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Admin: Skapade sidan med ''''dd(1p) - Linux manual page''' == PROLOG == This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. == NAME == dd — convert and copy a file == SYNOPSIS == `dd [operand...]` == DESCRIPTION == The `dd` utility shall copy the specified input file to the specified...'

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Skapade sidan med ''''dd(1p) - Linux manual page''' == PROLOG == This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. == NAME == dd — convert and copy a file == SYNOPSIS == <code>dd [operand...]</code> == DESCRIPTION == The <code>dd</code> utility shall copy the specified input file to the specified...'

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'''dd(1p) - Linux manual page'''

== PROLOG ==
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

== NAME ==
dd — convert and copy a file

== SYNOPSIS ==
<code>dd [operand...]</code>

== DESCRIPTION ==
The <code>dd</code> utility shall copy the specified input file to the specified output file with possible conversions using specific input and output block sizes. It reads input one block at a time, applies specified conversions, and writes output accordingly.

=== Processing Steps ===
# An input block is read.
# If the input block is shorter than the specified input block size and <code>sync</code> conversion is specified, null bytes shall be appended.
# If <code>bs=expr</code> is specified and no conversion other than <code>sync</code> or <code>noerror</code> is requested, the data is written as a single block.
# If <code>swab</code> is specified, pairs of input bytes shall be swapped.
# Other conversions (<code>block</code>, <code>unblock</code>, <code>lcase</code>, <code>ucase</code>) are performed.
# Data is aggregated into output blocks of the specified size.

== OPTIONS ==
None.

== OPERANDS ==
* <code>if=file</code> - Specify input file (default: standard input).
* <code>of=file</code> - Specify output file (default: standard output).
* <code>ibs=expr</code> - Set input block size (default: 512 bytes).
* <code>obs=expr</code> - Set output block size (default: 512 bytes).
* <code>bs=expr</code> - Set both input and output block size.
* <code>skip=n</code> - Skip <code>n</code> input blocks.
* <code>seek=n</code> - Skip <code>n</code> output blocks.
* <code>count=n</code> - Copy only <code>n</code> input blocks.
* <code>conv=value</code> - Apply conversions like <code>ascii</code>, <code>ebcdic</code>, <code>lcase</code>, <code>ucase</code>, <code>swab</code>, etc.

== EXIT STATUS ==
* <code>0</code> - Success.
* <code>>0</code> - An error occurred.

== EXAMPLES ==
Copy from tape drive 0 to tape drive 1:
<code>
dd if=/dev/rmt0h of=/dev/rmt1h
</code>

Strip the first 10 bytes from input:
<code>
dd ibs=10 skip=1
</code>

Convert an EBCDIC tape to ASCII:
<code>
dd if=/dev/tape of=x ibs=800 cbs=80 conv=ascii,lcase
</code>

== SEE ALSO ==
* [[sed(1p)]]
* [[tr(1p)]]

== COPYRIGHT ==
Portions of this text are reprinted from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX). The official standard can be found at [http://www.opengroup.org/unix/online.html The Open Group].

= Sidslut =

Orginalhemsidan på Engelska :https://man7.org/linux/man-pages/man1/dd.1p.html
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