:dd: /dee-dee/ [UNIX: from IBM {JCL}] vt. 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'.
-- The AI Hackers Dictionary
{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'.
-- The AI Hackers Dictionary
Related:
- dd /dee-dee/ vt.
[Unix: from IBM JCL] Equivalent to
cat or BLT.
Originally the name of a Unix copy command with... - cat: [from `catenate' via {{UNIX}} `cat(1)'] vt.
1.
[techspeak] To spew an entire file to the screen or... - cat [from `catenate' via Unix cat(1)] vt.
1. [techspeak] To spew an entire file to the screen or some other
output sink without pause.
2. By extension, to dump large amounts of data at... - swab: /swob/ [From the mnemonic for the PDP-11 `SWAp Byte'
instruction,
as immortalized in the `dd(1)' option `conv=swab' ... - flush: v. 1. To delete something, usually superfluous,
or to abort an operation. "All that nonsense has... - JCL: /J-C-L/ n. 1. IBM's supremely {rude} Job Control
Language.
JCL is the script language used to control the execution... - flush v.
1. [common] To delete something, usually
superfluous,
or to abort an operation. "All that nonsense has ... - EOF: /E-O-F/ [abbreviation, `End Of File'] n. 1. [techspeak] The
{out-of-band} value returned by C's sequential character-input
functions (and their equivalents in other environments) when end of
file has been reached.
This value is -1 under C libraries postdating V6... - nuke: /n[y]ook/ vt. 1. To intentionally delete the entire
contents of a given directory or storage volume.
"On UNIX, `rm -r /usr' will nuke everything in the...
From the same category:
- LIBERTY, n. One of Imagination's most precious possessions.
The rising People, hot and out of breath, Roared... - Can Rush Limbaugh PROVIDE a GOOD JOB for
ANYBODY... - A friend told me to shoot first and ask questions later.
I was going to ask him why, but I had to shoot him... - The best in this kind are but shadows.
-- William Shakespeare (1564-1616),
A Midsummer Night's Dream -- Act v, Sc.... - I'll be back in
a GIF...
