MPE/iX Shell and Utilities Reference Manual, Vol 1

du(1) MPE/iX Shell and Utilities du(1)
Message: Unknown option "–option"
Cause: You specified an option that is not valid for du.
Action: Check the DESCRIPTION section for a list of valid du options.
PORTABILITY
POSIX.2. x/OPEN
Portability Guide 4.0. All UNIX systems.
The –t option is an extension to the POSIX standard.
MPE/iX NOTES
This release of MPE/iX does not provide the lstat() API. As a result, this command cannot
return information on the link itself. It attempts to determine when a symbolic link has been
referenced, but can only return the information on the target of the link, rather than the link
itself.
For more information on how the current
MPE/iX implementation may affect the operation of
this utility, see Appendix A, MPE/iX Implementation Considerations.
SEE ALSO
find(1), ls(1)
1-192 Commands and Utilities