$ curl cheat.sh/
 cheat:tree 
# 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

 tldr:tree 
# tree
# Show the contents of the current directory as a tree.
# More information: <http://mama.indstate.edu/users/ice/tree/>.

# Print files and directories up to 'num' levels of depth (where 1 means the current directory):
tree -L num

# Print directories only:
tree -d

# Print hidden files too with colorization on:
tree -a -C

# Print the tree without indentation lines, showing the full path instead (use `-N` to not escape non-printable characters):
tree -i -f

# Print the size of each file and the cumulative size of each directory, in human-readable format:
tree -s -h --du

# Print files within the tree hierarchy, using a wildcard (glob) pattern, and pruning out directories that don't contain matching files:
tree -P '*.txt' --prune

# Print directories within the tree hierarchy, using the wildcard (glob) pattern, and pruning out directories that aren't ancestors of the wanted one:
tree -P directory_name --matchdirs --prune

# Print the tree ignoring the given directories:
tree -I 'directory_name1|directory_name2'

$
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