English Dictionary: DD | by the DICT Development Group |
4 results for DD | |
From WordNet (r) 3.0 (2006) [wn]: | |
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From Jargon File (4.2.0, 31 JAN 2000) [jargon]: | |
dd /dee-dee/ vt. [Unix: from IBM {JCL}] Equivalent to {cat} or {BLT}. Originally the name of 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". The Unix `dd(1)' was designed with a weird, 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. The jargon usage is now very rare outside Unix sites and now nearly obsolete even there, as `dd(1)' has been {deprecated} for a long time (though it has no exact replacement). The term has been displaced by {BLT} or simple English `copy'. | |
From The Free On-line Dictionary of Computing (15Feb98) [foldoc]: | |
DD 1. 2. {Data Dictionary}. [{Jargon File}] (1998-08-28) | |
From The Free On-line Dictionary of Computing (15Feb98) [foldoc]: | |
dd 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". The Unix "dd" was designed with a weird, 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. The jargon usage is now very rare outside Unix sites and now nearly obsolete even there, as "dd" has been {deprecated} for a long time (though it has no exact replacement). The term has been displaced by {BLT} or simple English "copy". [{Jargon File}] (1995-02-03) |