DD
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DD
(storage)DD
(database)DD
(programming)dd
(4)A Unix copy command with special options suitable for
block-oriented devices; it was often used in heavy-handed
system maintenance, as in "Let's "dd" the root partition
onto a tape, then use the boot PROM to load it back on to a
new disk".
dd had a distinctly non-Unixy keyword option syntax reminiscent of IBM System/360 JCL (which had an elaborate DD "Dataset Definition" specification for I/O devices). Though the command filled a need, the interface design was clearly a prank.
dd had a distinctly non-Unixy keyword option syntax reminiscent of IBM System/360 JCL (which had an elaborate DD "Dataset Definition" specification for I/O devices). Though the command filled a need, the interface design was clearly a prank.
DD
On drawings, abbr. for Dutch door.
DD
(1) See Dolby Digital.(2) (Double Density) The designation for the first generation of floppy disks (for details, see HD). See floppy disk.