EtchStack

EtchStack turns learning the command line into a daily habit. Guess the hidden term, one letter at a time — a familiar word-puzzle format built around the tools real engineers use every day. From kubectl to iptables, EtchStack helps you recognize, recall, and retain the vocabulary of modern DevOps and systems work. A puzzle a day. Each day brings a fresh challenge. Keep your streak alive and make learning stick through consistent, low-effort practice. Built on how memory actually works. EtchStack uses spaced repetition to resurface terms right when you're about to forget them, so practice turns into lasting fluency. Real coverage, always growing. Hundreds of terms across Linux, Docker, Kubernetes, Ansible and Git today — with new technologies added regularly. Grouped by topic so you can focus on the stack you care about. Try before you sign up. Jump straight into guest puzzles with no account needed. Create a free account to save progress, track streaks, and sync across devices. Whether you're studying for a certification, onboarding into a new role, or just sharpening skills you already use, EtchStack makes the command line a little more second-nature every day. Start your streak today.