DD(1) DD(1)
[--help] [--version] [if=file] [of=file] [ibs=bytes] [obs=bytes]
[bs=bytes] [cbs=bytes] [skip=blocks] [seek=blocks] [count=blocks]
[conv={ascii, ebcdic, ibm, block, unblock, lcase, ucase, swab, noerror,
notrunc, sync}]
()
dd
( 512 )
1 bs=bytes
sync, noerror, notrunc
()
sync
sync
NUL ()
1
() x 2
if=file
file
of=file
file
conv=notrunc
dd
file
(: ) 0 ( seek= )
ibs=bytes
bytes
512
obs=bytes
bytes
512
bs=bytes
bytes
ibs
obs
( sync, noerror, notrunc
bs
ibs
obs
bs
)
cbs=bytes
block
unblock
skip=blocks
ibs
blocks
seek=blocks
obs
blocks
count=blocks
ibs
blocks
conv=CONVERSION[,CONVERSION]...
CONVERSION ()
ascii EBCDIC ASCII
ebcdic ASCII EBCDIC
ibm ASCII (IBM ) EBCDIC
block cbs
unblock
cbs
lcase
ucase
swab (2) GNU dd
()
noerror
notrunc
(:
)
sync block unblock
ibs
NUL ( 0)
--help
--version
--
B
10 D
`1KB' `1024' `1KD' `1000'
b (512 )c (1 ) w ( - System V 2 4.2BSD 4 ) 3
B D
k : 2^10 = 102410 10^3 = 1000
M : 2^20 = 1,048,576 10^6 = 1,000,000
G : 2^30 = 1,073,741,824 10^9 = 1,000,000,000
T : 2^40 = 1,099,511,627,776 10^12 = 1,000,000,000,000
P : 2^50 = 1,125,899,906,842,624
10^15 = 1,000,000,000,000,000
E : 2^60 = 1,152,921,504,606,846,976
10^18 = 1,000,000,000,000,000,000
Z : 2^70 = 1,180,591,620,717,411,303,424
10^21 = 1,000,000,000,000,000,000,000
Y : 2^80 = 1,208,925,819,614,629,174,706,176
10^24 = 1,000,000,000,000,000,000,000,000
LANG, LC_ALL, LC_CTYPE, LC_MESSAGES
POSIX 1003.2
fileutils-4.1 dd ;
aeb [AT] cwi.nl, aw [AT] mail1.fi, ragnar [AT] ragnar-hojland.com
bug-fileutils [AT] gnu.org
GNU fileutils 4.1 18 June 2002 DD(1)