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	== Quick Example ==		== Quick Example ==

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	== Quick Example ==		== Quick Example ==

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[[Category:Post-It]]

== Quick Example ==

<nowiki>
dd bs=1M status=progress if=/path/to/source of=/path/to/destination</nowiki>

== dd --help ==

<nowiki>
Usage: dd [OPERAND]...
or: dd OPTION
Copy a file, converting and formatting according to the operands.

bs=BYTES read and write up to BYTES bytes at a time (default: 512);
overrides ibs and obs
cbs=BYTES convert BYTES bytes at a time
conv=CONVS convert the file as per the comma separated symbol list
count=N copy only N input blocks
ibs=BYTES read up to BYTES bytes at a time (default: 512)
if=FILE read from FILE instead of stdin
iflag=FLAGS read as per the comma separated symbol list
obs=BYTES write BYTES bytes at a time (default: 512)
of=FILE write to FILE instead of stdout
oflag=FLAGS write as per the comma separated symbol list
seek=N (or oseek=N) skip N obs-sized output blocks
skip=N (or iseek=N) skip N ibs-sized input blocks
status=LEVEL The LEVEL of information to print to stderr;
'none' suppresses everything but error messages,
'noxfer' suppresses the final transfer statistics,
'progress' shows periodic transfer statistics

N and BYTES may be followed by the following multiplicative suffixes:
c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, xM=M,
GB=1000*1000*1000, G=1024*1024*1024, and so on for T, P, E, Z, Y.
Binary prefixes can be used, too: KiB=K, MiB=M, and so on.
If N ends in 'B', it counts bytes not blocks.

Each CONV symbol may be:

ascii from EBCDIC to ASCII
ebcdic from ASCII to EBCDIC
ibm from ASCII to alternate 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
ucase change lower case to upper case
sparse try to seek rather than write all-NUL output blocks
swab swap every pair of input bytes
sync pad every input block with NULs to ibs-size; when used
with block or unblock, pad with spaces rather than NULs
excl fail if the output file already exists
nocreat do not create the output file
notrunc do not truncate the output file
noerror continue after read errors
fdatasync physically write output file data before finishing
fsync likewise, but also write metadata

Each FLAG symbol may be:

append append mode (makes sense only for output; conv=notrunc suggested)
direct use direct I/O for data
directory fail unless a directory
dsync use synchronized I/O for data
sync likewise, but also for metadata
fullblock accumulate full blocks of input (iflag only)
nonblock use non-blocking I/O
noatime do not update access time
nocache Request to drop cache. See also oflag=sync
noctty do not assign controlling terminal from file
nofollow do not follow symlinks

Sending a USR1 signal to a running 'dd' process makes it
print I/O statistics to standard error and then resume copying.

Options are:

--help display this help and exit
--version output version information and exit

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Full documentation <https://www.gnu.org/software/coreutils/dd>
or available locally via: info '(coreutils) dd invocation'</nowiki>

== Manpage ==

<nowiki>
DD(1) User Commands DD(1)

NAME
dd - convert and copy a file

SYNOPSIS
dd [OPERAND]...
dd OPTION

DESCRIPTION
Copy a file, converting and formatting according to the operands.

bs=BYTES
read and write up to BYTES bytes at a time (default: 512); overrides ibs and obs

cbs=BYTES
convert BYTES bytes at a time

conv=CONVS
convert the file as per the comma separated symbol list

count=N
copy only N input blocks

ibs=BYTES
read up to BYTES bytes at a time (default: 512)

if=FILE
read from FILE instead of stdin

iflag=FLAGS
read as per the comma separated symbol list

obs=BYTES
write BYTES bytes at a time (default: 512)

of=FILE
write to FILE instead of stdout

oflag=FLAGS
write as per the comma separated symbol list

seek=N (or oseek=N) skip N obs-sized output blocks

skip=N (or iseek=N) skip N ibs-sized input blocks

status=LEVEL
The LEVEL of information to print to stderr; 'none' suppresses everything but error messages, 'noxfer' suppresses the final transfer statistics, 'progress' shows periodic transfer statistics

N and BYTES may be followed by the following multiplicative suffixes: c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, xM=M, GB=1000*1000*1000, G=1024*1024*1024, and so on for T, P, E,
Z, Y. Binary prefixes can be used, too: KiB=K, MiB=M, and so on. If N ends in 'B', it counts bytes not blocks.

Each CONV symbol may be:

ascii from EBCDIC to ASCII

ebcdic from ASCII to EBCDIC

ibm from ASCII to alternate 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

ucase change lower case to upper case

sparse try to seek rather than write all-NUL output blocks

swab swap every pair of input bytes

sync pad every input block with NULs to ibs-size; when used with block or unblock, pad with spaces rather than NULs

excl fail if the output file already exists

nocreat
do not create the output file

notrunc
do not truncate the output file

noerror
continue after read errors

fdatasync
physically write output file data before finishing

fsync likewise, but also write metadata

Each FLAG symbol may be:

append append mode (makes sense only for output; conv=notrunc suggested)

direct use direct I/O for data

directory
fail unless a directory

dsync use synchronized I/O for data

sync likewise, but also for metadata

fullblock
accumulate full blocks of input (iflag only)

nonblock
use non-blocking I/O

noatime
do not update access time

nocache
Request to drop cache. See also oflag=sync

noctty do not assign controlling terminal from file

nofollow
do not follow symlinks

Sending a USR1 signal to a running 'dd' process makes it print I/O statistics to standard error and then resume copying.

Options are:

--help display this help and exit

--version
output version information and exit

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

REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
Copyright © 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/dd>
or available locally via: info '(coreutils) dd invocation'

GNU coreutils 9.1 September 2022 DD(1)</nowiki>

DD - Manpage - Revision history

Admin: Text replacement - "Category:Wiki" to "Category:Wiki '''''[https://it-arts.net/index.php/Category:Wiki Return to Wiki Index]''''' "

Admin: Text replacement - "Category:Post-It" to "Category:Wiki"

Admin at 10:05, 17 November 2024