tree(1) on Linux
The text 6af44d9f2549, as Debian 1.2 (Rex) shipped it.
list contents of directories in a tree-like format.
Flags it lists
-
-A -
-C -
-F -
-P -
-a -
-d -
-f -
-i -
-l -
-n -
-p -
-s -
-x