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Man Pages - Manpage for ddMan Pages - Manpage for dd

Posted May 26th, 2004 in Man Pages (Updated June 15th, 2004)

Man page for the unix linux bsd command dd.

NAME

dd - convert and copy a file

SYNOPSIS

dd [OPTION]...

DESCRIPTION

Copy a file, converting and formatting according to the options.

bs=BYTES

force ibs=BYTES and obs=BYTES

cbs=BYTES

convert BYTES bytes at a time

conv=KEYWORDS

convert the file as per the comma separated keyword list

count=BLOCKS

copy only BLOCKS input blocks

ibs=BYTES

read BYTES bytes at a time

if=FILE

read from FILE instead of stdin

obs=BYTES

write BYTES bytes at a time

of=FILE

write to FILE instead of stdout

seek=BLOCKS

skip BLOCKS obs-sized blocks at start of output

skip=BLOCKS

skip BLOCKS ibs-sized blocks at start of input

--help display this help and exit

--version

output version information and exit

BLOCKS and BYTES may be followed by the following multiplicative suffixes: xM M, c 1, w 2, b 512, kB 1000, K 1024, MB 1,000,000, M 1,048,576, GB 1,000,000,000, G 1,073,741,824, and so on for T, P, E, Z, Y. Each KEYWORD may be:

ascii from EBCDIC to ASCII

ebcdic from ASCII to EBCDIC

ibm from ASCII to alternated EBCDIC

block pad newline-terminated records with spaces to cbs-size

unblock

replace trailing spaces in cbs-size records with newline

lcase change upper case to lower case

notrunc

do not truncate the output file

ucase change lower case to upper case

swab swap every pair of input bytes

noerror

continue after read errors

sync pad every input block with NULs to ibs-size; when used

with block or unblock, pad with spaces rather than NULs

AUTHOR

Written by Paul Rubin, David MacKenzie, and Stuart Kemp.

REPORTING BUGS

Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

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