/OUTPUT[=filespec]
       /NOOUTPUT

    The /OUTPUT qualifier controls where the output of the command is
    sent. The /NOOUTPUT qualifier suppresses output.

    If you specify /OUTPUT and a file specification
    (/OUTPUT=filespec), the output is sent to the specified file,
    rather than to the current output device, SYS$OUTPUT. If you do
    not enter the qualifier, or if you enter the /OUTPUT qualifier
    without a file specification, the output is sent to SYS$OUTPUT.

    Using the /OUTPUT qualifier does not affect the result (that is,
    the DCL symbol CHECKSUM$CHECKSUM).