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}}'