This is my personal site, but instead of the usual landing page it drops you into an interactive shell.
It's a React SPA with a virtual filesystem and command history. About 28 commands work the way you'd expect (ls, cd, cat, tree, find, grep, head, tail, wc, which, man, history, mkdir, touch, rm, cp, mv, echo, env, sudo, open, clear, pwd, whoami, date, uname, vi, vim). Tab completion, piping where it makes sense, and a help if you get stuck.
I keep adding commands when I'm bored, suggestions welcome.
Try help or just ls.
PS. Can you find the Easter-egg?