nicolas@ubuntu ~/src> cat --[tab]
--help                       (Display help and exit)
--number                          (Number all lines)
--number-nonblank            (Number nonblank lines)
--show-all      (Escape all non-printing characters)
--show-ends               (Display $ at end of line)
--show-tabs                             (Escape tab)
--squeeze-blank  (Never more than single blank line)
--version                 (Display version and exit)
nicolas@ubuntu ~/src> cat --