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$ learn --by-doing

The terminal toolkit for working alongside AI agents.

tmux, Neovim, git worktrees, fzf and friends, learned on a real Linux machine in your browser. Every step is checked as you go.

Start the free tmux lab Browse courses
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tmux

next: Your First tmux Session

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The toolkit, one course at a time

Ten short labs per tool. Each one runs on its own sandboxed machine.

01 · tmuxlive Sessions that survive Windows, panes, copy mode, your own config, one-command workspaces. [░░░░░░░░░░░░░░░░░░░░] 0% 15 labs · lab 1 free
02 · cli toolkitnext rg, fd, fzf, jq Find anything in a codebase in seconds, and read JSON without squinting. in the works
03 · gitsoon Parallel work Worktrees and lazygit: one branch per agent, nothing trampled. in the works
04 · neovimsoon LazyVim from zero Motions, search and LSP: review what the agent wrote, fast. in the works
05 · herdrsoon Herd your agents Run and watch several coding agents side by side. in the works
00 · foundationsfree Command line basics The shell from zero, plus 186 Linux lessons. Start here if the terminal is new. [░░░░░░░░░░░░░░░░░░░░] 0% 20 labs · CC BY-SA
~/courses (25)~/playground →
20 labs · beginner Command Line LinuxCommand Linefree 3 labs · beginner Linux Shell LinuxShellfree 15 labs · beginner tmux tmuxTerminal 11 lessons · grasshopper Getting Started LinuxLessonsfree 19 lessons · grasshopper Command Line LinuxLessonsfree 16 lessons · grasshopper Text-Fu LinuxLessonsfree 13 lessons · grasshopper Advanced Text-Fu LinuxLessonsfree 6 lessons · grasshopper User Management LinuxLessonsfree 8 lessons · grasshopper Permissions LinuxLessonsfree 11 lessons · grasshopper Processes LinuxLessonsfree 7 lessons · grasshopper Packages LinuxLessonsfree 7 lessons · journeyman Devices LinuxLessonsfree 12 lessons · journeyman The Filesystem LinuxLessonsfree 5 lessons · journeyman Boot the System LinuxLessonsfree 6 lessons · journeyman Kernel LinuxLessonsfree 7 lessons · journeyman Init LinuxLessonsfree 8 lessons · journeyman Process Utilization LinuxLessonsfree 6 lessons · journeyman Logging LinuxLessonsfree 5 lessons · networking nomad Network Sharing LinuxLessonsfree 9 lessons · networking nomad Network Basics LinuxLessonsfree 7 lessons · networking nomad Subnetting LinuxLessonsfree 7 lessons · networking nomad Routing LinuxLessonsfree 5 lessons · networking nomad Network Config LinuxLessonsfree 5 lessons · networking nomad Troubleshooting LinuxLessonsfree 6 lessons · networking nomad DNS LinuxLessonsfree

real machine

A sandboxed Linux box per lab. Break it, reload, carry on.

checked steps

Each step inspects what you actually did, not what you clicked.

any browser

No install, no fullscreen, no special keyboard setup.