# To display a recursive directory tree:
tree

# To make tree output contents from <dir>:
tree <dir>

# To make tree omit any empty directories from the output:
tree --prune

# To make tree list *all* files and directories, even hidden ones:
tree -a

# To list directories only (`-d`), and at a max depth of two levels (`-L`):
tree -d -L 2
