Cygwin comes with a number of command-line utilities that are used to
    manage the UNIX emulation portion of the Cygwin environment. While many of
    these reflect their UNIX counterparts, each was written specifically for
    Cygwin. You may use the long or short option names interchangeably; for
    example, --help and -h function
    identically. All of the Cygwin command-line utilities support the
    --help and --version options.