Pour créer le répertoire toto avec tous les répertoires parents :

mkdir -p /home/repertoire/toto

Pour créer une arborescence :

mkdir -pv dir{1,2,3}/subdir{1,2,3}

mkdir: created directory `dir1/subdir1'
mkdir: created directory `dir1/subdir2'
mkdir: created directory `dir1/subdir3'
mkdir: created directory `dir2/subdir1'
mkdir: created directory `dir2/subdir2'
mkdir: created directory `dir2/subdir3'
mkdir: created directory `dir3/subdir1'
mkdir: created directory `dir3/subdir2'
mkdir: created directory `dir3/subdir3'

Pour supprimer une arborescence (les répertoires doivent être vides):

rmdir -v dir{1,2,3}/subdir{1,2,3}

rmdir: removing directory, dir1/subdir1
rmdir: removing directory, dir1/subdir2
rmdir: removing directory, dir1/subdir3
rmdir: removing directory, dir2/subdir1
rmdir: removing directory, dir2/subdir2
rmdir: removing directory, dir2/subdir3
rmdir: removing directory, dir3/subdir1
rmdir: removing directory, dir3/subdir2
rmdir: removing directory, dir3/subdir3