The Linux Roadmap

Why almost every server, container, and cloud instance on earth runs Linux, and the handful of ideas that make the terminal make sense.

Create, edit, and move files safely — then understand exactly who's allowed to touch what, and why.

Small, single-purpose tools, piped together — the idea that makes the command line more powerful than any GUI for real text work.

Every running program is a process with a life cycle you can inspect, control, and signal — and systemd is how modern Linux keeps them running unattended.

Inspect connections, open ports safely, and use SSH the way it's actually used in production — keys, not passwords.

Install software correctly, isolate project dependencies from the system, and configure environment variables the way real deployments expect.

Turn a sequence of commands you keep retyping into a saved, reliable script — variables, conditionals, loops, and functions, all in bash.

Disk space, logs, scheduled jobs, and security hardening — the operational habits that keep a real server healthy long after the first deploy.

What happens from power-on to login, the kernel's windows into itself (/proc, /sys), finding the real bottleneck on a slow server, tracing a misbehaving process with strace and lsof, and a playbook for the incidents you'll meet most.