tlearn
tlearn is an interactive Linux tool to learn command-line skills. It
consists of a front-end Bash script called tlearn and a set of
lesson scripts, one for each lesson.
There is a file called functions which holds a number of simple Bash
functions that can be called to make writing lessons a bit easier. The
functions mainly help control the sessions, panes and windows of tmux.
For now, this is all in an early stage of development. I'd recommend
that you read through the functions file, and also the
command_line_basics_part1.tl lesson file.