Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

PATH

The list of folders a terminal searches to find a command.

PATH is an environment variable listing directories the shell searches, in order, for an executable when you type a command name.

Read the full section →