Send a message straight to someone's terminal, if they're logged in: write alice hello, want to try the board later? write alice then type, and ctrl-d to send `finger @runv.club` shows who is on. If messages pop up while you're working and you'd rather they didn't: mesg n nobody can write to you mesg y back on mesg tells you which one it is talk isn't here: Debian dropped it. For a real conversation, `chat`.