Practical SSH Hardening
A short, sensible checklist for locking down an SSH server without locking yourself out.
Blog
Notes on Linux, security, development, and infrastructure.
Writing Reliable Bash Scripts
Three habits — strict mode, quoting, and small functions — that turn fragile shell scripts into dependable tools.
Getting Started with the Linux Command Line
A friendly tour of the shell — the handful of commands that turn the terminal from intimidating to indispensable.