Jelly Shell: A Dad Built a Playful Interactive Tutorial to Teach Kids the Unix Command Line
julianharris · x · 2026-10-19
A developer vibe-coded Jelly Shell (unixjelly.replit.app) on Replit to teach his young son the basics of the Unix command line — and the kid finished the whole thing, laughing along the way.
- Kid-friendly design: wobbly jelly 3D letters and the framing of "boss your computer around with tiny words"
- Covers echo, pwd, ls, cd, cat, mkdir, cp, mv, rm, tab shortcuts and man, each with a visual "backstage" animation showing shell → /bin → kernel → disk
- Includes a live sandbox to practice in, with progress saved in the browser; code partially released under GPL-3.0
- The pitch: commands invented in 1971 still run on Macs, Linux and Raspberry Pis — learn once, use for life
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