ASCII Cinema

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Start

asciinema rec demo.cast

Concerning storage: if you have a fancy oh my zsh theme with a ticking time display, that will fill up some memory (though slowly).

Recording Shell with custom theme

bash --noprofile --norc

So for asciinema rec -c <command> <output.cast> you can run

asciinema rec --command "bash --noprofile --norc" demo.cast

or shorter

asciinema rec --c "bash --noprofile --norc" demo.cast

End

ctrl+d or exit (similar to tmux, etc.)

Play

asciinema rec demo.cast

Conversion

For gifs: asciinema gif generator - agg with agg demo.cast first.gif