h5math(1) on Linux
The text d25d2a40bb66, as Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
combine/create HDF5 files with math expressions
Flags it lists
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-0 -
-V -
-a -
-d -
-e -
-f -
-h -
-n -
-r -
-t -
-v -
-x -
-y -
-z