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dd(1) - dd, dd - convert and copy a file - man 1 dd

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DD(1)                                 FSF                                DD(1)



NAME
       dd - convert and copy a file(1,n)

SYNOPSIS
       dd [OPTION]...

DESCRIPTION
       Copy a file(1,n), converting and formatting according to the options.

       bs=BYTES
              force ibs=BYTES and obs=BYTES

       cbs=BYTES
              convert BYTES bytes at a time(1,2,n)

       conv=KEYWORDS
              convert the file(1,n) as per the comma separated keyword list

       count=BLOCKS
              copy only BLOCKS input blocks

       ibs=BYTES
              read(2,n,1 builtins) BYTES bytes at a time(1,2,n)

       if(3,n)=FILE
              read(2,n,1 builtins) from FILE instead of stdin

       obs=BYTES
              write(1,2) BYTES bytes at a time(1,2,n)

       of=FILE
              write(1,2) 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(3,n,1 builtins)

       --version
              output version(1,3,5) information and exit(3,n,1 builtins)

       BLOCKS  and  BYTES may be followed by the following multiplicative suf-
       fixes: xM M, c 1, w 2,  b  512,  kD  1000,  k  1024,  MD  1,000,000,  M
       1,048,576, GD 1,000,000,000, G 1,073,741,824, and so on for T, P, E, Z,
       Y.  Each KEYWORD may be:

       ascii(1,7)  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(1,8) cbs-size records with newline

       lcase  change upper case to lower case

       notrunc
              do not truncate(2,7) the output file(1,n)

       ucase  change lower case to upper case

       swab   swap every pair of input bytes

       noerror
              continue after read(2,n,1 builtins) errors

       sync(1,2,8)   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-fileutils@gnu.org>.

COPYRIGHT
       Copyright  2001 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is
       NO  warranty;  not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.

SEE ALSO
       The full documentation for dd is maintained as a  Texinfo  manual.   If
       the  info(1,5,n) and dd programs are properly installed at your site, the com-
       mand

              info(1,5,n) dd

       should give you access(2,5) to the complete manual.



dd (fileutils) 4.1                April 2001                             DD(1)

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