Topics
Command-line/Unix intro
Intro reading: two articles on "command line bullshittery" (the original post by Philip Guo that introduced this term is no longer available, alas ...) (Also see [^1])
Software Carpentry 'shell-novice' lesson; setup instructions
Terminus, a command-line aventure game for practicing file-system navigation
an educative.io command-line course (the syllabus is a useful catalog of shell skills)
Google form
commands.dev (catalog of shell-command recipes)
Software Carpentry 'shell extras' lesson