensable.