Я получил ответ
mkdir -p mydir/{colors,shape,animals}
mkdir -p mydir/colors/{basic,blended}
touch mydir/colors/basic/{red,blue,green}
touch mydir/colors/blended/{yellow,orange,pink}
touch mydir/shape/{circle,square,cube}
mkdir -p mydir/animals/{mammals,reptiles}
touch mydir/animals/mammals/{platypus,bat,dog}
touch mydir/animals/reptiles/{snakes,crocodile,lizard}