chown changes the owner of the filenames to owner. The owner may be either a decimal user ID
(UID) or a login name found in the password file. An optional group may also be specified. The group may be either a decimal group ID (GID) or
a group name found in the GID file.
Only the super-user of the machine where the file is physically located can change owner, in order to simplify accounting procedures.
Recursively descend into directories setting the ownership of all files in each directory encountered. When symbolic links are encountered, their
ownership is changed, but they are not traversed.