Find finds files. It is similar to the Unix command. It uses REs, not globs,
for matching.
OPTIONS:
-d: enable debugging in the find package
-mode integer-arg: match against mode, e.g. -mode 0755
-type: match against a file type, e.g. -type f will match files
-name: glob to match against file
-l: long listing. It's not very good, yet, but it's useful enough.